Fizik Vento Infinito Knit Carbon 2 Cycling Road Shoes - (Wide fit)For those of you who want a wide-fitting performance cycling shoe the Fizik Vento Infinito Knit Carbon 2 Cycling Road Shoes - (Wide fit) are hard to beat. Superb comfort and optimal power transfer come as standard. Featherweight Knitted UpperThe Vento Infinito Knit Carbon 2 Road Shoes have been raced and proven their performance in the heat of the pro-peloton. This wide-fit iteration has seen further improvements to the already outstanding knitted upper. It's now lighter than ever with improved ventilation too. Just as before the design allows for outstanding breathability, with ventilation zones integrated seamlessly into the upper.Fizik have stripped away more weight from Vento but have retained the same fabulous foot support. The knit system, with heat-fused TPU yarns, offers foot support just where you need it most, and less bulk where you don't. This gives you just the same pedalling efficiency and foot support you'd expect of a traditional cycling shoe but with less weight and more ventilation. A win-win situation. Customised Fit - BOA Fit SystemTo give a customisable and comfortable fit, the Vento uses the dual Li2 BOA fit system. The Li2 dials have been redesigned to offer a lower profile, marginally improving aerodynamics while also making them less vulnerable to being accidentally hit. Each dial gives quick and easy micro-adjustment, with independent adjustment of the forefoot and instep. Fine-tuning the fit to your particular foot shape is now remarkably easy. R2 Carbon OutsoleThe stiffest and lightest sole unit in the Fizik range, R2 Carbon Outsole delivers incredible responsiveness, with power transferred to your pedals with outstanding efficiency. Jump for a sprint or attack a climb and you're rewarded with immediate acceleration - only fitness is holding you back.Efficient pedalling is also optimised thanks to the cleat track position. This has been set further rearwards to improve pedalling dynamics, reduce knee compression and power transfer - it's especially well-suited to very aggressive, forward aero riding positions.Cleat GuidanceThese Cycling Shoes are compatible with road bike pedal systems that use cleats with 3-bolt standards, such as: Look Delta and Keo, Shimano SPD-SL, Speedplay Light Action, Zero, X-Series (via 3-hole adapter plate), Campagnolo Pro-Fit, Mavic Zxellium, Time Iclic/Xpresso and Time Impact.Features:Knitted PU laminated mesh upperLi2 Dual Zone BOA Fit SystemIndependent fit adjustment for instep and forefootDynamic Arch Support 2.0: tailored fit of the plantar archR2 carbon outsole - full carbon unidirectional, stiffness index 10/103-bolt cleat compatible (cleats not supplied)Weight: 225g (size 42 - 1/2 pair)Buy Fizik Footwear from Chain Reaction Cycles, the World's Largest Online Bike Store.
