Yew! Bolt-on Bell 47 and 12-speed chains (including SRAM

and 12-speed chains (including SRAM Flattop 12-speed chains)

4mm Allen wrench to adjust vertical

They are for use with all pre-2014 Shimano 5-bolt cranks

with their 3 pack lock set

Yew! Bolt-on Bell 47 and 12-speed chains (including SRAMIf you ride hard and often, the all new Timber Model Yew! is just what youve been asking for. It has the same sweet sound and performance of our existing bells, plus a handful of nifty improvements. Its built stronger, and all parts are now completely modular, including the cable and clapper ringer system. If anything wears out or breaks, you can replace it quickly and easily. FEATURES: A spring loaded piston to the on off lever for smoother shifting