The radical new look and feel of the SRAM X SYNC Eagle direct mount chainring is a result of SRAM drivetrain engineers studying the performance and wear characteristics of thousands of X-SYNC chainrings. It subjected every size of chainring to untold environmental and mechanical tortures, abuse and neglect, in both lab and real-world settings, to come up with a chainring that would augment the Eagle drivetrain's performance in all conditions. The longer, positive-rake tooth shape has been designed to work perfectly with the Eagle chain to increase chain retention and overall pedalling efficiency, while decreasing friction, noise and wear. Technologies: X-Sync 2: X-SYNC 2 Eagle is the next evolution of SRAM X-SYNC technology. The aggressive teeth design provides better chain retention for a smoother, more efficient pedal feel. With a focus on long wear-life, the X-SYNC Eagle design reduces friction and the accumulation of mud, grit and grime.
Alternative cable routing options allow for both brake and shifter cables to run along either side of the handlebar for optimum rider comfort. SRAM Rival also incorporates the popular reach adjust feature, which SRAM invented, and allows riders to customise their brake and shift levers. Now every rider has a choice on positioning their DoubleTap® levers. Weight: 320g Technologies: DoubleTap® shifting - this makes changing gears easier and faster, eliminating the cumbersome and awkward engagement associated with two-lever systems. DoubleTap handles up and downshifts in one short, sweeping motion, with minimal effort and maximum comfort no matter where you are on the bars. With short, rapid taps the transport pawl moves the ratchet wheel and up through the shifting range. Downshifting comes via a longer sweep of the lever (in the same inward direction you upshift, but to an ergonomically maximised 15° angle) with the holding pawl and the transport pawl leapfrogging each other quickly and smoothly. Exact Actuation™: When SRAM launched their road technology from scratch they reapplied their MTB proven SRAM 1:1 actuation ratio (shifter cable travel: derailleur movement) for 10 speed rear shifting. EA helps to simplify/stabilise the uneasy act of balancing rear derailleur hanger design, tight cog spacing and exact cable tension. The result: the easiest index shifting system to set up and it stays that way ZeroLoss™: Simply means, well, zero loss—when you push on the lever, for an upshift or down shift, the cable is engaged instantly—zero loss of movement. There is no middle ground where you're waiting for the shift to come. Gear changes are instant and precise
Fit for use with larger wheels and tyres up to 28c, this carbon-made rim brake is lightweight without compromising on leverage or strength to bring your speed down and your wheels to a halt. Streamlined and equipped with the AeroLink arm and a four-position quick release setup, it works gives a fearless and flawless performance as part of the SRAM RED eTap AXS groupset.
While mainly suited for cross country (XC) riders, the Guide RS Disc Brake is more than capable of tackling trail, all mountain (AM), enduro and freeride adventures due to its exception power-braking features and design. Equipped with such advances as SwingLink, which offers superbly quick and strong brake pad engagement, Heat Shield to keep your caliper fluid cool under extreme pressures and Reach Adjust, which puts your levers at your optimum reach and comfort, the Guide RS Disc Brake offers brilliant braking experience from a no-nonsense aluminium and stainless steel build and S4-piston design. Reach Adjust Brake lever fit and feel is a personal thing. Riders have individual positioning preferences, as well as unique hand sizes and finger lengths. Reach Adjust makes it easy to adjust your lever for maximum one-finger control for everyone. SwingLink Squeeze a new SRAM brake lever and you notice it immediately. Less deadband. More positive pad engagement. A new cam system requires less lever throw to push the pads toward the rotor. That’s great, but there’s more to perfect braking performance than just power. You need control. Many brake systems minimize deadband—but at the cost of modulation. SwingLink solves that with its special cam shape. When the pads contact the rotor, power is modulated, avoiding that “on/off” brake feel. It’s the perfect balance of power and precision. MatchMaker and MMX Compatible Save weight and clutter on the bar with Matchmaker. It holds Avid levers, SRAM triggers, and various RockShox controls, all with one tidy, light, clamp, it is a dream come true for handlebar component footprint conservationists the world over. Available in two versions: Matchmaker X integrates the RockShox XLoc and is compatible