The 12mm slotted MDS dropout is the newest chip for Surly's MDS equipped trail frames. You like chips, don't you? The 12mm slotted dropout chip uses a standard derailleur mount for maximum compatibility and is made of cast and machined 6061-T6 aluminum, with a fender eyelet. What's the coolest part about the 12mm slotted MDS chip, you ask? The fact that it also has the capability to run a 12 x 142mm thru-axle in a single speed configuration. This is good news because single speeds are good news. When you get an MDS equipped frame you're getting the option to set it up however you want. You can run a 142 x 12mm thru-axle rear end with a direct mount Shimano hanger, standard 135mm QR or The Mighty Singlespeed. The way this will work is that Surly complete bikes that feature the MDS will ship with whatever chip is compatible with derailleur spec. For instance, the complete Instigator 2.0 ships with the 142 x 12mm thru-axle Shimano chip. If you want to change it to a singlespeed later (and why wouldn't you?), all you have to do is get the SS chip. Frames will ship with all three MDS chips so pick your poison. The 142 x 12mm and 135mm QR chips are made of cast and machined 6061-T6 aluminum and The Mighty Singlespeed chip is 304 stainless steel, because the two words 'aluminum' and 'singlespeed' should never be too close to each other. Bad things can happen…. As you can see, the MDS gives you not just different build options, it lets you use a more varied selection of parts for your frame up builds. The MDS is featured on most of our trail bikes. That's right: Krampus Ops, Karate Monkey Ops, Instigator 2.0 and Ice Cream Truck frames all sport these puppies.

- Surly Chain Tensioner part

Replacement dropout screws for the Surly Cross Check. - Bolt length: 40mm

Carbon fiber headset stack spacers, precision cut to ensure proper headset function. - Compatible with all threadless and threaded headsets

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.

Jagwire's Brake or Shift Cable Tips are made of lightweight, corrosion-resistant and durable aluminum and are the right size to nicely fit over the ends of up to 1.8mm-diameter cables. These caps are crimped in place on the cables to prevent fraying and ensure your cables last a long time. The tips come in colors to add a little style to your bike.

Loose ball bearings in bags or bottles. - Replacement loose ball bearings

KMC Missing Link connectors are for use on new chains or to keep in your seat bag for an emergency repairs. - Compatible with Shimano, SRAM, and KMC 11-speed chains

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 Sheldon Fender Nuts are an awesome way to avoid the brake-centering problems caused by mounting fenders directly to your brakes. They're named after the inventor and bike guru, Sheldon Brown. These special Sheldon nuts take the place of your existing brake nuts. They have threaded extensions for standard 6mm bolts (sold separately) providing a secure mounting place for your fenders that won't mess with your brake adjustment. They make it easier/faster to install and remove fenders, too, so they're great for commuting bicycles.

Replacement derailleur hanger screws for Syntace X-12 system.

A five-piece IGUS bushing spacer kit for mounting rear shocks. - Compatible with x eyelet shocks using IGUS bushings mounted in the shock eyelet - Select the correct hardware kit for your mounting bolt diameter (e.g. 6mm, 8mm) and frame mount width (e.g. 22mm, 24mm)

Replacement small parts for Hope disc brake Hope disc brake calipers.

Hope Tech 4 master cylinder reservoir lids are a perfect fit as a replacement or for those looking for a customized look. - Made from high quality precision CNC machined aluminum - Durable anodized finish - Includes (2) torx cap screws - Only compatible with Hope Tech 4 brake levers

Replacement lower hardware for Rockshox forks.

RockShox Seal Head Assemblies

Replacement lower hardware for Rockshox forks.

RockShox 32mm Seal Kit

Bottom bracket cup and spindle spacers for adjusting chainline or bearing play.

Bottom bracket cup and spindle spacers for adjusting chainline or bearing play.

Wolf Tooth CenterLock Rotor Lockrings for securing centerlock rotors to centerlock hubs. Machined from 7075-T6 aluminum at Wolf Tooth in Minnesota, USA. - Compatible with 12mm, 15mm and 20mm thru axles and QR - Machined 7075-T6 aluminum - Durable anodized finish - Torque to 40Nm - Not compatible with 6-bolt rotors and hubs - Washer included

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. - These hangers DO NOT INCLUDE attachment hardware with the exception of QBP # FS1561 (DROPOUT 399) - CNC machined 6061 aluminum - Made in the USA

Hope Brake Lever Parts

Actuators are at the bottom of the post and convert the cable pull to open the piston, allowing the dropper to move.

KS Dropper Post Service Parts

Saddle clamp heads and lowers for KS Dropper posts.

Saddle clamp heads and lowers for KS Dropper posts.

Parts for the service of the seal and restore the smooth cycling of KS dropper posts.

RockShox XLoc Parts