Mavic Ksyrium S WheelsetDelivering reliability and performance, this road bike wheelset is ideal for when you're riding with your local road club or clocking up the miles on your own solo ride out. It features a hard-wearing Maxtal aluminium rim construction, which makes it tough and dependable during long days in the saddle. Mavic has also kitted out this model with a 22mm rim height and a 19mm internal rim width for excellent handling and smooth rotative performance. Benefitting from UST tubeless ready technology and a range of ride-enhancing features, this is a great choice of upgrade for a wide range of road disciplines.Maxtal Aluminium Road WheelsetThis lightweight aluminium wheelset is a no brainer for anybody looking to make an easy upgrade from OEM wheels. The Ksyrium S can significantly boost any bike's performance and is an easy entry point to Mavic quality that doesn't take any shortcuts.Fore Tapeless Tubeless TechnologyThe Ksyrium S is 60g lighter than the former Ksyrium UST while also being wider, stronger and laterally stiffer. Stiffness is optimised using Fore technology. The upper bridge remains undrilled, optimising strength and rigidity, and it doesn't require the use of a rim tape, which saves another 30g per wheel. The rim bed's revised shape makes it easier than ever to mount and remove tyres, and Mavic's UST Tubeless technology improves rolling resistance and grip while reducing the risk of punctures. These rims are made in France, in the brand's aluminium rim factory.Infinity Hub PlatformMavic's Infinity hub platform optimises stiffness and power transfer with highly controlled spoke tension, while an Instant Drive 360 freewheel coupled with the brand's automatic bearing preload adjustment (QRM Auto) delivers fast engagement and durability. The Ksyrium S doesn't just ride fast, it looks fast too. Matte painted hubs, invisible rim welding and deep black spokes give this wheelset a premium look that stands out from the crowd.Features: Rim Material: Maxtal Aluminium Axle Size: Front: 9x100mm; Rear: 9x130mm Use: Road Wheel Size: 700c Internal Rim Width: 19mm Rim Height: 22mm Tyre Compatibility: Clincher ETRTO: 622x19TC Tyre Type: UST Tubeless and Tubetype Max Pressure: See indication on wheel and tyre. If they differ, use the lowest of the 2 Recommended Tyre Sizes: 25 to 32mm Spokes Material: Steel Spokes Shape: Straight pull, flat, double-butted Spoke Count: Front 18, rear 24 Spoke Lacing: Front radial, rear Isopulse Spoke Nipples: Fore integrated Aluminium Hubs: Infinity hubs Front and Rear Hub Bodies Material: Aluminium Freehub: SRAM XD-Road Axle Material: Aluminium ATSM Category: 2: Road and offroad with jumps less than 15cm Delivered With: BR101 quick releases, UST valve and accessories, User guide Brake Type: Disc brake, Centre Lock compatible Single or Pair: Pair Fore tapeless tubeless technology UST tubeless technology SUP welding technology Instant Drive 360 freewheel technology QRM Auto bearing preload technology Weight: Pair: 1570g; Front: 675g; Rear: 895gTechnologies: Maxtal Aluminium Alloy: Light and strong Exclusive to Mavic, this specific aluminium alloy offers a higher strength to weight ratio than conventional 6106 alloy. Fore Tapeless Tubeless Technology: Stiffer and stronger Instead of being drilled, the lower rim bridge is pushed up on the inside, then threaded to enable the spoke nipples to be directly screwed in it, leaving the upper rim bridge intact. UST Tubeless Technology: Traction and control Universal Standard for Tubeless. Ready to ride tubeless system. The UST concept improves traction, control and comfort whilst reducing inertia and flats. Instant Drive 360 Freewheel Technology: The Instant Drive 360 freewheel system is super light and efficient. A large contactless rubber seal provides low friction, while a wide array of end caps makes it super versatile. Isopulse Lacing Design: Optimum energy transfer The spokes are laced radially on the drive side and crossed 2 on the non drive side to maximise drive side dish, thus providing a better spoke tension balance between left and right flanges. QRM Auto Bearing Preload Technology: Qualité de Roulements Mavic Auto is Mavic's latest innovation. Those cartridge bearings are of course double sealed with C3 internal clearance. Their preload is automatically adjusted to guarantee a perfect spin with no play on the long run. SUP Welding Technology: Stronger and smoother joint Soudé Usiné Process. After bending, the rim joint is arc welded. The welded seam is then milled for a smooth finish.Manufacturer's Part Numbers: P1462160 Black 700c SRAM XD XDRBuy Mavic Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