with XX and X0 brakes. Standard Matchmaker is also available and works with any split-clamp design and RockShox PushLoc. Please note: A clamp is not included with this item. Image is for demonstration purposes only. Technologies: PiggyBack Reservoir: The brake fluid reservoir on SRAM’s latest lever design is optimized for both performance and ease of use. The PiggyBack Reservoir offers a simple, failsafe way to manage brake fluid, and also allows for ambidextrous lever placement so you can switch your levers on the handlebar and run them moto without hassle. PURE Bladder: SRAM’s new brake lever design includes a reshaped bladder, called Pure, that helps regulate and reduce air bubbles. The bladder is specifically shaped to evacuate air from the lever and push the fluid exactly where it’s needed. The result is improved back-pressure relief, which produces dependable braking power and consistency. TPC Plus (Timing Port Closure): A hydraulic brake’s timing port is the connection between the reservoir and the master cylinder bore. When the lever is squeezed, a cup seal passes this area and closes the port, which pressurizes the system. SRAM’s new timing port closure system, called TPC Plus, features durable seals and an ultra-smooth cylinder bore finish producing dependable braking power and consistency. Bleeding Edge: Bleeding Edge technology makes bleeding brakes quick and simple. An updated fluid path and bleed porting make it easier to push fluid through the caliper. A dedicated bleed adapter plugs into the bleed port and seals the system to minimise air contamination and fluid loss. Heat Shield: The stainless-steel heat shields break the thermal connection between the pad and caliper body, reducing caliper fluid temperature by about 20C even in the most extreme testing conditions.
Featuring a tried and tested four-piston caliper for the smoothest single-finger control, the Guide R Disc Brake is packed with state-of-the-art braking technologies to give you top-end performance on every single ride. Constructed from forged aluminium, this durable and lightweight disc brake can be positioned to your preferred distance using the Reach Adjust attachment system, letting you set it at the most comfortable point on your bar for your hand. As a result, you'll enjoy a more rider-tuned feel as you conquer your way from trail to trail. MTB Disc Brake with DirectLink Lever Other technology in the Guide R includes the DirectLink lever design that gives precise control with every squeeze and the PiggyBack brake fluid reservoir which gives excellent brake fluid management. Working perfectly in tandem with other SRAM components and designed for use on cross country (XC), trail, all mountain (AM) and free ride (FR) bikes, the Guide R Disc Brake is an excellent choice of disc brake from SRAM. Reach Adjust Brake lever fit and feel is a personal thing. Riders have individual positioning preferences, as well as unique hand sizes and finger lengths. Reach Adjust makes it easy to adjust your lever for maximum one-finger control for everyone. MatchMaker and MMX Compatible Save weight and clutter on the bar with Matchmaker. It holds Avid levers, SRAM triggers, and various RockShox controls, all with one tidy, light, clamp--a dream come true for handlebar component footprint conservationists the world over. Available in two versions: Matchmaker X integrates the RockShox XLoc and is compatible with XX and X0 brakes. Standard Matchmaker is also available and works with any split-clamp design and RockShox PushLoc. PiggyBack Reservoir The brake fluid reservoir on SRAM’s latest lever design is optimized for both performance and ease of use. The PiggyBack Reservoir offers a simple, failsafe way to manage brake fluid, and also allows for ambidextrous lever placement—so you can switch your levers on the handlebar and run them moto without hassle. PURE Bladder SRAM’s brake lever design includes a reshaped bladder, called Pure, that helps regulate and reduce air bubbles. The bladder is specifically shaped to evacuate air from the lever and push the fluid exactly where it’s needed. The result is improved back-pressure relief, which produces dependable braking power and consistency. SwingLink Squeeze a SRAM brake lever and you notice it immediately. Less deadband. More positive pad engagement. A new cam system requires less lever throw to push the pads toward the rotor. That’s great, but there’s more to perfect braking performance than just power. You need control. Many brake systems minimize deadband—but at the cost of modulation. SwingLink solves that with its special cam shape. When the pads contact the rotor, power is modulated, avoiding that “on/off” brake feel. It’s the perfect balance of power and precision.
