Pedro's BB Socket Holder II Wheel Brand_Fulcrum but has a combination of

but has a combination of smooth and rough texture to trick the air into flowing around the lower leg more efficiently

extends to the neck

Evolyte® carbon fiber stabilizer base

CRANKSET -  Shimano FC-RX600

Kinney sports a robust Shimano Tourney 500 derailleur and RevoShift grip shifters

Pedro's BB Socket Holder II Wheel Brand_Fulcrum but has a combination ofHolds socket tool to BB axle to eliminate slippage during removal and installation. New spring preload allows increased flexibility and rotation during use New design works with square taper and splined axles with M8, M12, or M15 internal spindle thread Made from heat treated tool steel for the ultimate in strength and lasting performance Use with Pedro`s Splined Bottom Bracket Socket. Compatible with Pedro`s Pro Socket Handle