While the focus of the Racing 4 centers on aerodynamics, the Racing 5 looks to keep weight low and stability high in the event of cross winds. A lower profile rim measuring just 24.5mm front and 27.5mm rear in depth not only makes for increased stability and lower rotational mass but also reduces weight to a scant 1650gr for the pair. Lighter than the previous version by the same name.The Racing 5 DB tend to be more of a climber’s wheel that is ready to perform over any course. Straight pull spokes, disc specific hub and a 2-Way Fit Ready™ construction make for a sophisticated wheel in its own right that caters to climbers but is a perfect all around wheel forany athlete, road or cross as he or she may prefer.Key Features:Tyre Type: 2-Way Fit Ready,Road Weight: 1650 g,Rim height: Front 24.5mm and rear 27.5mm,Rim width: 23mm,Tyre Width: From 25mm to 50mm,Compatibility: QR/HH15-100/HH12-100 (no skewers incl.).
This versatile road bike wheelset is equipped with a robust maxtal aluminium rim construction, which allows it to deliver exceptional strength without adding any unnecessary grams to your ride. Mavic has also kitted it out with some of its finest technologies including Fore tapeless tubeless technology, which means that no rim tape is needed, saving 60g over a traditional wheelset. With double-butted, straight-pull steel spokes and Centre-Lock disc brake compatibility, this wheelset is perfect for road riders who want greater stability and control, wherever their next journey takes them. Lightweight, Tubeless-Ready Road Wheelset The Ksyrium S Disc is 40g lighter than the former Ksyrium UST Disc while also being stronger and laterally stiffer. Stiffness is optimised using Fore technology. The upper bridge remains undrilled, optimising strength and rigidity, and it doesn’t require the use of a rim tape, which saves another 30g per wheel. The rim bed’s updated shape makes it easier than ever to mount and remove tyres, and Mavic's UST Tubeless technology improves rolling resistance and grip, while reducing the risk of punctures. Made in France, in Mavic's aluminium rim factory. Infinity Hub and Instant Drive 360 Freewheel This road bike wheelset's Infinity hub platform optimises stiffness and power transfer with highly controlled spoke tension, while its Instant Drive 360 freewheel coupled with Mavic's automatic bearing preload adjustment (QRM Auto) delivers fast engagement and durability. The Ksyrium S Disc doesn’t just ride fast, it looks fast too. Matte painted hubs, invisible rim welding and deep black spokes give this wheelset a premium look that stands out from the crowd. Engineered specifically for disc brakes, it's compatible with a 12x100 axle up front, and 12x142 rear, and can convert to Quick Release with supplied adaptors. Available in Shimano or SRAM XD-Road cassette options to select, the Mavic Ksyrium S Disc Road Wheelset can also be converted to Campagnolo with an optional driver body (sold separately). Item Top Features Continued: Compatibility Front Axle: 12x100 thru-axle, easily convertible to quick release with included adaptors. Not compatible with 15mm through axles Rear Axle: 12mm thru-axle, convertible to Quick Release with included adaptors Freewheel: Multiple options available to select from the drop-down menu Hubs Front: Quick release and 12x100 thru-axle compatible Rear: Quick Release, 12x142 and 12x135 compatible Front and Rear Bodies: Aluminium Axle Material: Aluminium Infinity Hubs QRM Auto bearing preload technology Instant Drive 360 freewheel technology Spokes Material: Steel Nipples: Fore integrated Aluminium Count: 24 front and rear Lacing: Front and rear crossed 2, contactless Shape: Straight pull, flat, double-butted Weight Pair: 700c: 1670g (Front: 750g; Rear: 820g) Max Rider Weight: 120kg (including bike) ASTM Category 2: Road and off-road with jumps less than 15cm Included Rear QR adaptors for Instant Drive 360 Front QR adaptors UST valve and accessories User guide Manufacturer's Part Numbers: LP1326100 Black 700c Shimano (Ksyrium S DCL Pr) LP1462100 Black 700c SRAM XD XDR (Ksyrium S DCL Pr XDR)
