and 20mm and all options work with 6-bolt brake rotors

and a drastically shortened normal head on the other

you can easily install and remove when needed using the quick release

they are made for all-day shredding

The Park SR-2

Burgtec Thick-Thin Direct Mount Chain Ring - SRAM Direct Mount - 3mm Boost - Round - Rhodium Silver - 9-12 Speed - 30T Back in Stock and 20mm and all optionsKeep that chain in place where it should be with a Burgtec Thick Thin Chain Ring. Designed with a proven thick thin tooth profile for improved chain retention. Who's this item for: Riders who use 1x drivetrains and are looking for superior chain retention as well as durability. Weight: 0. 08g Pros: Wide range of tooth options. Works for 9, 10, 11, and 12 speed setups. Great build quality. Cons: Oval options not available in all mounting types.