ISIS AC Sport Bottom Bracket, Overdrive w/Bolts

Description

The ISIS AC Sport Bottom Bracket, Overdrive w/Bolts is a direct replacement schwinn ac parts component designed to restore smooth, reliable crank rotation on select Schwinn indoor cycles. Built for the Schwinn AC Sport, this bottom bracket assembly replaces worn or noisy drivetrain bearings and includes mounting bolts for a complete service repair.

• Compatible with select Schwinn AC Sport indoor cycling bikes using OEM part number 003-1508.
• Also cross-referenced to replacement number 84990 for certain Schwinn AC and IC series bikes.
• Features an ISIS round splined shaft design and fits frames with an approximate 1 7/8 inch mounting hole.
• Commonly listed as a 68 x 113 mm ISIS bottom bracket for AC platform indoor cycles; verify your original part number before ordering.

This ac sport isis ac sport bottom bracket overdrive assembly is made to deliver stable crank support and consistent pedaling feel under heavy studio or home use. It is an OEM-style replacement for the original Schwinn unit, with the spindle, bearing assembly, and bolts configured for straightforward fitment on compatible bikes. Installation is generally considered a moderate repair for owners or technicians familiar with crank removal and bottom bracket tools. If your bike has clicking, side-to-side crank play, rough rotation, or bearing drag, replacing the schwinn isis ac sport bottom bracket overdrive can help return your cycle to smooth operation.

OEM-quality replacement with easy DIY installation potential, and it ships same day from our warehouse.