Whether you're riding with your local road club or clocking up the miles on your own solo ride out, this road bike wheelset is engineered for reliability and performance. It features a hard-wearing Maxtal aluminium rim construction, which makes it tough and dependable during long days in the saddle. Mavic has also kitted out this model with a 22mm rim height and a 19mm internal rim width for excellent handling and smooth rotative performance. Benefitting from UST tubeless ready technology and a range of ride-enhancing features, this is a great choice of upgrade for a wide range of road disciplines. Maxtal Aluminium Road Wheelset This lightweight aluminium wheelset is a no brainer for anybody looking to make an easy upgrade from OEM wheels. The Ksyrium S can significantly boost any bike's performance and is an easy entry point to Mavic quality that doesn't take any shortcuts. Fore Tapeless Tubeless Technology The Ksyrium S is 60g lighter than the former Ksyrium UST while also being wider, stronger and laterally stiffer. Stiffness is optimised using Fore technology. The upper bridge remains undrilled, optimising strength and rigidity, and it doesn’t require the use of a rim tape, which saves another 30g per wheel. The rim bed’s revised shape makes it easier than ever to mount and remove tyres, and Mavic's UST Tubeless technology improves rolling resistance and grip while reducing the risk of punctures. These rims are made in France, in the brand's aluminium rim factory. Infinity Hub Platform Mavic's Infinity hub platform optimises stiffness and power transfer with highly controlled spoke tension, while an Instant Drive 360 freewheel coupled with the brand's automatic bearing preload adjustment (QRM Auto) delivers fast engagement and durability. The Ksyrium S doesn’t just ride fast, it looks fast too. Matte painted hubs, invisible rim welding and deep black spokes give this wheelset a premium look that stands out from the crowd. Additional Item Top Features: Rims Tyre: UST Tubeless and Tubetype Internal Width: 19mm ETRTO Size: 622x19TC Fore tapeless tubeless technology UST tubeless technology SUP welding technology Spokes Material: Steel Shape: Straight pull, flat, double butted Nipples: Fore integrated Aluminium Count: Front 18, rear 24 Lacing: Front radial, rear Isopulse Isopulse lacing design Hubs Front and Rear Bodies: Aluminium Axle Material: Aluminium Infinity hubs Instant Drive 360 freewheel technology QRM Auto bearing preload technology Freehub Compatibility: SRAM XD-Road Intended Use ASTM CATEGORY 2: Road and offroad with jumps less than 15cm For a longer longevity of the wheel, Mavic recommends that the total weight supported by the wheels doesn't exceed 120kg, bike included Recommended Tyre Sizes: 25 to 32mm Max. Pressure: See indication on wheel and tyre. If they differ, use the lowest of the 2 Delivered With BR101 quick releases UST valve and accessories User guide Technologies: Maxtal Aluminium Alloy: Light and strong Exclusive to Mavic, this specific aluminium alloy offers a higher strength to weight ratio than conventional 6106 alloy. Fore Tapeless Tubeless Technology: Stiffer and stronger Instead of being drilled, the lower rim bridge is pushed up on the inside, then threaded to enable the spoke nipples to be directly screwed in it, leaving the upper rim bridge intact. UST Tubeless Technology: Traction and control Universal Standard for Tubeless. Ready to ride tubeless system. The UST concept improves traction, control and comfort whilst reducing inertia and flats. Instant Drive 360 Freewheel Technology: The Instant Drive 360 freewheel system is super light and efficient. A large contactless rubber seal provides low friction, while a wide array of end caps makes it super versatile. Isopulse Lacing Design: Optimum energy transfer The spokes are laced radially on the drive side and crossed 2 on the non drive side to maximise drive side dish, thus providing a better spoke tension balance between left and right flanges. QRM Auto Bearing Preload Technology: Qualité de Roulements Mavic Auto is Mavic's latest innovation. Those cartridge bearings are of course double sealed with C3 internal clearance. Their preload is automatically adjusted to guarantee a perfect spin with no play on the long run. SUP Welding Technology: Stronger and smoother joint Soudé Usiné Process. After bending, the rim joint is arc welded. The welded seam is then milled for a smooth finish. Manufacturer's Part Numbers: P1462160 Black 700c SRAM XD XDR
