Sram: FOR TREK FRAME WITH BB90 and FRAMES WITH ITALIAN THREAD – GXP INTERFACE (NOT DUB COMPATIBLE) Riders want more range and closer steps between gears—and that’s the driving design principle of the SRAM Force® crankset. It offers smaller chainrings with a consistent 13-tooth gap between size variants, delivering smooth, accurate and dependable shifting for the modern rider. Always find the sweet spot.THINGS TO REMEMBERX-Range™ gearing technology gives you more range and a smoother gear progression, so you’re always in the right gearCrisp and accurate front shiftsDUB™ bottom bracket adds durability and simplicityCan be upgraded to a power meter SPECIFICATIONSPTA_Speeds: 12PTA_BB Compatibility: GXP/PF GXP 68mmPTA_Chainring Size: 46/33, 48/35PTA_Crank arm length: 170mm, 172.5mm, 175mmPTA_Chainline: 45.0mmPTA_BB Spindle Interface: 24mmPTA_Chainring material: AluminumPTA_Guard: No GuardPTA_Bolt Circle Diameter (BCD): Direct Mount (DM)PTA_Crank arm material: CarbonPTA_Color (Crank arm): Natural carbon