Fizik Vento Infinito Knit Carbon 2 Cycling Road Shoes - (Wide fit)For those of you who want a wide-fitting performance cycling shoe the Fizik Vento Infinito Knit Carbon 2 Cycling Road Shoes - (Wide fit) are hard to beat. Superb comfort and optimal power transfer come as standard. Featherweight Knitted UpperThe Vento Infinito Knit Carbon 2 Road Shoes have been raced and proven their performance in the heat of the pro-peloton. This wide-fit iteration has seen further improvements to the already outstanding knitted upper. It's now lighter than ever with improved ventilation too. Just as before the design allows for outstanding breathability, with ventilation zones integrated seamlessly into the upper.Fizik have stripped away more weight from Vento but have retained the same fabulous foot support. The knit system, with heat-fused TPU yarns, offers foot support just where you need it most, and less bulk where you don't. This gives you just the same pedalling efficiency and foot support you'd expect of a traditional cycling shoe but with less weight and more ventilation. A win-win situation. Customised Fit - BOA Fit SystemTo give a customisable and comfortable fit, the Vento uses the dual Li2 BOA fit system. The Li2 dials have been redesigned to offer a lower profile, marginally improving aerodynamics while also making them less vulnerable to being accidentally hit. Each dial gives quick and easy micro-adjustment, with independent adjustment of the forefoot and instep. Fine-tuning the fit to your particular foot shape is now remarkably easy. R2 Carbon OutsoleThe stiffest and lightest sole unit in the Fizik range, R2 Carbon Outsole delivers incredible responsiveness, with power transferred to your pedals with outstanding efficiency. Jump for a sprint or attack a climb and you're rewarded with immediate acceleration - only fitness is holding you back.Efficient pedalling is also optimised thanks to the cleat track position. This has been set further rearwards to improve pedalling dynamics, reduce knee compression and power transfer - it's especially well-suited to very aggressive, forward aero riding positions.Cleat GuidanceThese Cycling Shoes are compatible with road bike pedal systems that use cleats with 3-bolt standards, such as: Look Delta and Keo, Shimano SPD-SL, Speedplay Light Action, Zero, X-Series (via 3-hole adapter plate), Campagnolo Pro-Fit, Mavic Zxellium, Time Iclic/Xpresso and Time Impact.Features:Knitted PU laminated mesh upperLi2 Dual Zone BOA Fit SystemIndependent fit adjustment for instep and forefootDynamic Arch Support 2.0: tailored fit of the plantar archR2 carbon outsole - full carbon unidirectional, stiffness index 10/103-bolt cleat compatible (cleats not supplied)Weight: 225g (size 42 - 1/2 pair)Buy Fizik Footwear from Chain Reaction Cycles, the World's Largest Online Bike Store.
Fizik Vento Infinito Knit Carbon 2 Cycling Road Shoes - (Wide fit)For those of you who want a wide-fitting performance cycling shoe the Fizik Vento Infinito Knit Carbon 2 Cycling Road Shoes - (Wide fit) are hard to beat. Superb comfort and optimal power transfer come as standard. Featherweight Knitted UpperThe Vento Infinito Knit Carbon 2 Road Shoes have been raced and proven their performance in the heat of the pro-peloton. This wide-fit iteration has seen further improvements to the already outstanding knitted upper. It's now lighter than ever with improved ventilation too. Just as before the design allows for outstanding breathability, with ventilation zones integrated seamlessly into the upper.Fizik have stripped away more weight from Vento but have retained the same fabulous foot support. The knit system, with heat-fused TPU yarns, offers foot support just where you need it most, and less bulk where you don't. This gives you just the same pedalling efficiency and foot support you'd expect of a traditional cycling shoe but with less weight and more ventilation. A win-win situation. Customised Fit - BOA Fit SystemTo give a customisable and comfortable fit, the Vento uses the dual Li2 BOA fit system. The Li2 dials have been redesigned to offer a lower profile, marginally improving aerodynamics while also making them less vulnerable to being accidentally hit. Each dial gives quick and easy micro-adjustment, with independent adjustment of the forefoot and instep. Fine-tuning the fit to your particular foot shape is now remarkably easy. R2 Carbon OutsoleThe stiffest and lightest sole unit in the Fizik range, R2 Carbon Outsole delivers incredible responsiveness, with power transferred to your pedals with outstanding efficiency. Jump for a sprint or attack a climb and you're rewarded with immediate acceleration - only fitness is holding you back.Efficient pedalling is also optimised thanks to the cleat track position. This has been set further rearwards to improve pedalling dynamics, reduce knee compression and power transfer - it's especially well-suited to very aggressive, forward aero riding positions.Cleat GuidanceThese Cycling Shoes are compatible with road bike pedal systems that use cleats with 3-bolt standards, such as: Look Delta and Keo, Shimano SPD-SL, Speedplay Light Action, Zero, X-Series (via 3-hole adapter plate), Campagnolo Pro-Fit, Mavic Zxellium, Time Iclic/Xpresso and Time Impact.Features:Knitted PU laminated mesh upperLi2 Dual Zone BOA Fit SystemIndependent fit adjustment for instep and forefootDynamic Arch Support 2.0: tailored fit of the plantar archR2 carbon outsole - full carbon unidirectional, stiffness index 10/103-bolt cleat compatible (cleats not supplied)Weight: 225g (size 42 - 1/2 pair)Buy Fizik Footwear from Chain Reaction Cycles, the World's Largest Online Bike Store.