Mavic Ksyrium S Road Disc WheelsetPerfect for everyday road cycling, this wheelset features a durable maxtal aluminium rim construction that offers fantastic strength without adding any unnecessary weight to your road bike. Mavic has also kitted it out with some of its finest technologies including Fore tapeless tubeless technology, which means that no rim tape is needed, saving 60g over a traditional wheelset. With double-butted, straight-pull steel spokes and Centre-Lock disc brake compatibility, this wheelset is ideal for road riders who want greater stability and control, wherever their next journey takes them. Lightweight, Tubeless-Ready Road WheelsetThe Ksyrium S Disc is 40g lighter than the former Ksyrium UST Disc while also being stronger and laterally stiffer. Stiffness is optimised using Fore technology. The upper bridge remains undrilled, optimising strength and rigidity, and it doesn't require the use of a rim tape, which saves another 30g per wheel. The rim bed's updated shape makes it easier than ever to mount and remove tyres, and Mavic's UST Tubeless technology improves rolling resistance and grip, while reducing the risk of punctures. Made in France, in Mavic's aluminium rim factory.Infinity Hub and Instant Drive 360 Freewheel This road bike wheelset's Infinity hub platform optimises stiffness and power transfer with highly controlled spoke tension, while its Instant Drive 360 freewheel coupled with Mavic's automatic bearing preload adjustment (QRM Auto) delivers fast engagement and durability. The Ksyrium S Disc doesn't just ride fast, it looks fast too. Matte painted hubs, invisible rim welding and deep black spokes give this wheelset a premium look that stands out from the crowd. Engineered specifically for disc brakes, it's compatible with a 12x100 axle up front, and 12x142 rear, and can convert to Quick Release with supplied adaptors. Available in Shimano or SRAM XD-Road cassette options to select, the Mavic Ksyrium S Disc Road Wheelset can also be converted to Campagnolo with an optional driver body (sold separately).Features: Rim Material: Maxtal Aluminium Hub Material: Front and Rear Bodies: Aluminium; Axle: Aluminium Spoke Material: Steel Use: Road Internal Rim Width: 19mm Height: 22mm ETRTO: 622x19TC Road Tubeless Ready: Yes, UST tubeless technology, Fore tapeless tubeless technology Tyre Compatibility: UST Tubeless and Tube type Brake Type: Disc brake specific profile, Centre-Lock Recommended Tyre Sizes: 25 to 32mm Rim Technologies: SUP welding technology Front Axle: 12x100 thru-axle, easily convertible to quick release with included adaptors. Not compatible with 15mm through axles Rear Axle: 12mm thru-axle, convertible to Quick Release with included adaptors Freewheel: Multiple options available to select from the drop-down menu Front Hub: Quick release and 12x100 thru-axle compatible Rear Hub: Quick Release, 12x142 and 12x135 compatible Hub Technologies: Infinity Hubs, Instant Drive 360 freewheel technology and QRM Auto bearing preload technology Spoke Count: Front and Rear: 24 Spoke Lacing: Front: and Rear: Crossed 2, contactless Spoke Shape: Straight pull, flat, double-butted Spoke Nipples: Fore integrated Aluminium ASTM Category 2: Road and Off-road with jumps less than 15cm Included: Rear QR adaptors for Instant Drive 360, front QR adaptors, UST valve and accessories, user guide Max Rider Weight: 120kg (including bike) Weight: Pair: 700c: 1670g (Front: 750g; Rear: 820g)Manufacturer's Part Numbers:LP1326100 Black 700c Shimano (Ksyrium S DCL Pr)LP1462100 Black 700c SRAM XD XDR (Ksyrium S DCL Pr XDR)Buy Mavic Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
