CeramicSpeed OSPW System R9250/R8150The OSPW System R9250/R8150 from CeramicSpeed is an oversized pulley wheel system that is designed and engineered to enhance gear shifting accuracy, efficiency and speed. This version is specifically designed for use with Shimano Dura-Ace 9200 and Ultegra 8100 systems.Chosen by World Champions and top athletes around the world, the CeramicSpeed Oversized Pulley Wheels System has been proven to be the fastest pulley system in the world. Featuring an industry-leading design, this limited-edition model is for Shimano Dura-Ace 9200 and Ultegra 8100 systems with an integrated stop tower for simple installation and durability.This OSPW System has hand built CeramicSpeed Bearings installed in each pulley and it comes with a four-year CeramicSpeed warranty as standard and a lifetime CeramicSpeed warranty when choosing coated bearings (please choose option from the menu).Since its introduction in 2015, the CeramicSpeed Oversized Pulley Wheel System has been through 13 unique derailleur compatibility developments. No other pulley system has the depth of use and trust as the CeramicSpeed OSPW, which counts both Men's and Women's Triathlon World Champions, World Tour professional road teams, XCO professional MTB Teams, and elite athletes worldwide as its users. CeramicSpeed Shimano R9250/R8150 OSPW SystemFeaturing a 13-tooth upper pulley wheel and a 19-tooth lower pulley wheel to provide absolute optimisation of the rear derailleur. The upper and lower oversized aluminium pulley wheels come fitted with either standard or coated CeramicSpeed Bearings. Please Note: While there are visual similarities in the 9100 Series OSPW and 9200 Series OSPW, the spring tension settings, rotation stop tower placement, and mounting pin depth are slightly repositioned and as such the systems are not cross-compatible. For 8100 derailleurs, the cage uses the factory derailleur body washer. 9200 derailleurs will require the new included derailleur body washer. Features: Pulley Wheel Material: Aluminium Use: Road Pulley Wheels: CeramicSpeed 13-tooth upper and 19-tooth lower Bearing Options: CeramicSpeed Standard or Coated (choose from the menu) Compatibility: Shimano Dura Ace 9200 and Ultegra 8100 Included: CeramicSpeed Bearing Oil in 15ml dropper bottleTechnologies: The overall power savings of the OSPW System for Shimano Dura-Ace 9200 and Ultegra 8100 reach 30%-60%, or more in some cases, over a stock setup The oversized pulley wheels have 3-5 times longer lifetimes than the commonly used standard pulleys on the marketBuy CeramicSpeed Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
The Shortcut V2 frame features the shortest chainstay in BMX coming in at 12.4". Designed with an investment cast chainstay yoke, Fit were able to shorten the rear-end while retaining maximum tyre clearance. While the Shortcut is one of the most responsive frames on the market, it is also one of the most reliable. Investment cast dropouts with integrated chain tensioners are designed for heavy peg use without weld failures or wheel movement. The Shortcut V2 comes in shorter top tube lengths and features a lower standover height. The Shortcut V2 is ideal for tech riders, anyone that wants to make learning new tricks a little easier, and riders looking for a slightly smaller and nimbler frame. ###section### Product Specs MATERIAL: Chromoly HEAD TUBE ANGLE: 75.5° SEAT TUBE ANGLE: 71° CHAIN STAY LENGTH: 12.4" BB HEIGHT: 11.7" WHEEL SIZE: 20" STANDOVER HEIGHT: 9" DROPOUT SIZE: 14mm HEADSET TYPE: Intergrated BB TYPE: Mid BRAKE MOUNTS: Removable (Sold separately) GYRO TABS: None WEIGHT: 4.72 lb (2.14 kg) ###section### Product Highlights Responsive Geometry with Short Backend and Steep Headtube Best suited to Street and Park riding High-quality Chromoly construction Strong and durable investment cast chainstay yoke Built in chain tensioners ###shogun-image-section###
