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Turn your geared bike into a singlespeed machine with Surly's Singleator. The Singleator mounts to your derailleur hanger and provides a smooth, quiet and adjustable means of tensioning the excess chain slack on any bike. It's made from strong forged steel and features a triple-sealed spring, large-cog capacity, chain guides, fully-adjustable chain line, floating pulley, and a stainless-steel pivot bushing. And, it works with both BMX and standard chains.

Hurdy Gurdy is another nifty device that keeps a rear wheel from slipping forward in the dropout under pedal load. It's designed for the Cross-Check's semi-horizontal front-loading dropouts, and will also work on many other similar dropouts. Hurdy Gurdy is investment cast of stainless steel for durability and good looks, and shares many of Tuggnut's design features. Its two axle holes allow for a wide variety of fore/aft wheel positions, it will work with standard QRs, bolted axles, and nutted axles up to 10mm.

- Clamps to a threadless steerer, offers up to 3-1/4" stem height increase - Forged 6061 aluminum - Threaded alloy top cap

Shimano's In-Line Brake Cable Adjuster with quick release allows you to make changes to your road caliper brake's cable tension or open a brake caliper's arms to remove a wheel.

One of the coolest things about Surly is if they can't find an existing part that fits their standards, they just make one themselves. This cable hanger is made to fit around the oversize bolt on their Constrictor seatpost clamp so you can be sure it will fit around almost any other seatpost clamp bolt too. It comes complete with an adjusting barrel.

Whether for derailleur clamp clearance, tire clearance, or personal preference, sometimes it can be advantageous to run the wheel further back in the dropouts. Monkey Nuts install into Surly horizontal dropouts to make spacing the wheel back easy. There are 3 different sets depending on the type of dropout and axle configuration the dropout is intended for. Simply select the correct version of Monkey Nut, install it into the frame, and slam the wheel all the way forward. Bang, done.

The SRL lever gives riders with 1x drivetrains the option to control their Command Post with lever option that mounts beneath the bar in place of a front shifter. - Command Post lever for the modern 1x drivetrain systems. - Adjustable lever position allows for the perfect set up. - Sealed cartridge bearing pivot for smooth action. - Ideal pull ratio for easy lever activation. - Requires additional mounting hardware (SRAM MatchMaker or equivalent is recommended).

The Problem Solvers Cable Doublers are made of light, durable machined and anodized aluminum and they are Teflon coated for a super-smooth cable pull every time. They come in two models. The first allows you to control two brakes with one lever. The second allows you to control one brake with two levers. Why? Well, there are myriad applications: tandems, cyclocross bikes, fixies, tricycles, recumbents, cycles for those with special needs, bike polo bicycles, those 4-person bikes you see on beach boulevards, and so on. You could even link both models of Cable Doublers together for the ultimate in redundancy!

If you're suffering from a slipping seatpost, Surly has the remedy. The Constrictor Seatpost Clamp grabs your post tight and hangs on for dear life. It's machined from anodized aluminum billet, uses an 8mm bolt for ultimate strength, and can accommodate a rear cantilever brake hanger.

Power links provide tool free chain assembly. - Chain Compatibility: SRAM - Reusable: No

Giant's Connect SL S-Bend Carbon Aerobar Extensions are for use with Giant's Clip-On Aerobar Clamps (sold separately). This model features the S-Bend. Thanks to carbon construction, these are featherweight and super-stiff extension bars. Plus, they have 70mm of fore/aft adjustment to dial in your ideal aero position.

This is the correct plug-and-play wire for Shimano's E-Tube Di2 electric-shifting systems. It comes in sixteen different lengths, so choose the one(s) that's right for your Di2 E-Tube wiring configuration.

Profile Design's F-19 Replacement Pads are the correct ones for their F-19 armrests. These pads feature Lycra-covered medium-durometer foam and are held on with Velcro straps for easy installation.

The Problem Solvers GXP Spindle Adapter Kit lets you adapt a GXP crankset to a BB30 or Press-Fit 30 bottom bracket. It's used with the Problem Solvers BB30/Press-Fit 30 Adapter Kit, which is sold separately.

Precision CNC machined of light and durable 7000-series aluminum with a fine anodized finish, and 100% made in the USA, Thomson's Seatpost Collar is a beautiful upgrade for your bicycle. It features their bolt, washer and barrel nut combination that allows float on both sides of the collar slot for consistent clamping force. Plus the bolt-hole angle, the collar's 12.7mm inside height and the offset slot, ensure optimum seatpost clamping force at only 25 inch pounds of torque to protect your precious frame and seatpost.

• Quick-release seatpost clamp • Aluminum lever and cap with a 6mm chromoly bolt

This is a MegaExo Left Crank Bolt for 19mm MegaExo Cranks. - M12 bolt

Hose fittings fit many of SRAM's newest hydraulic brake models. - Fittings are backwards compatible with older SRAM and Avid hydraulic brakes

The Top Cap Assembly on your Reverb contains a dust wiper and bushing. These parts need to be in good shape for the continued smooth operation of your Reverb. This top cap includes the cap, dust wiper, and bushing. - Fits A1 and A2 generation seatposts - For "A1" designated posts, 2010-2012 - A1 posts have a silver return speed adjuster on the remote and no laser-etched logos on stanchion by the saddle cradle - For "A2" designated posts, 2013-2016 - A2 posts have a black return speed adjuster on the remote and no laser-etched logos on stanchion by the saddle cradle

• With bolt & nut • 1 1/8-inch = 28.6mm • 1-inch = 25.4mm

Shimano Di2 External Battery Mounts - 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

• Quick-release seatpost clamp • Full stainless-steel construction • Rubber-covered handle for a great grip

Replacement pulley set with ceramic bearings. Compatible with 7,8,9, and 10-speed Campagnolo, Shimano, and SRAM drivetrains.

Dimension Seatpost Binder Bolts - 16g

Electra's Townie Quick-Release Seatpost Collar offers a little extra bling and convenience to your Townie bike because it allows no-tools seat-height adjustment. This quality metal clamp is easy to install and use and it securely fastens your seatpost in place.

Dimension Stem Column Adaptors - Total quill length 180mm - Measurement from minimum insertion to top of steerer adaptor is 118mm - Alloy - Quill insertion diameter: 1-inch

- Fits Shimano and ISIS BBs - 16mm ID x 20mm OD x 1.5mm Thick - Bag of 10

Weight-savings is no excuse to have an ill-fitting cockpit. Shave every possible gram with these Carbon Headset Spacers from FSA, and ensure your bike fit is right on the money.

- Prevents chain derailment when shifting to inner ring - Adjustable hose-type clamp fits 1-1/8" to 1-3/8" seat tubes

Your frame is BB30 or PF30. Your crank is 386EVO. No sweat. This adapter from FSA makes it happen. - For road use - Weight: 50g