Spank 350 Rear Mountain Bike WheelDesigned to tackle the toughest mountain bike (MTB) trails, the Spank 350 Rear Wheel gives you exceptional reliability and control, no matter what the terrain. Featuring a hard-wearing alloy construction, Spank has also kitted out this model with a wide profile, without adding any unnecessary weight. This makes it the ideal upgrade for trail-riders who want a versatile rear wheel for tackling every off-road challenge.Features:Use: Mountain Bike (MTB)Material: AlloyWidth: Inner: 30.5mm; Outer: 35mmHole Count: 32Valve: F/V PrestaERD (mm++): 27.5": 564mm; 29": 602mmTyre Type: ClincherRim Depth: DeepTubeless Ready: Yes30mm internal width extremely versatile, fitting tyres from 2.0” to 2.6” perfectly, and even allowing + size tyre use, without negative squaring off of tyre profiles.Technologies: Radially Compliant Rim Design, Oohbah Inverted Inner Wall, BeadBite anti-burp, Dynamal Alloy, optimized for Enduro/All-MountainSize/Width: 584x30.5mm; 29": 622x30.5mmWeight: 27.5": 500g; 29": 535gBuy Spank Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
Maximise your XC and Trail riding experience with the Turbine SL wheelset. Rolling on a tough, welded 6069 alloy tubeless-ready rim with a 25mm internal width, and laced to our tried and true Vault hub with its fast 3-degree engagement, oversized hub shell for increased stiffness and wide bearing stance for durability. This wheelset is light enough for XC epics but totally happy to tackle all those aggressive lines on your Trail adventures. No need to choose between light or strong wheels for your trail bike – the Turbine SL does both! Hub Features Large oversized flange for improved bracing angle and larger bearings. Wide bearing stance. 6 double tooth pawls (3 engage at a time). 120 points of engagement (3 degrees). Individually sprung pawls. One length spoke used throughout wheelset (F&R). Tool-free interchangeable end caps (sold separately). Low drag labyrinth cassette body seal. Rim Features Alloy 6069 Welded rim. 25mm Internal Width. Tubeless Ready Rim (Tape and valves installed). 3mm Offset improves spoke tension balance and wheel stiffness. High gloss black logos that are interchangeable with aftermarket color decal kits.
Hand built right here at Sourcebmx. This custom rear BMX wheel uses the tried and tested Profile Mini cassette hub in polished laced into a BSD NASA rim using high quality double butted rainbow spokes. NOTE: Please confirm the size of your driver at Checkout. Titanium driver and axle upgrades also available at checkout.###section### Product Specs WHEEL SIZE: 20" HUB: Profile Mini Cassette Hub AXLE: 14mm Male DRIVE SIDE: Right Side Drive RIM: BSD NASA Rim SPOKES: Double Butted Rainbow NIPPLES: Brass WEIGHT:
Hand built right here at Sourcebmx. This custom rear BMX wheel uses the tried and tested Profile Mini cassette hub in polished laced into a BSD NASA rim using high quality double butted rainbow spokes. NOTE: Please confirm the size of your driver at Checkout. Titanium driver and axle upgrades also available at checkout.###section### Product Specs WHEEL SIZE: 20" HUB: Profile Mini Cassette Hub AXLE: 14mm Male DRIVE SIDE: Left Side Drive RIM: BSD NASA Rim SPOKES: Double Butted Rainbow NIPPLES: Brass WEIGHT:
Ideally suited for hilly races, gravel and fast training rides, this wheelset comes equipped with two 6069 aluminium rims for the best balance of strength and durability on mixed terrains. Prime has also kitted out this updated model with a 21mm internal rim width and a 25mm rim depth for more balanced and consistent rolling performance. Another highlight is it's tubeless ready, so you can enjoy tubeless advantages such as lower rolling resistance, improved traction and fewer chances of punctures. Aerodynamic, Stiff and Reactive With the use of DT Swiss straight pull spokes, not only is aerodynamics improved, the Prime Attaquer Disc Alloy Wheelset is also stiffer and more reactive, so if you're in the market for a high-end alloy wheelset, look no further. Star Ratchet Hubs Another standout feature of this alloy road wheelset is its Star Rachet hubs. These provide superior reliability, due to each of the ratchets engaging simultaneously every time. Featuring an incorporated notch, the newly developed shape of the end caps simplifies disassembly significantly and therefore makes maintenance even easier. Tool-free freehub conversion is also possible. Optimal Braking Performance