oval chainrings, keeping the chain secure at every single crank position

TRS guides only. Includes two mounting bolts.

for bikes compatible with ISCG mounts. The adjustable polycarbonate compact upper slider opens without tools for easy access to the chain. The solvent-resistant upper slider has co-molded rubber to keep things quiet. ...

chainring guide designed to keep your 2X system silently secure even on the most demanding rides. This is perfect for the rider that wants the lightest dual chainring guide possible.

to aid 1x systems by reducing chain-dropping without adding a lot of excess weight.