These are the lightest weight and best looking stainless steel single speed cogs available. They feature extra tall teeth for reliable chain retention when using chain tensioners and are machined from 416 stainless steel billet with heat treating and electropolishing post processing for durability and corrosion resistance. They are reversible and feature a 4.5 mm width at the base that won't dig into your freehub body.

Specifications
Material: hardened and electropolished 416 stainless steel
Made in the USA

Compatibility
Compatibility: Fits Shimano Hyperglide-style freehub spline (geared or singlespeed)
Not Compatible: Shimano Microspline or SRAM XD freehubs
Chain Compatibility: Works with any 9-, 10-, and 11-speed chain and SRAM Eagle, Shimano HG+, KMC, Wipperman, Connex 12-speed chains
Not Compatible with Chains: Single-speed specific chains, 12-speed SRAM Transmission (T-Type), Road Flattop chains, or Campagnolo Ekar 13-speed chain

Mfr Claimed Weight
16T • 30g | 17T • 32g | 18T • 35g | 19T • 38g | 20T • 40g