If you order a SRAM Transmission from us we will include the insert set for free! Note the silver inserts are samples, the final is instock this week and will ship as black.

Use this hanger kit to make your new or existing Boost Chumba Frame compatible with the new SRAM Transmission Drivetrain (T-Type for short). These should be paired to a 55mm chainline crankset. Note, the math works out that they should also work on a 142x12 frame with a 52mm or Boost chainline. We’ve tested and confirmed the Boost fitment. The Standard 142x12 chainline is currently un-tested, but in theory should work fine.

PS don’t forget to order the corresponding axle available here: https://chumbausa.com/components/wolf-tooth-rear-thru-axle