Going to a 1×10 setup? Get your gearing right with the Wolf Tooth Components 16T replacement cog. The Wolf Tooth Components Single Speed cog is one of the best, most durable cogs out there. If you’re upgrading your bike to a 1x and using a 10-speed 11-42T cassette, this cog replaces either the 15T or 17T to give you a gearing range that effectively mimics what you would find with a 1×11 setup by reducing the gap in the middle of the cassette. Stainless steel for excellent durability and corrosion resistance Fits Shimano/SRAM freehub pattern Compatible with Shimano 11-42T 10-speed cassettes Made in the USA