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Shimano's Dura-Ace Di2 takes shifting to the next level. The Rear Wiring Kit connects to both the left and right shifters and Junction Box A (which displays battery power and allows manual adjusting). It also includes a battery mount, cable covers to route and hide the cables and a wire plug/unplug tool. The External Kit is meant to be run on the outside of the frame.

Campagnolo's Record EPS V2 Interface Unit is like a translator, the vital piece of the electronic shifting puzzle. Mounted to the brake cable or the handlebar, it processes the data churned out by the EPS Power Unit (sold separately) and communicates it to you via an easy-to-read colored LED. Plus, it plays the critical role of converting every analog shift you send its way into a digital format so the system can work as a cohesive whole. There's also an easy-to-read LED battery gauge so you know when it's time to recharge the system. And don't mind the weather, as it's totally waterproof.

The Profile Design Flip/Ergo platform is designed to give riders the freedom to find an optimal low stack position with the ability to hold the bar tops when climbing. There are 80 distinct position options achievable just by moving the armrests. As a clip-on bar it is also possible to adjust the extension width, length, and tilt easily. - 50a extensions offer a 50deg ski bend shape with a 7.5mm (per side) lateral shift - Extensions 340mm long and can be cut to size to suit nearly every rider - Bracket: Flip - Clamp Diameter: 31.8mm (26.0 w/Shims) - Armrest: Ergo / 10mm Pads - Armrest Width: 112mm to 280mm in 18.5mm steps (with Extensions at 100mm) - Armrest Offset: -85mm to -17.5mm in 7.5mm steps - Armrest Stack: 40mm - Weight: 587g

Our new Sonic bracket has been designed as the successor to the J2, which has been a somewhat ignored part of our range. With this update, it brings our new generation fit range to a wider range of price points, replacing the J2 bracket. The Ergo armrest has been created to offer both a huge upgrade in fit range as well as increased rider comfort with a supportive curve to cup the arms. Performance - The Sonic/Ergo is designed to present minimal frontal area to create as little aerodynamic drag as possible. The main purpose of an aerobar is, of course, to get the rider into a fast position. Despite a fairly minimalist appearance, the Sonic/Ergo offers a comprehensive fit range for exactly this purpose. Fit Data - Armrest Offset: -70mm to -2.5mm in 7.5mm steps - Armrest Width: 124mm to 290mm in 18.5mm steps (With Extensions at 100mm) - Armrest Stack: 60mm (no riser kit) to 130mm in 5mm increments (With aftermarket Riser Kit) - The extension length and rotation can be easily adjusted using the top bolt. There are 100 distinct position options achievable just by moving the armrests. Combine that with the risers and this bar offers 1500 possible configurations. As a clip-on bar it is also possible to adjust the extension width and tilt easily. This is the most adjustable clip-on bar on the market (and in history). It is worth noting that our previous top-level clip-on aerobar, the J4/F35, offered 90 possible configurations. This highlights the significant step forward we’ve made with our new generation aerobars in allowing riders to precisely adjust their position. Origin - After we released the Supersonic (J5) as a premium bracket with market-leading fit options and versatility we wanted to bring the same kind of options to the rest of our range of brackets and thus aerobars. By simplifying the extension clamp and shifting the wing forward to the bar center line we were able to meet our targets. As a consequence of the simplification the Sonic is the lightest of our current brackets. - The Ergo armrest shares the flippable design of the rest of our new generation armrests. By swapping sides or rotating the armrests smaller increments of movement are achieved – making it simple to fine-tune a riders position or match the position from their previous aerobar or bike. Extensions - Extension Shape: A 50a extensions offer a 50° ski bend shape. The 50a offer a 7.5mm lateral shift per side. This allows the rider to get their hands narrower or wider without tilting the extensions so much that the shifters touch. - Bracket: Sonic - Clamp Diameter: 31.8mm (26.0 w/Shims) - Armrest: Ergo / 10mm Pads - Armrest Width: 124mm to 290mm in 18.5mm steps (with Extensions at 100mm) - Armrest Offset: -70mm to -2.5mm in 7.5mm steps - Armrest Stack: The minimum is 60mm and the bracket is compatible with our existing risers which add up to 130mm stack with (70mm of spacers added) - Weight: 559g

The Sonic/Ergo is designed to present minimal frontal area to create as little aerodynamic drag as possible. The main purpose of an aerobar is, of course, to get the rider into a fast position. Despite a fairly minimalist appearance, the Sonic/Ergo offers a comprehensive fit range for exactly this purpose. - Armrest Offset: -70mm to -2.5mm in 7.5mm steps - Armrest Width: 124mm to 290mm in 18.5mm steps (with Extensions at 100mm) - Armrest Stack: 60mm to 70mm in 5mm increments (with aftermarket Riser Kit) - Extension length and rotation can be easily adjusted using the top bolt - Weight: 545g