Campagnolo Record EPS 11sp Rear DerailleurAs with the mechanical parts, the rear derailleur represents the pride and joy of the EPS project and encompasses a series of technologies and innovations that allow shifting speed to be optimised and guarantee unprecedented precision, even in the case of multiple shifting with 11 sprockets at a time.The EPS rear derailleur is comprised mainly of a mechanical structure, derived from the mechanical gear and composed of a derailleur rod/parallelogram/derailleur cage, of a worm screw enabled by an electronic actuator. As with the derailleur, the electronic rear derailleur actuator is composed of a gear motor and a sensor, the built-in resolver, that reads its movements. The geometry of the parallelogram has been made more rigid and optimised to promote interaction with the electronic parts. The lower and upper bodies, the parallelogram and the carbon derailleur cage are moved by a screw system and lead worm screw (not a spring screw) which, in turn, is enabled by the electronic actuator that communicates with the DTI. The built-in resolver inside the actuator is capable of reading the movements of the rear derailleur at any time and optimising its position by communicating with the DTI (Digital Tech Intelligence). The rear derailleur is also equipped with a play recovery system using a helicoidal spring that optimises stability and precision and keeps operation and performance constant over time, even after many kms have been covered. As with the mechanical rear derailleur, it is possible to optimise its position with respect to the frame and chain by acting on two adjusting screws: the screw that adjusts the mechanical end stop and the screw that adjusts the distance between the upper pulley and sprockets. By using these screws it is possible to optimise the installation of the rear derailleur and increase the precision of its operation.DTI: Digital Tech Intelligence is housed inside the Power Unit and it continuously monitors the signals that arrive from all the EPS components, thus managing their operation.Multi-Shifting: There are no longer any limits to Multi-shifting and the choice is at the fingertips of the cyclist.Ride Back Home: The uncoupling mechanism of the rear derailleur is useful if the battery runs out "on the road", allowing you to manually "uncouple" the rear derailleur to position it on which ever sprocket you require.Water Proof: In order to achieve the IP67 classification, all the electronic components of the EPS system underwent a series of tests, which proved their ability to function perfectly under one meter of water for at least 30 minutes.WARNING - All connection, installation, removal and adjustment operations of the EPS drivetrain must only be carried out by a Campagnolo Service Center, a Campagnolo Pro Shopor a mechanic specializing in the installation of EPS systems. Any Tampering with or incorrect or incomplete installation of any part of the EPS system will automatically void the warranty.NOTE FOR SPECIALISED MECHANICS - Please remember that all assembly, disassembly, adjustment and maintenance procedures for the EPS drivetrain are described in the EPS technical manual, which is available in PDF format on their internet site www.campagnolo.com.Buy Campagnolo Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
Shimano Dura-Ace R9150 Di2 11sp Rear DerailleurCombining the very best of Shimano’s electronic shifting technologies with its race-proven mountain bike “Shadow” cage design, the Dura-Ace R9150 Di2 road bike rear derailleur shifts in an instant and has enhanced aerodynamics. The updated cage position means it rests directly under your frame’s chainstay, reducing drag and protecting it in the event of an unfortunate racing incident.The Shadow design also offers faster wheel changes thanks to the fact that it moves the derailleur out of the way of the dropouts. It also offers faster and more precise shifting than ever before. Shimano's 9150 groupset brings its Syncro-Shift technology to the road too. Syncro-Shift technology enables the front derailleur to read the position of the rear derailleur. The front shift is then automatically operated to position the gears in the most efficient gear and best chain line. This means you'll never have to worry about front shifting and correction shifts again.Features: Speed: 11-Speed Compatibility: Shimano Di2 road shifters (Dura-Ace and Ultegra with E-tube connection) Maximum Low Gear Sprocket: 30T (Minimum 25T) Minimum High Gear Sprocket: 11T (Maximum: 14T) Maximum Front Difference: 16T Total Capacity: 33T Mount Type: Standard hanger mount Clutch Type: No Ergonomic shifting operation without stress Shimano synchronised shift Low profile rear derailleur design Shimano Shadow cage design Race endurance for less damage in a crash Maintains compact and smooth appearance Manufacturer's Part Number: RD-R9150 Weight: 204gA 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.
