TruVativ PowerSpline Bottom Bracket - English (BSA), 73 x 118mm 29" Active ventilation: Allows you to

Active ventilation: Allows you to open or close ventilation to modify the airflow and heat exhaust

Building on Hope’s 30+ years of manufacturing hubs

with a noticeably lighter swing weight

Put it on and forget about it

Cushier foams and outside placement of the Talyn® ease adaptation

TruVativ PowerSpline Bottom Bracket - English (BSA), 73 x 118mm 29" Active ventilation: Allows you toThe SRAM PowerSpline bottom bracket features a proprietary spline design used with many OE spec moderately priced TruVativ cranks. Crank bolts are included Heat treated chromoly 12 spline spindle to make sure it can go the distance with even the most demanding riders