The Airstryke II takes the features of the ever popular Airstryke and adds an expanded fit range and more comfortable armrest. The flip up bracket and classic shape are retained. Performance The Airstryke II is intended to allow riders to add aerobars to their road or adventure bike without sacrificing the ability to hold the bars close to the stem. The comfortable grip angle and smoothly curved armrest offer a relaxed position for long days in the saddle. Fit Data - Armrest Offset: -85mm to 17.5mm in 7.5mm steps - Armrest Width: 131mm to 298mm in 18.5mm steps - Armrest Stack: 40mm Origin As one of the most popular model in the history of aerobars it seemed appropriate to update the much loved Airstryke with our new generation fit range and comfort focused armrest. We didn't want to change the elements that have made the bar so successful and the changes made just enhance the adjustability and comfort. - Bracket: L2 Flip-Up - Clamp Diameter: 31.8mm (26.0 w/Shims) - Armrest: Ergo Armrest - Armrest Stack: 40mm - Reach: -85mm to 17.5mm in 7.5mm steps - Extension Adjustment: 150mm (center of basebar - end) - Armrest Width: 155mm - 203mm - Weight: 592g

The Sonic/Ergo/45AR aerobar offers comprehensive yet simple adjustments, ideally suited to riders wishing to add aerobars to their road, gravel, or bikepacking bike. The Sonic/Ergo platform offers a large range of adjustments in every dimension, enabling riders to optimize the comfort of their positions. This bar can be used for draft-legal triathlon once shortened to meet the ITU Rules. - Clamp Diameter: 31.8mm (26.0 w/Shims) - Armrest: Ergo Ultra / 10mm Pads - Armrest Width: 124mm to 290mm in 18.5mm steps (with Extensions at 100mm) - Armrest Offset: -70mm to -17.5mm in 7.5mm steps - Armrest Stack: The minimum is 60mm and the bracket is compatible with our existing risers which add up to 130mm stack with (70mm of spacers added) - Extension Width: 100mm - Weight: 545g

Shimano Di2 External Battery Mount - All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions - Use Di2 system checker to update component firmware

Service your DT Swiss star ratchet hubs and wheels with DT Swiss Ratchet and Kits. - DT Swiss EXP 54 Tooth Upgrade Kit

Ratchet freehub bodies have a gloss finish and don't have a seal, as this is fixed on the hub shell. The Ratchet System was the first of this type for DT Swiss; used in the mid-range products like the 350 hubs. Includes end cap for 12 x 142 and 12 x 148mm hubs Fits Shimano 12-speed Micro Spline cassettes Crafted from lightweight aluminum Compatible with 12mm thru-axles

Genuine replacement parts Genuine Trek replacement part to protect your eBike battery. Keep the dirt out. - For use with removable integrated battery system - For use with 625Wh Bosch RIB batteries

Genuine replacement parts Genuine Trek replacement part to protect your eBike battery. Keep the dirt out. - For use with removable integrated battery system - For use with 625Wh Bosch RIB batteries

Profile Design's J4 Bracket Kit lets you fine-tune your aero position down to the millimeter. For lightness, strength and aerodynamics, the brackets are made of forged and CNC-machined 6061 aluminum and have Marine-quality 12.9-grade bolts that are corrosion-resistant and hidden. For easy and fast adjustability, by simply loosening the fixing bolt on each side you can slide your extensions in and out. Meanwhile, the brackets hold the armrests set back 20mm from the center of the base bar or you can reverse the armrests for a forward position. You can also stack aftermarket risers on the brackets to raise the armrests (armrests, risers and extensions sold separately).

