Rotor UBB4630 PF30 ABEC3 for 30mm Variant:Rotor Bottom Bracket UBB 4630 PF30 for 30mm Cranks Steel black S68808 SP 1-1/2" 440C stainless

S68808 SP 1-1/2" 440C stainless steel Angular Contact Headset bearing (40mm x 53mm x 7mm: 45 x 45deg)

while reducing fatigue and strain

Adjustment on the go

This is a core piece of your cycling wardrobe

Wheel play can be adjusted out of the hub providing a more stable wheel

Rotor UBB4630 PF30 ABEC3 for 30mm Variant:Rotor Bottom Bracket UBB 4630 PF30 for 30mm Cranks Steel black S68808 SP 1-1/2" 440C stainlessYou, or more specifically, your choice of frame, motivated us to address challenges related to bottom bracket installation and durability thank you. We embraced the task to improve upon so called bottom bracket standards to give you the UBB4630. Crafted from 7000 series aluminum alloy, the UBB4630 uses a threaded sleeve to lock both cups in place without having all the locking effort rely on the press fit shell, thus providing a uniform spin and