Rotor UBB4630 BBRight Bottom Bracket

End bottom bracket creaks for good. The Rotor UBB4630 BBRight is a precision-engineered press-fit bottom bracket that solves the most common problems associated with PF30, BBRight, and 386 EVO frame standards — noise, bearing wear, and installation inconsistency — through a fundamentally smarter design.

Rather than relying entirely on the press-fit shell to hold both cups in alignment, the UBB4630 uses a threaded sleeve to lock both cups in place  — ensuring perfect bearing parallelism regardless of minor variations in frame shell tolerances. This means smoother crankset rotation, a quieter drivetrain, and significantly extended bearing life compared to traditional press-fit bottom brackets. The flush fitting in the press-fit region prevents bearing overload and improves bearing alignment , while the external bearing location increases BB shell stiffness for a stiffer, more efficient pedalling platform. The internal sleeve also prevents cable guides from rubbing against rotating parts  — a thoughtful detail that protects both your cables and your investment.

Constructed from CNC-machined 7075 aluminium alloy, the UBB4630 is light, durable, and built to Rotor's exacting standards. Compatible with 30mm spindle cranksets from Rotor, SRAM, and other manufacturers using the 30mm standard.

Key Features:
- Threaded sleeve design — locks both cups for perfect bearing alignment
- Eliminates creaking and noise associated with traditional press-fit BBs
- External bearing location — increased BB shell stiffness and smoother spin
- Flush fit prevents bearing overload and improves bearing longevity
- Internal sleeve protects cables and electronics from rotating parts
- CNC-machined 7075 aluminium alloy construction
- Steel cartridge bearings
- 30mm spindle compatibility
- Compatible with BBRight (46x79mm), PF30 (46x68mm) & 386 EVO (46x86.5mm) shells
- Colour: Black