ISIS is a splined interface bottom bracket/crank design used by Truvativ FSA Raceface and other brands.Aluminum cups require TruVativ or compatible installation tool Heat-treated thick-wall chromoly spindle handles the abuse of downhill riding Precision full-complement sealed cartridge bearings M12 crank bolts included (unless noted)
| Bottom Bracket Shell I.D. | 1.37 |
| BB/Frame Interface | English |
| BB Shell Width (mm) | 73 |
| Weight | 344, 406 |
| Spindle Interface Type | ISIS |
| Spindle Length | 113, 128 |
| Defined Color | Black |
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