Campagnolo Record Ultra Shift Levers (12 Sp)The Record Ultra Shift Levers (12 Sp) are packed with some of the finest technologies that Campagnolo have to offer, for ensuring you have a safe and smooth braking experience when out on the road.High-Performing and Reliable BrakingFeaturing the new carbon unidirectional lever for more enhanced stiffness and reliability, you will notice the improvement when riding at high speed or on steep slopes where this technology makes a serious difference. Thanks to the new controls, you can select two different lever-handlebar positions based on the size of your hand for a more comfortable and customised braking experience.While the Vari-Cushion technology provides an amazingly secure grip, the “one lever-one action” feature works to prevent any shifting errors, so you can enjoy a smoother and more stable ride than ever before.Designed with the thrill-seekers and road cycling enthusiasts in mind, the Campagnolo Record Ultra Shift Levers (12 Sp) are guaranteed to give you the edge over your competitors.Features: Comfortable support - Vari-Cushion: The controls enable a solid, safe grip when pedalling out of the saddle or gripping high on the handlebar. Rapid shifting: Immediate shifting engagement enables activating the front derailleur with minimum effort and in any hand position on the handlebar. Multiple action - Ultra-Shift: An unplanned ascent, a sudden jerk: it takes barely a moment to find the right ratio owing to the multiple action of the controls. Ergonomic: The shape of the body and the possibility to adjust the reach enable all cyclists to use these controls, regardless of the size of their hands or fingers. Brake lever with double curvature: Offers maximum safety from any position, due to both the curvature of the handlebar and the controls. Weight: 0.343kgBuy Campagnolo Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
The 100% Aircraft 2 Helmet sets the standard for high performance protection. With its shell constructed from carbon fibre it's both incredibly strong and lightweight. A full carbon fibre shell features Patent Pending injection molded chin bar integration that strengthens the front area, it also features chinbar rear support for additional reinforcement. The entire helmet is lined with Dual Density EPS foam, injection molded with polycarbonate designed to absorb heavy impacts. As well as the EPS foam lining the Aircraft 2, 100% have added their proprietary SmartShock system which utilises 14 small rubber elastomers suspending the helmet around the head to better absorb linear and rotational impact energy. Ventilation across the Aircraft 2 is an absolute game changer, vents along the chinbar, forehead and top of the helmet pull in plenty of air while massive vents towards the rear of the helmet vent air out to ensure you stay dry and cool. Washable, moisture-wicking anti-microbial liners are comfortable on skin and easily removable for cleaning straight after a heavy session. The multi-point adjustable visor on the Aircraft 2 is designed to give you maximum vision without obstructing your goggles. Finally a sturdy D-ring buckle secures the helmet comfortably in place even when it's tightened right up. The Aircraft 2 is tested and certified according to ASTM (F1952-15), CPSC (16 CFR 1203), CE (EN 1078:2012+A1:2012), and AS/NZS (2063:2008) Bicycle Standards. Sizing: Medium: 57-58cm (Cheek pad 25mm, Liner 10mm) Large: 59-60cm (Cheek pad 30mm, Liner 14mm)
New 12x Chorus Ultra-Torque chainset for use with the disc or rim brake groupset.The new Chorus chainset is a true concentrate of technology and versatility. Technically advanced thanks to unidirectional construction technology in carbon fibre, it is directly moulded without any surface coating and has an Ultra-Torque steel axle like the Record chainset. The new 12x cranks are more versatile thanks to the new bolt pcd of 123mm, giving it an extremely solid structure, also ensuring a wider variety of uses. The new smaller bolt circle on the Chorus chainset makes it compatible with 36/52, 34/50 and the brand new 32/48 ratio chainrings.Available in 170mm, 172.5mm and 175mm crank lengths. Technologies: Ultra-Torque axle: In steel,. Key Features: The Q Factor remains the same (145.5): The widths and biodynamics of the stroke are the same., Unidirectional carbon fibre cranks, steel axle and aluminium chainrings: Good stiffness and optimum power transmission., Symmetrical teeth on the internal chainring: Fluid, precise transmission, even with extreme cross-chaining., Optimised design for any chainring combination: Maximum performance, whatever the course style., Double Fixing: Assembly of the large chainring on to the crank is secured by a ring of 123mm bolts, while the inner chainring is attached to the outer by way of 96mm pcd bolts., Surface treatment of the chainrings for longer life, Weight: 718g (172.5 34/50).