Ergonomic Legacy II Aerobars feature extensions that provide a variety of hand positioning, and width and rotational armrests with a high stack to achieve a relaxed ride position. Ideal for riders that need extra positions for Centuries. - Injected Venturi Armrest and ZB Bracket - Forged 6061-T6 construction with armrest made of injected nylon and glass fiber - Fixed extension adjustment - Extension angle 44 degrees with 58mm rise - Fits both 26.0 and 31.8mm basebars, shims included

Desgined to increase the stiffness of the EPS front derailleur on frames with flexible braze-on mounts, especially frames with carbon fiber mounts. - Required for use on carbon frames with carbon front derailluer braze on mounts

Replacement handlebar display unit specifically for your Townie GO! 7D bike. Product details: - 22.2mm handlebar mount - Compatible with Townie GO! 7D only

This kit contains all the parts needed for scheduled maintenance and/or rebuild of B1 Stealth Reverb Seatposts. - Includes Blue 1-Piece U-Cup Seal Internal Floating Piston (IFP) - Rebuilds IFP, Poppet, Seal Head, Dust Seal, Piston, Brass Keys, and Bushing - Requires RockShox Specialty Tools to perform Service: Post Bleed Tool, Oil Height Tool, IFP Height Tool - B1 posts have a black return speed adjuster on the remote and "ROCKSHOX" laser-etched logos on stanchion by the saddle cradle

RockShox PopLoc Remote Upgrade Kits - Upgrade from crown adjust to remote adjust - Includes PopLoc remote lever and compression damper

RockShox Lever Assemblies

Wolf Tooth ReMote Light Action has a longer lever arm than the standard ReMote and is optimal for dropper posts with a harder pull or for riders that just prefer a really light actuation feel. It reduces the force to actuate a dropper by nearly a third of the standard ReMote. Based on rider feedback and tailored to work with some posts' stiffer internal springs, the ReMote Light Action is also the choice of those with thumb injuries or reduced hand strength. - Upfront cable fixing - Large diameter ball bearing - Cable-kind clamp - Low-profile, light action - Integrated cable adjust - Breakaway axle pivot - High-traction lever - Broad compatibility

RockShox's Maxle Lite is a lightweight aluminum through-axle system. It lets you remove and install your wheel as fast as with a standard quick-release while delivering the awesome stiffness with the improved strength and control of a through-axle. Plus, the lever can be closed in whatever position you like and no tools are required for installation and use!

BB30 service kit includes (2) Enduro 6806 ABEC-5 Angular Contact sealed bearings and 2 retaining clips. - Bearing Dimensions: OD: 42mm / ID: 30mm / Width: 7mm - Direct replacement bearing for OEM BB30 and BB30A systems

ReMote Dropper Lever - Lever pivots on a 21mm ball bearing for smooth operation - Cable Kind Clamp does not damage secured cables and features captive hardware. - Includes barrel adjuster for on the fly changes - Engineered break-away pivot that allows the lever to break away from the pivot in the event of a crash.

The tool-free Maxle Ultimate Front brings exceptional stiffness and durability to your ride in a high clamping force, easiest-to-use internal cam thru-axle system.

Campagnolo Cassette Lockrings

The tool-free Maxle Ultimate Rear brings exceptional stiffness and durability to your ride in a high clamping force, easiest-to-use internal cam thru axle system.

Zipp Speed Weaponry Cartridge Bearings

Wheels Manufacturing hangers are stiffer than almost any OEM hanger, which improves durability and shifting performance. - OEM hangers are only produced by a handful of manufacturers, mostly in Taiwan and China. As a result, you will see many bikes with exactly the same hanger. Bicycle manufacturers may make mid year changes. Please use the hanger photos to select the proper hanger for your application. - CNC machined 6061 aluminum - Black anodized finish - Made in the USA

Wheels Manufacturing hangers are stiffer than almost any OEM hanger, which improves durability and shifting performance. - OEM hangers are only produced by a handful of manufacturers, mostly in Taiwan and China. As a result, you will see many bikes with exactly the same hanger. Bicycle manufacturers may make mid year changes. Please use the hanger photos to select the proper hanger for your application. - CNC machined 6061 aluminum - Black anodized finish - Made in the USA

Service your DT Swiss star ratchet hubs and wheels with DT Swiss Ratchet and Kits. - DT Swiss Star Ratchet Kit - 18T

Get back on the road with a quality replacement hanger. - Attachment hardware is sold separately - For specific compatibility concerns, please contact our Customer Service team Specifications: - Size: Rear kit, 135mm Q/R - Mounting location: Rear kit - Attachment: 2-bolt

Chris King Headset Conversion Kits that allow conversion from one style to another in the same size. - Kit includes a stem cap, screw, star nut, scuff washer, and bearing cap, all the pieces you'll need to convert an existing threaded Chris King Sealed Bearing headset to a NoThreadSet - King offers 2 versions of this kit, our version does not include base plate

Genuine replacement parts When it's time to refresh your trusty bike, Trek Genuine Replacement Parts have you covered. Details: - Replacement cartridge units for Bontrager Line Dropper seat posts - Be sure to use the correct size cartridge for the respective amount of travel - Regular maintenance will help maintain performance and extend the lifespan

The Southpaw family of remote levers are designed for a secure feel without added complexity and weight, while incorporating ergonomics that compliment modern cockpits. - Ergonomically designed for 1x setups - Universal lever body - Integrated barrel adjuster - Stainless steel hardware - Understated graphics

Shimano's Dura-Ace Di2 Front Derailleur Braze-On Adapter is the correct mount for electronic Di2 derailleurs and their fast powerful servo motors.