SRAM RED eTap AXS 12sp Rear Derailleur Exploring new limits has never been easier with this AXS enabled rear derailleur that's specifically developed for the demands of modern road cycling. It features a high-quality carbon cage material for fantastic strength and durability, without adding any unnecessary weight to your bike. Thanks to its AXS wireless technology, it offers easy personalisation, while its advanced chain management keeps it silence and secure no matter the terrain. Another highlight is it comes with faster pulleys, bearings, motors and signals to improve speed in every way and ensure you're always in the right gear.AXS Enabled Rear DerailleurControl. Personalize. Monitor. AXS is SRAM’s bike component integration system that takes eTap wireless shifting to the next level. The SRAM AXS app allows riders to see battery status, change component behaviour, personalise controls, get maintenance reminders, and update firmware.Super Smooth Orbit TechnologyOn tarmac or gravel, 1x or 2x, eTap AXS gives a quiet, secure, and smooth ride. Thanks to the ultra-lightweight Orbit fluid damper, you’ll ride more confidently and efficiently than ever, no matter the terrain.X-Range Modern GearingRoad bikes are faster and more capable than ever before, and riders are expanding what’s possible with drop bar bikes. X-Range offers wider range, more useful and smoother gear progression, as well as smarter shift settings, enabled by AXS.Features: Cage Material: Carbon Pulley Bearings Material: Ceramic Use: Road Speed: 12 speed Cage Size: Short Cage Max Tooth: 33T Battery Included: No, available separatelyTechnologies: X-SYNC: SRAM X-SYNC 1x chainrings provide the highest level of performance and durability. The SRAM X-SYNC tall square teeth edges engage the chain earlier than traditional triangle shaped teeth. The sharp and narrow tooth profile, as well as rounded chamfer edges, help manage a deflected chain. To provide the best possible performance in muddy conditions, the X-SYNC chainrings have been designed with mud-clearing recesses for the inner chain links and rollers. Engineered in Germany, X-SYNC rings are an integral part of the SRAM 1x drivetrain. Accept no imitation. eTap: All of the underlying tech in our new SRAM RED eTap groupset, such as wireless shifting, advanced battery power management, and mechatronics technologies, are meant to serve one ultimate purpose: to facilitate the most intuitive and consistent shifting available. This shift logic is called eTap. Right lever makes it harder, left lever makes it easier, both levers shift the front derailleur. Simple, unmistakable, and intuitive. Orbit: Orbit technology is an innovative new form of derailleur motion control. It utilizes silicon fluid as part of an elegant and ultra-lightweight damper system. Compared to a standard friction clutch system, Orbit technology places no additional resistance on the rear derailleur’s spring when under slow or light movement. This means easier shifting and rear wheel removal. And while riding, the fluid damper reduces chain bounce. It’s rock-solid reliability for both 1x and 2x systems. AXS: AXS is SRAM’s new bike component integration system that connects electronic bicycle components and software. The SRAM AXS app allows riders to see battery status, change component behavior, personalize controls, get maintenance reminders, and update firmware. X-Range: Road bikes are faster and more capable than ever before, and riders are expanding what’s possible with drop bar bikes. X-Range is gearing for today’s road riding. We completely reimagined road gearing for wider range, more useful and smoother gear progression, as well as smarter shift settings—enabled by AXS. With X-Range, you’re always in the right gear.Manufacturer's Part Number: 00.7518.120.000Buy SRAM Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
Manitou Dorado Comp Suspension ForkFeaturing a robust 6000 series aluminium leg construction, this mountain bike (MTB) suspension fork delivers tough and dependable performance as you charge down the trail. Coming kitted out with Boost axle spacing, it also ensures stiffer, stronger and more efficient handling when dominating your way across challenging terrain conditions. Benefitting from post most disc brake rotor compatibility, it offers reliable front-end suspension performance in combination with your powerful and consistent braking set-up.Inverted Design and 37mm StanchionsInverted forks provide an incredibly smooth and consistent feel due to the constant lubrication of the bushings and seals. Inverted forks also provide a major increase in fore-aft stiffness with much longer bushing overlap compared to traditional fork designs while maintaining torsional compliance which provides more control to the rider over rough trail sections. 