1 7/8" ISIS Bottom Bracket for Schwinn IC and AC Indoor Cycling Bikes

• This bottom bracket has a diameter of 1 7/8" for the mounting hole in the frame of certain Schwinn AC and IC bikes.
  • Due to different size ISIS parts, this diameter must be the same as the original bottom bracket.
• Bottom bracket is an ISIS (International Splined Interface System) drive style with the round splined shaft.
  • Mates to the round splined hole of the crank arm.

Damage to the parts or equipment can result from improper torque

Not compatible with Schwinn bikes manufactured 2003 and earlier which have bottom brackets with square tapered shafts.