Thin, durable clear chainstay protector with extra-strong adhesive. - Overall length - 10.375

Campagnolo Ultra Torque Cup and Bearing Kits. Includes 2 bearings and 2 seals. - Kit includes 2 bearings and 2 seals

Riser kits increase stack height to fit a wide range of riding styles for efficient positioning; compatible with ZBS Aerobars, T Plus Carbon Series Aerobars, T Plus Aluminum Series Aerobars, Supersonic Aerobars, Sonic Aerobars, and Subsonic Aerobars. - Multiple kits can be used to reach desired height up to 80mm rise - Raises armrest and extensions together to maintain a comfortable wrist position - Kit includes a pair of risers, bolts specific to riser size, and mounting hardware - Risers are compatible with J2, J3, and J4 Aerobar brackets - Clamp diameter: 31.8mm

RockShox Lever Assemblies

Bontrager's Speed Concept Seatpost Cap lets you get your position dialed for your next triathlon or time trial. Two different saddle offsets and widely a adjustable saddle angle means you'll find the perfect fit for your race against the clock.

Genuine replacement parts Keep your bike operating as it should. Get back on the road with a genuine replacement chainguard. - Color matched for direct compatibility - Full steel construction

Campagnolo Cassette Lockrings - Fits 2000 and newer Campagnolo wheels - Fits all Fulcrum wheels - Fits 1999 Record/Chorus hubs and all Campy hubs 2000-newer - 27.0mm thread OD - For use with Campagnolo cassettes with 12 to 16 tooth first position cogs - Lockring has a 38.5mm flange diameter

The Problem Solvers BB30/Press-Fit 30 Adapter Kit consists of DuPont Delrin (a tough, light type of plastic) pieces that allow you to use your external bottom bracket-style crankarms (24mm spindles, such as a Shimano Hollowtech II crank) with newer BB30 and Press-Fit 30 bottom brackets. Please contact us if you have any questions about compatibility.

The Ergo is the core of our new family of fit and comfort focused armrests. It offers a smoothly curved shape designed to comfortably cup the elbows while providing good support and control. The bolt pattern yields 48 possible configurations just by moving the armrest. The Ergo is compatible with all current aerobars and earlier models that used the F-19, F-22, F-35 or F-40 armrests. - Armrest Construction: Injected Nylon/Glass Fiber - Pad Construction: EVA foam with anti-bacterial/anti-microbial Lycra cover - Pad Model: 10mm - Color: Matte Black - Hardware: M6 x 10 FHB - Weight: 145g/pair

Genuine replacement parts The right parts for the right bike. Get back on the trail with a genuine replacement cover. - Original replacement top motor covers for 2018 Powerfly HT, FS, & LT - Color matched for direct compatibility, select neutral black covers available - Remove to access lower shock bolt on FS & LT models

BB30 service kit includes 2 Enduro 6806 ABEC-3 sealed bearings and 2 retaining clips. - Bearing Dimensions: OD: 42mm / ID: 30mm / Width: 7mm - Direct replacement bearing for OEM BB30 and BB30A systems - Enduro ABEC-3 bearings

Wheels Manufacturing hangers are stiffer than almost any OEM hanger, which improves durability and shifting performance. - OEM hangers are only produced by a handful of manufacturers, mostly in Taiwan and China. As a result, you will see many bikes with exactly the same hanger. Bicycle manufacturers may make mid year changes. Please use the hanger photos to select the proper hanger for your application. - These hangers DO NOT INCLUDE attachment hardware with the exception of QBP # FS1561 (DROPOUT 399) - CNC machined 6061 aluminum - Made in the USA

Wheels Manufacturing's SRAM compatible Universal Derailleur Hanger simplifies thousands of hanger designs into one universal standard. Machined completely out of aluminum, this new hanger is not only strong but designed to rotate backward and slip slightly in the case of an impact preventing chain jams and protecting the drive train. All Wheels Manufacturing replacement derailleur hangers are produced in our Colorado shop to exacting tolerances. - Compatible with bike frames designed to accept the SRAM UDH (Universal Derailleur Hanger) - Compatible with all MTB and eMTB drivetrains - Machined aluminum body anodized black - Thru-Axle thread pitch M12 x 1

