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IMAGES & OEM No's for Reference Only
- Schwinn Bottom Bracket OEM Ref 84990 and 003-1508 for indication only.
- Bottom Bracket 1 7/8", Isis.
- This bottom bracket is an ISIS (International Splined Interface System) drive style with the round splined shaft. This bottom bracket is for use with crank arms that have the round splined hole.
- There are different size ISIS bottom bracket replacements. This bottom bracket has a diameter of 1 7/8" for the mounting hole in the frame. This diameter must be the same as the bottom bracket being replaced.
- Used on
- AC Classic
- AC Performance
- AC Sport
- IC Elite
- IC Evolution
- IC Evolution SR
- IC Pro
- Pro
- SE/Elite
- •Used on "Evolution/Evolution SR" units made from 2005 or newer.
- •The fist four number on the serial number will tell you what month & year the unit was manufactured.
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