SRAM MTH 716 on WTB ST i35 TCS Front WheelThis high-quality mountain bike (MTB) front wheel combines a WTB ST i35 TCS rim with a SRAM MTH 716 hub for a fast, balanced and smooth-rolling trail-riding experience.WTB ST i35 TCS RimFeaturing a hard-wearing aluminium alloy construction, this rim is constructed to deliver maximum strength and durability while also keeping weight to a minimum. WTB has also equipped it with a 35mm inner rim width for stable and efficient rolling performance, whatever the trail throws at you.TCS 2.0 TechnologyBuilt upon WTB's proven Tubeless Compatible System, TCS 2.0 introduces a more robust, easily installed, and dependable tubeless system. A recessed channel along the centre of TCS 2.0 rims allows installation of the all-new Solid Strip, which prevents tubeless tape from sagging at the spoke holes and results in a smooth, consistent interface between the tyre and rim. Once the Solid Strip is installed, TCS Tape is then applied to provide the airtight seal needed for a reliable tubeless system.SRAM MTH 716 HubComing equipped with a strong aluminium hubshell with machined flanges, this front hub offers an excellent low weight without compromising durability. Designed for use with 15x110mm Boost spaced axle standards, this model ensures maximum stiffness, responsiveness and rotative performance when tackling rough and tumble trails.Features: Rim Material: Aluminium Alloy Axle Size: 15x110mm, Boost Use: Mountain Bike (MTB) Wheel Size: 27.5" ETRTO: 35-584 Inner Rim Width: 35mm Rim Type: WTB ST i35 Hub Type: SRAM MTH 716 Brake Type: Disc brake only Tubeless Ready: Yes, TCS 2.0 Recommended Tyre Section Width: 47-72mm Type: Clincher Spoke Count: 32 Single or Pair: Single front wheelManufacturer's Part Number: 46-19363 Black 27.5" Front 15x110mmBuy SRAM Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM MTH 716 on WTB ST i25 TCS Front WheelThis trail-ready front wheel combines a WTB ST i25 TCS rim with a SRAM MTH 716 hub for fast and smooth-rolling performance, whether you're racing or exploring.WTB ST i25 TCS RimBenefitting from a rock-solid aluminium alloy construction, this model's rim is tough and durable, making it more than capable of handling all the demands associated with gravel and cross country riding disciplines. WTB has also kitted out this version with a 25mm inner rim width for fast, stable and smooth-rolling performance across mixed terrain conditions.TCS 2.0 TechnologyBuilt upon WTB's proven Tubeless Compatible System, TCS 2.0 introduces a more robust, easily installed, and dependable tubeless system. A recessed channel along the centre of TCS 2.0 rims allows installation of the all-new Solid Strip, which prevents tubeless tape from sagging at the spoke holes and results in a smooth, consistent interface between the tyre and rim. Once the Solid Strip is installed, TCS Tape is then applied to provide the airtight seal needed for a reliable tubeless system.SRAM MTH 716 HubComing equipped with a strong aluminium hub shell with machined flanges, this front hub offers an excellent low weight without compromising durability. Designed for use with 15x110mm Boost spaced axle standards, this model ensures maximum stiffness, responsiveness and rotative performance when tackling rough gravel roads, forest paths and light trails.Features: Rim Material: Aluminium Alloy Axle Size: 15x110mm, Boost Use: Cross Country (XC), Gravel Wheel Size: 29"/700c ETRTO: 25-622 Inner Rim Width: 25mm Rim Type: WTB ST i25 Hub Type: SRAM MTH 716 Brake Type: Disc brake only Tubeless Ready: Yes, TCS 2.0 Recommended Tyre Section Width: 35-70mm Type: Clincher Spoke Count: 32 Single or Pair: Single front wheelManufacturer's Part Number: 46-19378 Black 29" Front 15x110mmBuy SRAM Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM Rival 10 Speed Gear Shift LeverDesigned using the finest of SRAM's DoubleTap® technology, the Rival 10 Speed Gear Shift Lever boasts an exceptional output that'll put you ahead of the rest. This component benefits from one lever for shifting and a separate lever for controlled braking. Alternative cable routing options allow for both brake and shifter cables to run along either side of the handlebar for optimum rider comfort. SRAM Rival also incorporates the popular reach adjust feature, which SRAM invented and allows riders to customise their brake and shift levers. Now every rider has a choice on positioning their DoubleTap® levers.Features: Use: Road, Time Trial, Touring, Cyclocross Material: Carbon Fibre brake lever, Aluminium