If you have a Shimano crankset with their new direct mount chainring attachment system you'll need a tool to remove and install the chainrings

Palm Style: Single-layer polyurethane palm for weather protection

Reduced pad life

Pros: Wearable as a duffle or rucksack with adjustable and removable shoulder straps

Burgtec Thick-Thin Direct Mount Chain Ring - SRAM Direct Mount - 3mm Boost - Round - Toxic Barbie Pink - 9-12 Speed - 30T Dangerous Goods If you have a ShimanoKeep 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.