Token C18CA Carbon MTB WheelsetWhether you're exploring the mountains with your friends or enjoying an all-day epic event, this MTB (mountain bike) wheelset is engineered for performance. It features a full carbon clincher rim construction, which means that you'll benefit from its exceptional strength to weight ratio. As a result, you'll enjoy its stiffness and strength when climbing, but on the way down you'll notice its low weight propelling you on.The C18CA is built for strength and speed and is equipped with Token's Anti-Vibration Technology (AVT), which not only cuts down on vibrations but most importantly for MTB riders, provides extra strength to withstand harsh punishment from the terrain.Weighing in at 1280g for a set, the C18CA is marked to be a serious contender for the off-road circuit.Features: Material: Full Carbon Fibre Clincher Use: MTB Type: Clincher Rim Profile: 18mm Hub: TK4925 Disc Hubset Axle Size: Front: 15x100; Rear 12x142 Freehub Compatibility: Shimano Hole Count: Front: 24; Rear: 28 Bearings: Sealed Spokes: SAPIM CX-RAY aero black spokes Nipples: Alloy external nipples Wheel Size: 26" Single or Pair: Pair Tubeless Ready: Yes Manufacturer's Part Number: TK-12BWRC18CASBK Weight: 1280g (pair)Technologies: AVT (Anti-Vibration Technology): Token fused a top-secret material with carbon to create AVT (Anti-Vibration Technology). Weight for weight, AVT is eight times stronger than steel, resistant to high temperatures, fatigue, impact and corrosion from chemicals or saltwater. Token cast a layer of AVT inside of the rim which gives you a super high tensile strength wheel and significantly reduces vibrations External Nipples: External nipples allow you to maintain wheels more convenientlyBuy Token Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
Featuring a slightly narrower toe box & tighter heel than the competition last and less overall volume than the Sport last. Designed for very high-cadence riding & higher pressure and a slimmer fit.Completed with Lake special features:BOA - BOA Closure System is a micro-cable closure system provides a fine-tunable, evenly distributed closure that eliminates pressure points & hot spots. It is the first mechanical system to meet Lake's exacting standards. Boa is a registered trademark of Boa Technology Inc.Outlast - Outlast SmartFabric Technology uses microencapsulated Phase Change Material (mPCM), which works on a microscopic level to maintain a constant skin temperature. This acts as a buffer against the extreme temperatures generated during high activity. The result is cooler or warmer depending on your body’s need, drier, less sweaty, more comfortable feet.K-Lite Leather - K-Lite kangaroo leather for Lake by Packer Leather, is the lightest, strongest & most durable natural leather. It utilises multiple surface treatments to better protect & increase the comfort of your feet. Duratek treatment strengthens the leather & protects it from abrasion, & Microblok antimicrobial treatment renders the leather uninhabitable to microbes & germs.