37mm proved to be the perfect balance of increased stiffness, weight savings, and an ideal seal surface area for reduced friction. Compared to the previous 36mm version of the Dorado, the updated 37mm alloy increased in stiffness at 20% for both fore-aft and torsionally when compared to the former 36mm. Dorado Comp is also electric bike (E-bike) certified.Coil Spring and Absolute Plus (ABS+) DampingReady for fast and intense rides, this model is equipped with a coil spring for maximum bump sensitivity and simple service procedures. Known for its incredible reliability and easy tuning, its Absolute Plus (ABS+) damper is a shim stack based damper that features external incremental Low Speed compression adjustment. The piston and shim stack are adaptable for a wide range of riding styles.Coil Fans Rejoice!Once again, the Dorado is available with a coil option. The updated Dorado Comp features the same 37mm chassis as the Expert, but with a more set it and forget it vibe. The coil spring provides a smooth consistent feel 100% of the time with 0% of any hassle. On the damping side of things, our ABS+ Damper offers a great adjustment range, terrific reliability, and easy serviceability. The Manitou Dorado Comp Suspension Fork is built for riders who just want to ride and not sweat any of the small stuff.Features: Legs Material: 6000 Series Aluminium Legs Diameter: 37mm Use: MTB Axle: 110x20mm Boost Thru Axle Steerer: 1-1/8" Straight Spring: Coil (5 rates available) Compression Damping: Absolute Plus (ABS+) Rebound Damping: Cartridge Adjustable TPC Adjustments: LS Compression, Rebound, Spring Preload, Spring Rate Wheel Size: Multiple options available to select Offset: 47mm Flat Crown (27.5" Option); 57mm Drop Crown (29" Option) Ride Height: 582mm (27.5" Option); 602mm (29" Option) Travel: 203mm Crown: Forged Brake Post Mount: 203mm (223 Max) Max Tyre Size: 67mm Extras: Threaded TSR Options: Fender E-Pac: Yes Weight: 3600g (Firm Spring)Technologies: 37mm Chassis results in a massive increase in stiffness and ride quality. The updated chassis is 20% stiffer compared to the brand's former 36mm version. Inverted Design provides an incredibly smooth and consistent feel due to constant lubrication of the bushings and seals. The inverted design also provides a major increase in fore-aft stiffness compared to traditional forks while maintaining torsional compliance which provides more control to the rider over rough terrain. Coil Spring provides maximum bump sensitivity and simple service procedures. The standard spring rate provided in the fork is a medium rate of 35lb/in. For tuning, there are six spring rates available for this fork; 25lb/in, 30lb/in, 35lb/in, 40lb/in, 45lb/in, 50lb/in. ABS+ damper is known for its incredible reliability and easy tunability. Adjustments include a low-speed compression adjust and low-speed rebound adjustment. Fits both 29" and 27.5" wheels. Markings on the outer legs indicate the proper clamping point for ideal axle to crown measurements depending on wheelsize. The fork legs can be used with both wheel sizes. Two Crown Options are available with this fork. The 47 offset is designed to work with 27.5" wheels and intended axle to crown. The 57 offset crown is designed for 29" wheels and axle to crown. For those looking to run the lower offset crown with 29" wheels please reference our fit document to see if your headtube length is compatible. TSR Bleed Screws allow you to release excess pressures built up in the outer legs of your fork while riding keeping your fork smooth and supple all day long.Manufacturer's Part Numbers: 191-37873-A101 Black 27.5" 203mm 191-37873-A201 Black 29" 203mmBuy Manitou Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
Manitou Dorado Expert Suspension ForkFeaturing high-quality 6000 series aluminium legs, this mountain bike (MTB) suspension fork is robust and reliable as you charge from trail to trail. Manitou has also equipped this model with Boost axle spacing for stronger, stiffer and more efficient performance, wherever your next mountain adventure takes you. Benefitting from 203mm travel that's also internally adjustable, it allows you to tweak it for a more rider-tuned feel. Coming kitted out with post mount disc brake rotor compatibility, you'll enjoy its dependable front end suspension performance combined with powerful and consistent braking.Dorado Air Spring and TPC+ Compression DampingReady for wherever the trail leads you, this MTB fork is equipped with a wide range of adjustment features for a more customised feel on your bike. Its Dorado Air air spring with Incremental Volume Adjust (IVA) offers a consistent feel without any flat or dead spots. Another highlight is its TPC+ compression damping with Hydraulic Bottom Out (HBO), which delivers improved bump compliance, increased consistency