Hambini Racing BSA Bottom Bracket Shimano Crankset MTB 73mm

(4 customer reviews)

£211.00 (£253.20 UK Customers)

This bottom bracket is designed to interface an MTB Shimano 24mm Hollowtech 2  Crankset with a bike frame that uses a BSA Bottom Bracket.

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SKU: BSA-MTB-Shimano Category:


  • BSA 73mm Threaded (1.37 x 24TPI), Often rereferred to as English, BSC or ISO threading.
  • Drive side has a Left Handed Thread, Non Drive Side has a Right Handed Thread
  • Shimano Hollowtech 2 compatible
  • The drive and non drive sides are aligned via an internal male/female sleeve
  • Top of the range 6805  SKF/NTN/FAG/NSK bearings fitted as standard
  • Full Contacting Seals
  • Installation and Removal Tool is available here

The road version of this bottom bracket was featured in the video shown below. The unit featured in the video was silver, the production unit is black.


Installation and service video is shown below

Additional information

Crankset Type






4 reviews for Hambini Racing BSA Bottom Bracket Shimano Crankset MTB 73mm

  1. greg rodgers

    love the product, but more importantly love the man who is a voice for we cycling punters. If you ever need crowd funding to deal with some of the Twats in big cycling count me in. Hope my little purchase in some way helped the cycling quality control cause, or hell straight to the betting shop what ever grabs your fancy. You be da man. Can”t wait for the next” Hello Hambini fans”.

  2. Petri

    5 stars across the board. Leaps and bounds ahead of the Shimano BB that was removed. It installed in just a few minutes and what a difference. This 5 year old is the bottom bracket king.

  3. Jake B.

    Very high quality bb. Huge improvement over oem.

  4. Matthew

    The part arrived in a children’s yogurt box (completely on-brand for Hambini) but packaged very well and carefully nonetheless – I was happy about the reused packaging. The install was very easy with a YouTube video to accompany after a little digging. There was a very perceivable difference (for the better) in quality between the old bottom bracket and Hambini’s. His product is very high quality and the design is very well thought out. Riding on it is great. It seems to keep dirt out better than the old BB did. 5/5 would buy again.

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Q & A

Curiosity: Why don't you use 24 x 37 x 7 bearings, where 24mm shaft fits directly on the inner ring of bearing. Wouldn't it be a more durable fit than plastic sleeve between shaft and bearing? Tomasz K. asked on 8 April 2022

Bearings are hardened and will trash the axle, the delrin cup is there as a sacrificial element to avoid axle damage.

admin answered on 8 April 2022 store manager
(0) (0)
Can it fit Sram Eagle GX cranks 24mm spindle diameter? My frame is a boost frame specialized epic expret. Shaun asked on 21 March 2022

It won't fit I'm afraid, you'd need a GXP specific BB

admin answered on 22 March 2022 store manager
(0) (0)
Is the installation tool a proprietary fit or will a standard shimano bottom bracket wrench work to install your bottom bracket? M asked on 21 March 2022

The bottom bracket can usually be installed with other tools but the fit on them does vary considerably depending on how they were made.

admin answered on 21 March 2022 store manager
(0) (0)
When will stock arrive for the 73mm bb. Thanks mate. Shaun asked on 17 March 2022

in about a day

admin answered on 17 March 2022 store manager
(1) (0)
Do you also manufacture a Hambini Racing BSA bottom bracket for a 30 mm crank? Roy asked on 7 August 2021

this will be coming within a month

admin answered on 8 August 2021 store manager
(1) (0)

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