Topeak External Bottom Bracket Tool Tables TwinTurbo technology utilizes the pull

TwinTurbo technology utilizes the pull and push of every stroke by transferring air between its two barrels

Pushing the handle down compresses the air in the smaller barrel into high pressure output that fills road tires with high pressure

and an R4 carbon-injected nylon outsole

Main divided / padded

WhiteLite® Aero USB 1W Light up your ride like a thunder bolt

Topeak External Bottom Bracket Tool Tables TwinTurbo technology utilizes the pullEngages the 16 notches of the external bearing cups. Small plastic tool engages the 8 internal splines of the crank arm adjustment cap and engages 16 notches of the external bearing cups for Shimano BB 9000 for easy removal or installation. * Shimano is a registerted trademark of Shimano Inc. TOOL MATERIAL CrMo steel Engineering grade polymer SIZE 5. 2 x 4 cm 2 x 1. 6 (2 pcs) WEIGHT 137 g 4. 82 oz (2 pcs)