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 chromoly spindle for high stiffness and moderate weight
• Precision full-complement sealed cartridge bearings
• M15 crank bolts included
• Three bearings with two on drive side for extra life
• Defined Color: Black
• Bottom Bracket Shell I.D.: 1.37
• Spindle Length: 108
• Spindle Interface Type: ISIS
• Weight: 243
• BB Shell Width (mm): 68
• BB/Frame Interface: English