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The Promax EX-2 English bottom bracket features forged and CNC machined aluminum cups dual-lip labyrinth low-friction seals and custom sealed bearings
Works on 5-speed to 12-speed mountain and road bike cassettes and freewheel
Compatible Wheel Size 12 to 20 Primary Color Silver Material Steel/Plastic
Low-drag labyrinth seals
Drop Bend Style Compact Defined Color Black Width Measurement Center Weight 440 Accessory Mount Diameter 31
Park Tool PRS-30 Mechanical Lift Repair Stand MFPN=0275.009.018 The Promax EX-2 English bottomWith a footprint no larger than a traditional bicycle repair stand the PRS 30 easily lifts and lowers bikes up to 120 lbs. The professional grade clamp lowers to a height of 29` allowing you to clamp onto the seatpost or seat tube of most bicycles without needing to lift them into the stand. Height adjustment is accomplished using an internally geared mechanism driven by a simple hand crank. Height can also be adjusted using a common battery operated