This Mathieu Van der Poel (MVDP) signature saddle features a high-quality fibra-tek cover, which allows it to handle all of the pressure and intensity associated with road racing and endurance riding. Selle Italia has also equipped it with carbon rails for a superior combination of stiffness, durability and low weight performance as you conquer every mile of road. Another highlight is it comes race-ready with a Superflow channel that runs down its middle section for relieving pressure from around your sit-bones and reducing numbness and fatigue. Weighing in at only 162g, this is a lightweight choice of upgrade for staying comfortable and supported without adding any unnecessary weight to your ride. A Never Ending Tradition Thanks to the collaboration with an undisputed champion, like Mathieu Van der Poel, the tradition is continuing in the best way; and it is from this partnership that the Flite Boost Kit Carbonio Superflow “MVDP edition” is born. Dedicated Logo Made in white, like the Flite Boost usually used by Mathieu during the race, it features a logo with the word MVDP created “ad hoc” for the athlete. Manufacturer's Part Number: 017A920ICA007 White L3
Balancing aerodynamics, weight, and affordability, the new Ultegra R8170 C50 wheelset is sure to inspire action on your group ride with its all-new tubeless carbon rim and updated, 12 and 11-speed compatible hub. Summiting climbs, carving descents, or cruising the flats, the new C50 is the jack of all trades among the new Ultegra R8170 wheel lineup. The tubeless, carbon rim features a 21 mm internal width that pairs nicely with wider, modern tires while the HYPERGLIDE cassette body is compatible with 11 and 12-speed cassettes. Centre-Lock Disc Rotor Mount The Centre Lock system makes an easy rotor installation possible with a spline mount and a lock ring. The lock ring mounting system reduces the total working hours by shortening the amount of time of both installation and de-installation. In addition, the secure fixing by the spline mount enhances precision and rigidity while improving braking efficiency. D2 Aerodynamic Rim Profile Aerodynamic performance is affected by wind direction. To create the D2 rim, Shimano engineers considered both frontal and crosswinds, aiming to achieve optimal performance in real-world riding conditions. Extensive prototype testing, in the wind tunnel and on the road, proved that a wide rim shape with a deep tire bed performs best across a wide range of conditions. At yaw angles ranging from 0 to 15 degrees, the Shimano D2 rim profile reduces air drag better than others aero shape rims. This rim design also boosts lateral wheel stiffness and offers improved vertical compliance for increased control, comfort and durability on the road. Shimano E-Thru Axle System The tool-less type thru-axle skewer system optimizes rigidity and weight balance and enables easy operation with a reliable internal cam mechanism. The 15 mm thru-axle system is 15% stiffer torsionally and 25% stiffer in transverse shear than a traditional 9 mm quick release front axle system. High rigidity is secured while keeping the optimum weight balance. The E-Thru axle hub system minimizes the distortion of suspension while maintaining lightweight for riding around sharp corners at high speed. Rear Wheel OPTBAL Spoke System The OPTBAL rear wheel spoke system features 21 spokes—14 on the drive side and 7 on the non-drive side. Cassette spacing in today’s wheels produces unbalanced tension in traditional 1:1 spoke systems. This unbalance is intensified with the 11-speed cassette, producing nearly double the tension on the drive side spokes. Generally, high and low tension spokes have respectively tendency toward breaking down and coming loose spoke nipples. Unbalanced tension affects durability and strength. The OPTBAL design rebalances spoke tension, enhancing wheel rigidity and strength for a more durable wheel.