Disc brakes generate an incredible amount of stopping power, even in wet conditions, so you can fly up the hills and descend with confidence knowing that when you pair your favourite brakes to this set, you're going to get the control you need to succeed. This model is Centre Lock disc brake mount compatible. In The Box: 4 spare spokes & nipples Tubeless Valves QR Skewers 10 speed spacer 15mm thru axle end caps QR end caps Spares (available separately) 54 Tooth Star Ratchet Upgrade Kit Black One Size SR Hub Bushing Black 12mm Star Ratchet Grease Neutral <100ml SR1D 12mm Front End Caps Black 12mm SR1D 15mm Front End Caps Black 15mm SR1D Front Axle Silver 12 x 135mm SR1D QR Front End Caps Black QR SR1D 12mm Rear End Caps Black 12mm SR1D QR Rear End Caps Black QR SR1D Rear Axle Silver 12 x 142mm SR Freehub Body - Campagnolo Black 9/10/11 Speed SR Freehub Body - Campagnolo 13 Speed Black 13 Speed SR Freehub Body - Shimano Black 9/10/11 Speed SR Freehub Body - XDR Black 12 Speed Prime Crash Replacement Programme At Prime we understand that a crash or unexpected accident may occur under normal riding conditions. If in the event of a fall or accident where your Prime product sustains damage beyond repair, you can return the damaged component in exchange for a new product at 40% off the RRP. Please note that the Prime Crash Replacement Programme is only valid for the original purchaser within 2 years of purchase.
Whether you're tackling a fast training ride or competing in a hilly road racing event, this versatile wheelset is fine-tuned for smooth and reliable rolling performance. Its 6066 aluminium rim build provides maximum strength and durability as you conquer every mile of road, while its 19mm inner rim width and 25mm rim depth deliver balanced, aerodynamic properties to power you on. Star Ratchet Hubs Another standout feature of this alloy road wheelset is its Star Rachet hubs. These provide superior reliability, due to each of the ratchets engaging simultaneously every time. Featuring an incorporated notch, the newly developed shape of the end caps simplifies disassembly significantly and therefore makes maintenance even easier. Tool-free freehub conversion is also possible. Tubeless Ready and Rim Brake Compatible Developed for modern road riding and racing, this model comes kitted out with tubeless ready technology. This means that you can enjoy tubeless advantages by rolling lower tyre pressures and benefitting from increased traction, lower rolling resistance and fewer risks of punctures on your ride. Coming complete with rim brake compatibility for reliable stopping power as well as further weight savings, the Prime Attaquer Alloy Wheelset is a perfect upgrade for giving your next road journey a performance boost. In The Box: 4 spare spokes & nipples Tubeless Valves QR Skewers 10 speed spacer Prime Carbon Brake Pads Spares (available separately) 54 Tooth Star Ratchet Upgrade Kit Black One Size SR Hub Bushing Black 12mm Star Ratchet Grease Neutral <100ml SR1 Front Axle Silver QR SR1 Front End Caps Black QR SR1 Rear Axle Silver QR SR1 Rear End Caps Black QR SR Freehub Body - Campagnolo Black 9/10/11 Speed SR Freehub Body - Campagnolo 13 Speed Black 13 Speed SR Freehub Body - Shimano Black 9/10/11 Speed SR Freehub Body - XDR Black 12 Speed Prime Crash Replacement Programme At Prime we understand that a crash or unexpected accident may occur under normal riding conditions. If in the event of a fall or accident where your Prime product sustains damage beyond repair, you can return the damaged component in exchange for a new product at 40% off the RRP. Please note that the Prime Crash Replacement Programme is only valid for the original purchaser within 2 years of purchase.
Designed for the highest speed environments and modern tyre widths, the Ultegra C60 wheelset shares its all-carbon rim profile with Dura-Ace but employs a hub that is compatible with both 11 and 12-speed cassettes. For situations where aerodynamics is the priority, the new Ultegra R8170 C60 wheelset features an all-carbon, 21 mm internal, tubeless compatible rim and a super-fast cup and cone bearing hub that is compatible with both 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. 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.