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$249.99
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.

$214.99
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.

$174.99
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

$169.99
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

$132.99
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

$129.99
Service your DT Swiss star ratchet hubs and wheels with DT Swiss Ratchet and Kits.
- DT Swiss EXP 54 Tooth Upgrade Kit

$119.99
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

$119.99
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

$116.99
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).

$104.99
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

$99.99
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

$89.99
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

$71.00 - $84.99
RockShox PopLoc Remote Upgrade Kits
- Upgrade from crown adjust to remote adjust
- Includes PopLoc remote lever and compression damper

$79.99
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

$51.99 - $74.99
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!

$74.99
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.

$69.99 - $70.00
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.

$69.99
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.

$65.00
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

$65.00
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

$64.99
Service your DT Swiss star ratchet hubs and wheels with DT Swiss Ratchet and Kits.
- DT Swiss Star Ratchet Kit - 18T

$49.99 - $63.00
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

$59.99
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

$59.99
Shimano's Dura-Ace Di2 Front Derailleur Braze-On Adapter is the correct mount for electronic Di2 derailleurs and their fast powerful servo motors.

$57.75
Thin, durable clear chainstay protector with extra-strong adhesive.
- Overall length - 10.375

$54.99
Campagnolo Ultra Torque Cup and Bearing Kits. Includes 2 bearings and 2 seals.
- Kit includes 2 bearings and 2 seals

$25.99 - $54.99
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
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