Campagnolo Super Record 12 Speed Hydraulic Ergos and CaliperMore ergonomic, more precise, more powerful and easier to maintain, this set combines an Ergopower Super Record 12 speed disc brake controller and a brake caliper to keep your ride under control in all road cycling situations. Benefitting from many of Campagnolo's finest technologies including Vari-Cushion, One lever-One action, AMS Adjustment and an Ultra-Shift System, this model also offers a wide range of features and customisation for fine-tuning your braking and shifting performance.12 Speed Ergopower Super Record Disc Brake ControllerThe mechanical controller for the Ergopower Super Record 12x2 Speed Disc Brake offers an ergonomic, comfortable and safe support and grip thanks to Vari-Cushion technology, essential for those who stay on the saddle for several hours. The controls' inner workings are a concentration of technology and experience, starting with the "one lever-one action" function, which assigns each lever a single function, helping avoid shifting errors at tired or distracting moments, and then continue with the multiple shifting options which allows up- or downshifting by up to 5 sprockets at a time thanks to the Ultra-Shift mechanism. This function allows you to maintain cadence even in case of sudden changes of incline or rhythm, with speed and ease as useful as it is surprising.Further useful features are the levers' adjustability, which, thanks to Reach Adjustment, enable a low grip on the brake lever, helping those with smaller hands; and AMS Adjustment, which enables braking power modulation, using the dedicated adjusters. The Super Record Disc Brake brake levers are engineered with a double curvature for improved grip and are lightened with two slots that are added to the one dedicated to Reach Adjustment.Campagnolo CaliperThe flat-mount Campagnolo brake caliper ensures powerful, modular braking in any situation owing to pistons measuring 22mm in diameter. The pad return is now optimised to ensure that there is no friction when the brake lever is released. A special metal plate positioned between the pad and the caliper piston cushions the vibrations during braking.The Campagnolo brake caliper is designed to be mounted together with the disc chosen by the rider (available separately) and to always guarantee the highest level of performance. Careful attention was given to making maintenance and assembly operations easy: the pads have wear indicators and replacing them is facilitated by the absence of physical return springs. Additionally, work was done on the insertion of the disc in the caliper to make changing the wheel easier and faster.Features: Use: Road Speed: 12 speed Controller Technologies: One lever-One action, Ultra-Shift System, Ergopower Control Caliper Technologies: Standard Flat Mount, 22mm pistons in phenolic resin, Piston-caliper connector, Interchangeable spare parts, Wear indicator Comfort: Vari-Cushion hood Adjustment: 3 levels of reach adjustment Ultra-Shift System: Up to 5 sprockets in downshifting, up to 3 in upshifting Enlarged Shifting Paddles Single or Pair: Single Weight: 462gTechnologies: Controller Technologies: Comfortable Body: The controls enable a solid, safe grip when pedalling out of the saddle or gripping high on the handlebar. Rapid Shifting: Immediate shifting engagement enables activating the front derailleur with minimum effort and in any hand position on the bar. Multiple Action: An unplanned ascent, a sudden jerk: it takes barely a moment to find the right ratio owing to the multiple action of the controls. Ergonomic: The shape of the body and the possibility to adjust the reach enable all cyclists to use these controls, regardless of the size of their hands or fingers. Customisable: 3 levels of reach adjustment. Upshifting Lever Integration: More space under the control body when gripping the Ergopower control. Disc Caliper: Flat mount disc only, to be compatible with the latest frame technology. Maximum Smoothness Cables: Updated cable set maintains exceptional smoothness far beyond those of the competition, maximum performance longevity. Superior Alignment: Braking lever pivot aligned with slant of ergo power, more efficient power transfer requiring less energy from rider's hand. Upgraded Brake Lever: The result of meticulous studies (double curve brake lever, updated form outward curve). Vari-Cushion Hood: Different thicknesses allowing for greater grip, comfort and water dispersion. Enlarged Shifting Paddles: For instant reaction access. Ultra-Shift System: Up to 5 sprockets in downshifting, up to 3 in upshifting. Caliper Technologies: UStandard Flat Mount: Fully compatible with flat-mount frames. 