Tensioners, Keepers, & SS Kits

Brompton Chain Tensioner Assembly

Surly Tuggnut/Hurdy QR Adaptor Washer

Paul Chain Keeper Direct Mount Black

All-City Adjustment Springs & Bolts for Track Dropouts

Surly Singleator Pull-Up Spring

Surly Monkey Nuts v2.0

Surly Monkey Nuts v3, Dropout Spacers, Each

Surly Singleator Push-Down Spring

Surly Cross Check Frame Replacement Dropout Screws Pair

The Singleator mounts right up to your derailleur hanger and provides a simple, effective and adjustable means of tensioning the excess chain slack found in vertical dropout singlespeed drivetrains.

Hurdy Gurdy is a nifty device that keeps your rear wheel from slipping forward in the dropout under pedal load. It's designed for semi-horizontal front-loading dropouts.

Prevents your chain from fall down off the inner chainring.Adjustable clamp diameter for different seat tube sizes.

DMR STS Chain Tensioner, Stainless Steel, Silver

DMR 10mm Chain Tugs, Pair

Surly Single-Speed Kit, Spacers and Lockring

Want to build a single speed without having to buy a dedicated frame? Try the Melvin. The Melvin bolts to the frame where the rear derailleur would normally go and allows the use of a single speed rear wheel on bikes with vertical dropouts.