shift lever Brake Levers/Gear Shifters: SRAM Rival Speed: 10-Speed Cable Pull Ratio: Exact actuation Weight: 320gTechnologies: DoubleTap® shifting - this makes changing gears easier and faster, eliminating the cumbersome and awkward engagement associated with two-lever systems. DoubleTap handles up and downshifts in one short, sweeping motion, with minimal effort and maximum comfort no matter where you are on the bars. With short, rapid taps the transport pawl moves the ratchet wheel and up through the shifting range. Downshifting comes via a longer sweep of the lever (in the same inward direction you upshift, but to an ergonomically maximised 15° angle) with the holding pawl and the transport pawl leapfrogging each other quickly and smoothly. Exact Actuation™: When SRAM launched their road technology from scratch, they reapplied their mountain bike (MTB) proven SRAM 1:1 actuation ratio (shifter cable travel: derailleur movement) for 10 speed rear shifting. EA helps to simplify/stabilise the uneasy act of balancing rear derailleur hanger design, tight cog spacing and exact cable tension. The result: the easiest index shifting system to set up and it stays that way ZeroLoss™: Simply means, well, zero loss—when you push on the lever, for an upshift or down shift, the cable is engaged instantly—zero loss of movement. There is no middle ground where you're waiting for the shift to come. Gear changes are instant and preciseBuy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM eTap BlipsAdjust your gears with just the touch of a button, thanks to the eTap Blips from SRAM. Designed for use with Time Trial (TT) bikes or eTap shifters on triathlon bikes, these handy gadget does all the hard work for you, without you needing to change your riding position. Features:Compatible With: SRAM RED® eTap shift/brake controls, BlipBox Aero cockpit control, SRAM 11-Speed compatibleMultiple mounting options for drop and aero barsWire Length: 150mm, 230mm, 450mm, 650mmPart No: ES-EAC-BLIP-A1Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
SRAM Maxle Ultimate Front MTB - 15x110 - Length 156.5mm - Thread Length 9mm - Thread Pitch M15x1.50 - PIKE - Lyrik B1 - Yari Boost CompatibleBasic things like axles are often the easiest to overlook. Put one hand on the Maxle Ultimate, though, and you’ll be glad we paid serious attention to the finer details. Because one hand is all it takes to remove or install the Maxle Ultimate. And lever-placement personalization is accomplished completely without the use of tools. Available for both front and rear, Maxle Ultimate is the easiest-to-operate axle system in the world. No tools, no worries, so you can concentrate on the trail ahead.Internal Cam system,High Clamping force.
SRAM CenterLine X Ti Rounded Road Bike RotorAccurately constructed and machined to meet the UCI standards, SRAM has packed some of its best features into its CenterLine X Ti Rounded disc brake rotor. Specifically designed for road bike racing, it ensures your brakes run smoothly and reliably. The edges have been rounded to make it run quieter, increase safety and make wheel installation easier. With an alloy central spider, steel brake track and titanium bolts on the 6-bolt model, this lightweight rotor brings you increased brake performance without adding any unnecessary extra weight.Features: Brake Compatibility: All SRAM Road/Gravel/Adventure bike brakes such as Red, Rival and Force Mount Type: Separate 6-bolt or Center Lock options Lightweight, two-piece design Rounded edges are UCI-compliant and allow for easier wheel installs 6-bolt version comes with lightweight titanium bolts Weight: 140mm: 86g (approx.); 160mm: 102g (approx.); 180mm: 125g (approx.) Please Note: To use the 160mm or 180mm sizes, most road/gravel/adventure bikes will need additional "flat mount" or "post mount" caliper mount adaptors (sold separately)Manufacturer Part Numbers:140mm 6 Bolt: 00.5018.037.017160mm 6 Bolt: 00.5018.037.019180mm 6 Bolt: 00.5018.037.021160mm Centre Lock: 00.5018.037.023180mm Centre Lock: 00.5018.037.024 Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
When it comes down to performance and durability the new Rival 22 rear derailleur matches the top end Force and Red derailleurs with the only difference being a slight weight difference. The derailleur is constructed from an aluminium inner and outer cage as well as an aluminium b-knuckle. Using Exact Actuation, each gear shift is fast and accurate, with the redesigned AeroGlide jockey wheels keeping things quiet and smooth.