as well as a smooth and predictable feel for every impact. With high-speed compression, low-speed compression plus, low-speed rebound adjustments, this is a great choice of upgrade for dialling in your ideal settings to match your riding style as well as the terrain.Get InvertedBack and better than ever the updated Dorado Expert is ready to take on the gnarliest conditions mountain biking can provide. Whether you're looking to cut seconds off the splits, lap the local park, or get sendy in the back hills of Utah, the Dorado Expert has you covered. Featuring a revised 37mm chassis, completely redesigned internals, and on-trail precision that only inverted forks can provide, the Manitou Dorado Expert Suspension Fork is your ticket to the best ride you've ever had.Features: Legs Material: 6000 Series Aluminium Leg Diameter: 37mm Use: Mountain Bike (MTB) Axle: 110x20mm Boost Thru Axle Steerer: 1-1/8" Straight Air Spring: Dorado Air with Incremental Volume Adjust (IVA) Compression Damping: TPC+ with Hydraulic Bottom Out (HBO) Rebound Damping: Cartridge Adjustable TPC Adjustments: Air, Air Volume, Rebound, HS and LS Compression Crown: Forged Brake Post Mount: 203mm (223 Max) Max Tyre Size: 67mm Extras: Threaded TSR E-Bike Compatible: Yes Offset: 47mm (27.5" Option); 57mm (29" Option) Ride Height: 582mm (27.5" Option), 602mm (29" Option) Travel: 203mm internally adjustable Weight: 3120gTechnologies: 37mm Chassis results in a massive increase in stiffness and ride quality. The new chassis is 20% stiffer compared to our former 36mm version. Inverted Design provides an incredibly smooth and consistent feel due to constant lubrication of the bushings and seals. The inverted design also provides a major increase in fore-aft stiffness compared to traditional forks while maintaining torsional compliance which provides more control to the rider over rough terrain. Dorado Air Spring system contains a unique balancing valve that equalizes the positive and negative air chambers during the air fill process resulting in a consistent feel without any flat or dead spots. It also allows easy Travel Adjustability from 180 to 190 and 203mm without the need for any spare parts. IVA (Incremental Volume Adjust) modifies the volume in the positive air chamber with self contained spacers dictating the position of the IVA piston and your volume amount. TPC+ Damper has increased oil volume and improved flow paths for improved bump compliance and increased consistency. TPC+ features two compression pistons, a hydraulic bottom out, and a spring backed IFP for a smooth and predictable feel for every impact. Adjustments include; High-speed compression, Low-speed compression, and Low-speed rebound. Fits both 29" and 27.5" wheels. Markings on the outer legs indicate the proper clamping point for ideal axle to crown measurements depending on wheelsize. The fork legs can be used with both wheel sizes. Two Crown Options are available with this fork. The 47 offset is designed to work with 27.5" wheels and intended axle to crown. The 57 offset crown is designed for 29" wheels and axle to crown. For those looking to run the lower offset crown with 29" wheels please reference our fit document to see if your headtube length is compatible. TSR Bleed Screws allow you to release excess pressures built up in the outer legs of your fork while riding keeping your fork smooth and supple all day long.Manufacturer's Part Numbers: 191-38304-A101 Black 27.5" 203mm 191-38304-A201 Black 29" 203mmBuy Manitou Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
Manitou Dorado Pro Suspension ForkThe legendary Dorado Pro is back and well-equipped to turn the suspension world upside down with many of Manitou's finest technologies. Developed specifically for the rigours of modern downhill riding, this model features high-quality 6000 series aluminium legs with a carbon outer and carbon upper tubes delivering a fantastic combination of stiffness, durability and low weight performance. Its updated stiffer chassis is also paired with a sealed version of the TPC+ damper and an improved Dorado Air Spring with IRT volume adjuster. These technologies combined into one ultimate platform provides more than enough tunability to satisfy any savvy suspension tuner while being so easy to adjust that every rider can dial in their fork with ease.Carbon Fibre and Inverted DesignAfter its debut 11 years ago, the Dorado Pro is once again dressed in carbon. In addition to looking amazing, the upper carbon tubes allow 238g in weight savings compared to alloy along with increased stiffness. Inverted forks provide an incredibly smooth and consistent feel due to the constant lubrication of the bushings and seals. Inverted forks also provide a major increase in fore-aft stiffness with much longer bushing overlap compared to traditional