Promax EX-1 Alloy external Sealed Bottom Bracket 68/73mm Black FASTR-X reaches the rarefied balance

FASTR-X reaches the rarefied balance of speed and control like never before

Small Large Saddle Material Co-molded Nylon Shell Co-molded Nylon Shell Saddle Dimensions 165mm x 108mm 216mm x 114mm Seatpost Material Carbon Fiber Carbon Fiber Seatpost Diameter (Ø) 22

The R4 uses EVS’s elastic Cross Strap system to secure the collar firmly in place

2-finger pull - Right side

Promax EX-1 Alloy external Sealed Bottom Bracket 68/73mm Black FASTR-X reaches the rarefied balanceEX 1 External bottom brackets feature cold forged and CNC machined alloy cups, dual labyrinth bearing covers and precision sealed bearings. They are the perfect match to Promax CF 2 and HF 2 cranks and ultimate upgrade to the budget BBs sold with most crank sets. Fits all 24 millimeter bottom bracket spindles and frames with 68 or 73 x BC1. 37 bottom bracket shells