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ROTOR UBB 4630 Bottom Bracket - PF30

ROTOR Bottom Brackets

ROTOR UBB 4630 Bottom Bracket

Josh Matthew August 18, 2025

$115.00

Works with PF30, BBRight or 386 EVO bottom brackets

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ROTOR UBB 4630 Bottom Bracket

The ROTOR UBB 4630 Bottom Bracket adapts any PF30, BBRight or 386 EVO bottom bracket shell to fit a 30 mm diameter crank spindle. However, what is unique about ROTOR’s UBB, is that it features external bearings and uses a threaded sleeve to lock the bottom bracket cups in place. This offers several advantages over a more traditional press fit bottom bracket. The ROTOR UBB helps provide a uniform, smooth spin to the crankset, it helps eliminate any unwanted noises and creaks; it works to improve bearing life; and the external location of the bearing results in increased shell stiffness.

 

ROTOR Bottom Bracket Comparison 

ModelBearingsPriceShellCranksetsWeight
ROTOR BSA 30MM Bottom BracketSteel | CeramicSteel: $65 | Ceramic: $200Fits BSA (English) threaded 68/73 mm shellsFits 30 mm cranksetsSteel: 96 grams | Ceramic: 89 grams
ROTOR ITA 30 Bottom BracketSteel | CeramicSteel: $65 | Ceramic: $200Fits ITA Threaded 70 mm framesFits 30 mm cranksetsSteel: 54 grams | Ceramic: 49 grams
ROTOR BB1 BSA 24MM Road Bottom BracketSteel | CeramicSteel: $50 | Ceramic: $135Fits BSA (English) threaded 68 mm shellsFits 24 mm cranksetsSteel: 93 grams | Ceramic: 91 grams
ROTOR BB1 ITA 24MM Road Bottom BracketSteel$50Fits ITA Threaded 70 mm framesFits 24 mm cranksets91 grams
ROTOR T47 30MM Bottom BracketSteel | CeramicSteel: $65 | Ceramic: $200Fits T47 68 and 73 mm shellsFits 30 mm cranksetsSteel: 103 grams | Ceramic: 97 grams
ROTOR T47 24MM Bottom BracketSteel | CeramicSteel: $65 | Ceramic: $200Fits T47 68 and 73 mm shellsFits 24 mm cranksetsSteel: 120 grams | Ceramic: 113.5 grams
ROTOR UBB 4630 Bottom BracketSteel$115Available for PF30, BBRight and 386 EVO framesFits 30 mm cranksets106 grams | 109 grams | 109 grams
ROTOR Press Fit 4130 Bottom BracketSteel | CeramicSteel: $50 | Ceramic: $200Fits PressFit 86/89/92 mm shellsFits 30 mm cranksetsSteel: 54 grams | Ceramic: 49 grams
ROTOR Press Fit 4630 Bottom BracketSteel | CeramicSteel: $65 | Ceramic: $175Fits PF30, BBRight or 386 EVO shellsFits 30 mm cranksetsSteel: 106 grams | Ceramic: 100 grams
ROTOR Track BSA Threaded Bottom BracketSteel$105Fits BSA (English) threaded 68 mm shellsAvailable for 24 mm and 30 mm cranksets108 grams | 119 grams

Compatibility

Works with PF30, BBRight or 386 EVO bottom brackets.

Specs

  • Shell Width: 68/79/83/86.5 mm
  • Type: PF30/BBright/386EVO Threaded
  • Axle Size: 30 mm
  • Weights: PF30 - 106 grams | BBRight - 109 grams | 386 EVO - 109 grams
  • Built using 7000 series aluminum alloy

Tools Needed for Installation

You will need the following tool for installation of this product.

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