Sram/Truvativ GXP BB86 Bottom Bracket The Sram/Truvativ GXP BB86 bottom bracket features light weight plastic cups and gutter seal technology to keep muck at bay and to prolong life. Sram/Truvativ GXP BB86 Bottom Bracket Features BB Shell Width (mm): 86 mm BB/Frame Interface: BB86 / PF86 Bottom Bracket Shell I. D. : 41 Defined Color: Black Spindle Interface Type: Tru Vativ GXP Weight: 95 g | Sram |Truvativ Gxp Bb86 Bottom Bracket Gxp Bb86 Road, 00. 6415. 033. 000