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Shimano SM-BB91 Road Press Fit Bottom Bracket


Out of Stock


Bottom Brackets up! The Shimano SM-BB91 Road Press Fit Bottom Bracket is a top of the range complete press-fit bottom bracket assembly kit for Shimano HollowTech II and two piece road cranks. It comes with an inner cover for 86.5mm BB shells.

Key Features:

  • The cups are made from a fibre reinforced polymer material which reduces the risk of frame noise or sustaining any damage to your frame while running.
  • This set includes left and right hand cups and inner cover.
  • Sealed cups keep out dirt and water maintaining a long lasting, smooth running, maintenance free BB which is ideal for those not wishing to get their hands dirty through maintenance.
  • For use with a BB shell width of 86.5mm on road bikes.
  • Designed for a 41 mm cup diameter.
  • A press-fit installation system allows for hassle free easy installation.
  • You may wish to contact the bicycle brand (frame brand) manufacturer if you have a question in regards to BB specifications and assembly conditions.

Product Details

  • Shimano

Delivery & Returns

How long will it take to arrive?

Please check the stock availability notice on your item when placing your order. This item is: Sold out

Please remember to add postal time (2-3 working days) to obtain a complete estimate of delivery to your door.

How will I know it has been sent?

You will receive an email to confirm when your item has been sent.

You can also check the status of your order and individual items by accessing My Account details and following the prompts.

Please allow 10 working days from dispatch of your order before notifying us of any late deliveries.

It may be advisable to check with your neighbours to see if a parcel has been left with them, check any outhouses you might have where it may be left if it cannot fit through your letterbox and contact your local sorting office to see if the item has been returned to the depot as undelivered and awaiting collection.

If I'm not completely happy with my item?

Please see our returns policy.

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Customer Reviews

Where reviews refer to foods or cosmetic products, results may vary from person to person. Customer reviews are independent and do not represent the views of The Hut Group.




(2 Reviews)

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Shimano BB

Total :


This BB was just what I needed and well priced in comparison with the competition.

Mon Jun 29 19:30:20 BST 2015 by

Does what it says on the tin.

Total :


Excellent kit as always from Shimano. Fitting the BB (using the correct tools - I used Park Tool HHP-3 and the shims the come with the BBT90.3 removal tool) was a breeze and there is no longer an annoying creak from my BB. I fitted one side at a time to reduce the possibility of misalignment. In anyone's book, that should be considered a result! Note: I was replacing an FSA MegaExo BB that came with the bike, which was also fitted with an FSA Gossamer chainset. I never liked this chainset as the shifting was always very sloppy. So, when it came to changing the BB, I decided to go with Shimano as the plan was to eventually replace the chainset with Shimano Ultegra. The reason I state all of this is, despite extensive research, the spindle diameter between the FSA and Shimano is different - the FSA was too wide for the Shimano BB, which meant that I had to change the chainset at the same time. This was no biggie for me as I wanted to make the change anyway and I just had to do it sooner.

Tue Dec 03 16:20:24 GMT 2013 by

Shimano SM-BB91 Road Press Fit Bottom Bracket

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Shimano SM-BB91 Road Press Fit Bottom Bracket