E-mountain bike riders on a Bosch Gen 4 motor who want to change gearing or upgrade to a lighter ring with strong chain retention.
The Wolf Tooth Bosch Gen 4 Direct Mount Chainring bolts straight to the Bosch Gen 4 motor spider and brings Wolf Tooth's Drop-Stop chain retention to your e-bike. It suits most Boost and Super Boost bikes using that motor.
This is the 34T size with the Drop-Stop B profile, which works with almost all 9, 10, 11 and 12-speed chains, including SRAM Transmission T-Type. It is designed for a 55 mm chainline and weighs 95 g.
Each ring is machined from 7075-T6 aluminium at Wolf Tooth in Minnesota, USA.
Bosch Gen 4 direct mount
Fits most bikes with the Bosch Gen 4 motor.
Drop-Stop B
Works with almost all 9 to 12-speed chains, including SRAM T-Type.
Light and strong
7075-T6 aluminium, 95 g in 34T.
Made in the USA
Machined by Wolf Tooth in Minnesota.
Chainring
Compatibility
Drop-Stop B
Wolf Tooth's narrow-wide style tooth profile for chain retention, compatible with almost all 9 to 12-speed chains including SRAM T-Type.
Great for
Maybe not for
Direct mount for Bosch Gen 4 motors, 55 mm chainline. Check your motor generation before ordering.
Check the motor generation
Bosch has used a few different spider interfaces over the years, and this ring is for the Gen 4 motor only. If you are unsure which motor you have, bring the bike in or send us a photo and we will confirm fit.
Components machined in Minnesota.
Wolf Tooth Components designs and machines bike parts in Minnesota, USA, and is well known for its Drop-Stop chainrings.