fork designs while maintaining torsional compliance which provides more control over rough trail sections.Dorado Air Spring and TSR Trail Side ReliefDorado Air spring systems contain a unique balancing valve that equalises the positive and negative air chambers during the air fill process. This gives the spring rate a consistent feel without any flat or dead spots in the stroke, along with giving riders of different weights the same initial stroke feel. TSR Bleed Buttons allow excess pressure built up in the outer legs of the fork to be equalised with a simple press of the button located on the top cap.TPC+ Twin-Piston Cartridge DamperTPC+ is a velocity and position-dependent damping circuit that maintains light damping through small bumps when the fork is high in the travel. As the fork compresses deeper in the travel the secondary TPC+ circuit engages and increases the damping force for added support and bottom-out prevention. Additionally, an independent Hydraulic Bottom-out circuit further increases the damping force in the final 30mm of travel to soften deep travel events and prevent hard bottom out.Features: Outer Leg Material: Carbon Leg Material: 6000 Series Aluminium Leg Diameter: 37mm Use: Downhill Axle: 110x20mm Boost Thru Axle Steerer Diameter: 1 1/8" Straight Spring: Dorado Air with Infinite Rate Tune (IRT) Compression Damping: Sealed Cartridge TPC+ with Hydraulic Bottom Out (HBO) Rebound Damping: Sealed Cartridge TPC Crown: Forged Travel: 203mm Adjustments: Air, IRT, Rebound, HS, and LS Compression Offset: 47mm Flat Crown (27.5"); 57mm Drop Crown (29") Ride Height: 582mm (27.5"); 602mm (29") Brake Post Mount: 203mm (223 Max) Max Tyre Size: 67mm Extras: Threaded TSR Buttons Options: Fender (sold separately) E-Bike Compatible: No Weight: 2970gTechnologies: Carbon Fibre Legs and the 37mm Chassis: Result in the stiffest and lightest Dorado to date. The carbon pro chassis is 27% stiffer than the previous 36mm version and 238g lighter than the new 37mm Expert version. Inverted Design: Provides an incredibly smooth and consistent feel due to constant lubrication of the bushings and seals. The inverted design also provides a major increase in fore-aft stiffness compared to traditional forks while maintaining torsional compliance which provides more control to the rider over rough terrain. Dorado Air Spring System: Contains a unique balancing valve that equalizes the positive and negative air chambers during the air fill process resulting in a consistent feel without any flat or dead spots. It also allows easy Travel Adjustability from 180 to 190 and 203mm without the need for any spare parts. IRT (Infinite Rate Tune): Allows for advanced spring tuning by independently adjusting air pressures in the beginning and end stroke. IRT technology creates a secondary positive air spring that affects only the middle to end stroke of the fork. This allows the main air spring to be set to lower pressures for improved small bump sensitivity while maintaining mid-stroke support and moderate to aggressive end-stroke ramp-up. Sealed TPC+: Is a velocity and position-dependent damping circuit that maintains light damping thru small bumps when the fork is high in its travel. As the fork compresses deeper in the travel the secondary TPC+ circuit engages and increased the damping force for added support and bottom-out prevention. Additionally, an independent Hydraulic Bottom-out circuit further increases the damping force in the final 30mm of travel to soften deep travel events and prevent hard bottom out. The new cartridge design with spring-backed IFP fully seals damper oil for the most consistent damping on long demanding DH runs. Spring-backed IFP has improved performance during extreme riding, unlike a bladder, an IFP pressurizes the oil at the initial stroke eliminating any cavitation for the most consistent damping. Fits Both 29" and 27.5" Wheels: Markings on the outer legs indicate the proper clamping point for ideal axle to crown measurements depending on wheel size. The fork legs can be used with both wheel sizes. Two Crown Options: Are available with this fork (select from the drop-down menu). The 47 offset is designed to work with 27.5" wheels and intended axle to crown. The 57 offset crown is designed for 29" wheels and axle to crown. For those looking to run the lower offset crown with 29" wheels please reference our fit document to see if your headtube length is compatible. TSR Bleed buttons: Allow you to release excess pressures built up in the outer legs of your fork with a simple tap of the button. This keeps your fork smooth and supple all day long.Manufacturer's Part Numbers: 191-37419-A101 Black 27.5" Short Offset 191-37419-A201 Black 29" Long OffsetBuy Manitou Components from Chain Reaction Cycles, the World's Largest Online Bike Store.