Genuine replacement parts The chainguard you need. Get back on the road with a genuine replacement chainguard. - Original replacement chainguards for Electra Townie Go! bikes - Color matched for direct compatibility - Helps in the most crucial task of keeping pants so fresh and so clean

Wheels Manufacturing hangers are stiffer than almost any OEM hanger, which improves durability and shifting performance. - OEM hangers are only produced by a handful of manufacturers, mostly in Taiwan and China. As a result, you will see many bikes with exactly the same hanger. Bicycle manufacturers may make mid year changes. Please use the hanger photos to select the proper hanger for your application. - These hangers DO NOT INCLUDE attachment hardware with the exception of QBP # FS1561 (DROPOUT 399) - CNC machined 6061 aluminum - Made in the USA

- Clamps to a threadless steerer - Offers up to 4-1/2" stem height increase - Forged 6061-aluminum provides extra strength - Machined aluminum top cap is threaded, providing easy installation

Wheels Manufacturing hangers are stiffer than almost any OEM hanger, which improves durability and shifting performance. - OEM hangers are only produced by a handful of manufacturers, mostly in Taiwan and China. As a result, you will see many bikes with exactly the same hanger. Bicycle manufacturers may make mid year changes. Please use the hanger photos to select the proper hanger for your application. - These hangers DO NOT INCLUDE attachment hardware with the exception of QBP # FS1561 (DROPOUT 399) - CNC machined 6061 aluminum - Made in the USA

The Problem Solvers Head Tube Reducers resize your head tube to accommodate different size forks. These fine aluminum reducers are designed for traditional, external-cup headsets. Please contact us for any questions about compatibility with your bicycle.

SRAM PressFit 30/English Bottom Bracket Adaptor allows conventional threaded bottom brackets to be installed in a PF30 frame. - Not to be used with internal threaded bottom brackets; compatible with BBs that use two external cups

Original equipment hydraulic hoses for no-compromise brake performance. - Fits All B (2016+) Versions of Guide RSC RS R - Hose length: 2000mm

The Tanpan brings the range and security of Shimano mountain rear derailleurs to Shimano-equipped drop-bar bicycles. This means a greater gearing range for bigger adventures, better chain security for rough terrain, and lighter weight and reduced complexity for the daily commute. In order to deliver these benefits, the Tanpan amplifies road shifter cable pull to allow for seamless communication with mountain derailleurs. The result is ideal for riders looking to convert their road, gravel, cyclocross, or commuter bike to the simplicity and light weight of a single chainring. - Not Compatible with Tiagra 4700 - Compatible with most road, CX and gravel bikes - Designed to mount directly to adjuster-free cable stops on Shimano rear derailleurs - Certain chainring and cassette configurations benefit from a Goatlink - If the rear derailleur cable is routed internally through the chainstay and exits at the end of the chainstay above the axle or past the axle out the very end, you will need to utilize the inline ferrule

ABI Headset Bearing for new builds or replacements.

Arm Pad Set for Bontrager aero bars that offers support and comfort in the aero position. - inForm BioDynamic products optimize natural position for sustained performance - Ergonomic pad shape for ideal pressure distribution and support - Dual density pad provides a firm base with softer upper layer - Velvety soft cover and dual density padding provide secure and comfortable feel - Vacuum tooled design provides a consistent pad wrap and clean aero look - Cradle offers a stiff aero-proven design to support rider and cheat the wind - Compatible with any Speed Concept bar as well as all Bontrager clip-on aero bars - Includes pads, cradle, and mounting hardware

Wheels Manufacturing hangers are stiffer than almost any OEM hanger, which improves durability and shifting performance. - OEM hangers are only produced by a handful of manufacturers, mostly in Taiwan and China. As a result, you will see many bikes with exactly the same hanger. Bicycle manufacturers may make mid year changes. Please use the hanger photos to select the proper hanger for your application. - These hangers DO NOT INCLUDE attachment hardware with the exception of QBP # FS1561 (DROPOUT 399) - CNC machined 6061 aluminum - Made in the USA

Wheels Manufacturing hangers are stiffer than almost any OEM hanger, which improves durability and shifting performance. - OEM hangers are only produced by a handful of manufacturers, mostly in Taiwan and China. As a result, you will see many bikes with exactly the same hanger. Bicycle manufacturers may make mid year changes. Please use the hanger photos to select the proper hanger for your application - These hangers do not come with mounting hardware - CNC machined 6061 aluminum - Black anodized finish - Made in the USA