Strong and lightweight to cope with the demands of rigorous riding, this Eagle DUB chainset is designed to be durable and stiff, with every part of the crankset working together to ensure efficient and effective performance with every rotation. Utilising the aggressively toothed X-Sync 2 chainring, the aluminium-built spider keeps a superb hold on your chain and provides a smooth feel as you propel yourself to greatness. The 7000 series aluminium crank arms allow for explosive power transfer as you rise uphill and sprint along the straight, with the wider BOOST design chainline allowing you to make the most of your larger frame and tyres to push your off-road rides to the very limit. Technologies X-Sync 2: X-Sync 2 Eagle is the next evolution of SRAM X-Sync technology. The aggressive tooth design provides better chain retention for a smoother, more efficient pedal feel. With a focus on long wear-life, the X-Sync Eagle design reduces friction and the accumulation of mud, grit and grime. DUB Technology: The relationship between bottom bracket spindle and bearing is the core of DUB™ technology. It’s where stiffness meets durability. SRAM took it a step beyond conventional thinking and made everything simpler, by better integrating the relationship between chainring, crank, spindle and bottom bracket. It’s this clear system approach that equals better drivetrain performance.
Features:SRAM X-SYNC wide-tooth, narrow-tooth chainring technology provides maximum chain control,Laser-etched chainring finish is more durable,X-Range gearing technology gives you more range and a smoother gear progression, so you're always in the right gear,Improved aerodynamics for time trial and triathlon (48T/50T).Specifications:Chainring Size: 38T, 40T, 42T, 44T, 46T, 48T, 50T,Bolt Circle Diameter (BCD): Direct Mount (DM),Speeds: 12,Compat - Yaw: N/A,Material (Chainring): Aluminum,Color (Chainring): Black, Grey.
As a front lever for your Rival 1 set-up, or paired for single speed adventures, the new Rival brake lever features the same ErgoFit ergonomic design introduced on SRAM RED but delivered in a sleek, forged aluminum offer.SRAM Reach Adjust feature brings near universal fit for riders.
When you choose to ride, advancement means having a group that's always ready. Apex 1® is that group. As a left lever for your Apex® 1 setup, or paired for single speed adventures, the new Apex® mechanical brake lever features the same ErgoFit™ ergonomic design introduced on SRAM RED® but delivered in a sleek, forged aluminum offer.FEATURESErgoFit™ design from SRAM RED® improves grip and finger wrap,Reach Adjust for a perfect fit,Durable, forged aluminum lever blade with laser texture for a positive touch,Brake-only lever.
SRAM Road 50 teeth 4 mm chainring are stamped from 7075-T6 aluminium with black hard anodized finish. Middle rings have PowerGlide ramps, outer rings have PowerGlide pins/ramps. Number of bolts: 5. 130 mm bolt circle diameter.Low weight and excellent strength,Made of 7075-T6 aluminium,Middle rings have PowerGlide ramps, outer rings have PowerGlide pins/ramps,Black hard anodized finish,130 mm Bolt circle diameter.
SRAM’s Apex 1 drivetrain gives the gear range and the shifting simplicity to let you simply go where you want. The Apex 1 rear derailleur makes that gearing choice a reality with clean, crisp shifts, thanks to SRAM’s X-Horizon™ geometry and our Roller Bearing Clutch™.X-HORIZON™ design reduces shift force, eliminates ghost shifting and chain slap,Compatible with 10-speed and 11-speed SRAM 1x™ road systems,With CAGE LOCK™ technology, wheel removal and installation are easier than ever,Equipped with Roller Bearing Clutch™,Large upper pulley offset automatically adjusts chain gap,Long cage fits up to a 42 tooth cog.CAGE LOCK™With CAGE LOCK™ technology in the rear derailleur, wheel removal and installation—as well as chain installation—becomes faster and simpler. Just pushing the cage forward to create slack and lock it into place.SpecificationsWeight: 314gColors: BlackOuter Cage: SteelCompatibility: 10-speed and 11-speed SRAM 1x™ road systemsInner Cage: SteelCage Sizes: LongMax Tooth: 42tPulleys: Sealed cartridge bearingsPull: EXACT ACTUATION™
The PG-1130 Cassette offers a super wide gear range with a ratio of 11-42T, perfect for any ride. Compatible with all SRAM 1x drivetrains and non XD Driver Bodies the PG-1130 is a great option for all styles of odd-road riding. Featuring JET Technology, the cassette looks great and offers improved corrosion resistance. Gear Ratio: 11-42TSpeed: 11-SpeedCompatibility: All SRAM 1x Drivetrains, Non XD Driver BodyWeight: 538g
