Rotor BB30 Converter

Outer Diameter Bottom Bracket Bearing
43.70 7.12 discount
Currently out of stock
Expected: This week

  • Free tracked shipping over 75.00€
  • Trustpilot review 9.4 out of 51.659 reviews

Pros & Cons

  • Thanks to this bottom bracket one Shimano crank can be placed in a frame with BB30 fit.
  • The bearings in this bottom bracket are very durable.
  • This bottom bracket prevents your BB30 frame from cracking.
Read more on what our customers have to say about this product


Brand Rotor
Suitable forRace
Bottom Bracket Width68 mm
Bottom Bracket Diameter41.96 (42) mm
Outer Diameter Bottom Bracket Bearing44 mm
Type of axle 24 mm (Hollowtech II)
All specifications


Rotor BB30 bottom bracket converter. With this bottom bracket converter you can mount a regular BB24 crankset in a BB30 frame. This set reduces the diameter of the bottom bracket from 30mm to 24mm. A new advanced labyrinth seal ensure a smooth rotation of the cranks. The bearings are well protected against dust, water, and mud. New cups, completely black.

Suitable for all conventional BB24 cranks like the Rotor, Shimano, and all Shimano-compatible brands. For a 68mm wide bottom bracket. Once assembled, the distance between the outer points of the bearings measures 91mm. Mountable with Shimano TL-FC32 bracket tool. Tighten to 40 Nm.

Frequently bought together

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29 reviews

9 reviews
Suitable for Race MTB / Race MTB Race
Bottom Bracket Width 68 mm 68 mm 73 mm 73 mm
Bottom Bracket Diameter 41.96 (42) mm 41.96 (42) mm 41.96 (42) mm 41.96 (42) mm
Outer Diameter Bottom Bracket Bearing 44 mm
Type of axle 24 mm (Hollowtech II) BB30 Dub Dub
Colour Black Silver Black
43.70 31.51 32.48 43.66
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9.0 / 10 Average from 29 reviews | Write a review

9.0 / 10

29 reviews


  • Smooth bearings (2)
  • easy to install (2)
  • Feels good quality (1)
  • easy to fit & remove (1)


  • Non (2)
  • can not get replacement bearing covers (1)
  • Would have liked Red Anodised (1)
  • Can't see replacement Bearings Advertised for sale (1)

Most recent reviews

10 / 10

Glenn, 8 November 2017

A great quality solution

Easy to fit. Great quality bearings. Loads better than a shimano B.B. with adapters.

10 / 10

Martin, 10 April 2017

Very good

Had a kcnc adapter, this rotor adapter is some much smoother , seems well built , let's see if bearings last longer , great service from mantel and good packaging


  • Smooth bearings
  • Easy to install
  • Feels good quality


  • None

5 / 10

Keith, 9 April 2017

Best on-line price for this BB.

Care is needed to ensure the plastic covers protecting the bearings does not come off when pushing the crank axle through the bottom bracket. I've had to buy two of these BBs, because when fitting the first one a plastic cover came off and when re-fitting it it crumpled. I've taken a cover off the second BB to replace the crumpled one. The low rating is due to the problems with installation. (I've installed many BB and I am a competent mechanic and this has been the first I've had to buy a second BB for spares.) Operationally it's a great BB and runs smooth.

9 / 10

Anthony, 28 February 2017

quality item

Nicely made item just need to see how long the bearings last!


  • easy to fit & remove

10 / 10

Simon, 6 October 2016

Beautifully engineered

Really smart looking, very smooth bearings and a great design solution. Top product.


  • Cheaper than Praxis
  • Well built
  • Good looking

All specifications

Additional information

• Road version