22mm Pistons in Phenolic Resin: Braking force and thermal isolation. Piston-Caliper Connector: The return action of the pistons is now optimised, rapidly returning the pads to their position and thus ensuring an overall clearance between pad and disc of 0.4-0.8 mm, with no risk of accidental contact. Interchangeable Spare Parts: Pads, cylinder, screws, bolts (same for all calipers): Fully compatible and optimised spare parts, making maintenance practical. Wear Indicator: It is very easy to see when the pads need to be replaced. Rounded Brake Pads: These facilitate disc insertion and speed up wheel changing. Anti-Vibration Plate: Optimal braking without vibrations. Two Fixing Screws: Rapid installation and maintenance.Manufacturer's Part Numbers:: CPB452C Black Carbon 160mm Caliper Rear-LH CPB453A Black Carbon 160mm Caliper Front-RHBuy Campagnolo Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
Shimano Ultegra R8170 C50 Carbon CL Disc WheelThe Shimano Ultegra R8170 C50 Wheel features a 50mm-deep full carbon tubeless ready rim with Shimano D2 rim profiling. This rim offers exceptional aerodynamic efficiency and agility while maintaining stability and control during strong cross winds. Suited to climbing sessions, long-distance fast events and epic endurance rides, this wheel features a centre lock disc rotor mount and is compatible with Shimano 11 and 12-Speed drivetrain systems.Balancing aerodynamics, weight, and affordability, the new Ultegra R8170 C50 wheelset is sure to inspire action on your group ride with its all-new tubeless carbon rim and updated, 12 and 11-speed compatible hub. Summiting climbs, carving descents, or cruising the flats, the new C50 is the jack of all trades among the new Ultegra R8170 wheel lineup. The tubeless, carbon rim features a 21 mm internal width that pairs nicely with wider, modern tires while the HYPERGLIDE cassette body is compatible with 11 and 12-speed cassettes. Centre-Lock Disc Rotor MountThe Centre Lock system makes an easy rotor installation possible with a spline mount and a lock ring. The lock ring mounting system reduces the total working hours by shortening the amount of time of both installation and de-installation. In addition, the secure fixing by the spline mount enhances precision and rigidity while improving braking efficiency. D2 Aerodynamic Rim ProfileAerodynamic performance is affected by wind direction. To create the D2 rim, Shimano engineers considered both frontal and crosswinds, aiming to achieve optimal performance in real-world riding conditions. Extensive prototype testing, in the wind tunnel and on the road, proved that a wide rim shape with a deep tire bed performs best across a wide range of conditions. At yaw angles ranging from 0 to 15 degrees, the Shimano D2 rim profile reduces air drag better than others aero shape rims. This rim design also boosts lateral wheel stiffness and offers improved vertical compliance for increased control, comfort and durability on the road. Shimano E-Thru Axle SystemThe tool-less type thru-axle skewer system optimizes rigidity and weight balance and enables easy operation with a reliable internal cam mechanism. The 15 mm thru-axle system is 15% stiffer torsionally and 25% stiffer in transverse shear than a traditional 9 mm quick release front axle system. High rigidity is secured while keeping the optimum weight balance. The E-Thru axle hub system minimizes the distortion of suspension while maintaining lightweight for riding around sharp corners at high speed. Rear Wheel OPTBAL Spoke SystemThe OPTBAL rear wheel spoke system features 21 spokes—14 on the drive side and 7 on the non-drive side. Cassette spacing in today's wheels produces unbalanced tension in traditional 1:1 spoke systems. This unbalance is intensified with the 11-speed cassette, producing nearly double the tension on the drive side spokes. Generally, high and low tension spokes have respectively tendency toward breaking down and coming loose spoke nipples. Unbalanced tension affects durability and strength. The OPTBAL design rebalances spoke tension, enhancing wheel rigidity and strength for a more durable wheel. Features: Series: Ultegra R8100 Series Rim: Carbon Tubeless Ready 50mm height full carbon rim Internal Rim Width: 21 mm Shared rim profile with R9200 Dura-Ace wheels Improved aerodynamics Axle: 12 mm E-THRU Rear Speeds: 11/12-Speed Shimano Disc Rotor Mount: Centre Lock Weight: Front: 698g; Rear: 872gA 2-year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).Buy Shimano Components from Chain Reaction Cycles, the World's Largest Online Bike Store.