SRAM Guide RSC Disc BrakeThe SRAM Guide RSC Disc Brake delivers exceptional control and stability. Thanks to the modulated braking feel of the SRAM lever design, the Guide RSC boosts rider-confidence as it provides you with braking consistency and fine-tuned accuracy that is matched by only a few other high-end disc brakes.Exceptional Braking Power and ModulationThe new SwingLink technology provides even more power and modulation than ever before. The braking performance is super-powerful when needed and silky-smooth throughout the lever stroke, ensuring you have steep trail confidence, fast-flowing entry and exit of corners and powerful, predictable braking on demand when the trail gets rough. The Guide RSC is an exceptional brake, suited to any level of riding in any trail or weather condition. Material: Body, Lever, Hardware: Aluminium Caliper Design: 4-piston dual diameter Recommended Rotor type: SRAM Centerline Fluid: DOT 5.1 Mount: Ambidextrous Adjustment: Tool-free Reach Adjust, Contact Point Adjust, Banjo Adjust Special Features: MatchMaker X compatible, Piggyback Reservoir, BendZone Technology Highlight(s): TPC Plus, DirectLink, SwingLink, PURE Bladder Pad Holder: Top-loading Intended Use: Trail, All Mountain, Freeride System: Open System Tri-Align Caliper Positioning System: No Tool-Free Pad Replacement: YesPlease note: Rotor NOT included Weight: 317gPlease Note: The lever and hose is fully bled and ready to cut, mount and then take for a ride. For your convenience and so you can easily get the correct hose sizing for your bike, the brake hose is not connected at the lever side.Technologies: Contact Point Adjustment: Some people like the instantaneous power of a short lever throw. Others prefer the feel of a longer throw. With Contact Point Adjust, you can pick the position you want your fingers to be in when your brakes are engaged. It's a quick and easy way to customize the feel of your brakes without having to move the pads. It's also a way to balance both brake levers to feel exactly the same. MatchMaker and MMX Compatible: Save weight and clutter on the bar with Matchmaker. It holds Avid levers, SRAM triggers, and various RockShox controls, all with one tidy, light, clamp, it is a dream come true for handlebar component footprint conservationists the world over. Available in two versions: Matchmaker X integrates the RockShox XLoc and is compatible with XX and X0 brakes. Standard Matchmaker is also available and works with any split-clamp design and RockShox PushLoc. PiggyBack Reservoir: The brake fluid reservoir on SRAM's latest lever design is optimized for both performance and ease of use. The PiggyBack Reservoir offers a simple, failsafe way to manage brake fluid, and also allows for ambidextrous lever placement so you can switch your levers on the handlebar and run them moto without hassle. PURE Bladder: SRAM's new brake lever design includes a reshaped bladder, called Pure, that helps regulate and reduce air bubbles. The bladder is specifically shaped to evacuate air from the lever and push the fluid exactly where it's needed. The result is improved back-pressure relief, which produces dependable braking power and consistency. Reach Adjust: Brake lever fit and feel is a personal thing. Riders have individual positioning preferences, as well as unique hand sizes and finger lengths. Reach Adjust makes it easy to adjust your lever for maximum one-finger control for everyone. SwingLink: Squeeze a new SRAM brake lever and you notice it immediately. Less deadband. More positive pad engagement. A new cam system requires less lever throw to push the pads toward the rotor. That's great, but there's more to perfect braking performance than just power. You need control. Many brake systems minimize deadband—but at the cost of modulation. SwingLink solves that with its special cam shape. When the pads contact the rotor, power is modulated, avoiding that “on/off” brake feel. It's the perfect balance of power and precision. TPC Plus (Timing Port Closure): A hydraulic brake's timing port is the connection between the reservoir and the master cylinder bore. When the lever is squeezed, a cup seal passes this area and closes the port, which pressurizes the system. SRAM's new timing port closure system, called TPC Plus, features durable seals and an ultra-smooth cylinder bore finish producing dependable braking power and consistency.Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.