Burgtec Thick-Thin Direct Mount Chain Ring - Shimano Direct Mount - 3mm Boost - Round - Purple Rain - 12 Speed Shimano - 30T netsuite-webdata-created It's the tread pattern that

It's the tread pattern that differs between them

003 Barcode: 710845816963

Does it fold up for storage: It is able to be folded down when not in use

The Performance Glove is constructed from Spandex

Bearing style/amount: Oversized 6902 bearings for better durability

Burgtec Thick-Thin Direct Mount Chain Ring - Shimano Direct Mount - 3mm Boost - Round - Purple Rain - 12 Speed Shimano - 30T netsuite-webdata-created It's the tread pattern thatKeep 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.