Hambini Racing T47i T47-86.5 Bottom Bracket Shimano Crankset (Trek)

(21 customer reviews)

£268.00 Ex. VAT

This bottom bracket is designed to interface a Shimano 24mm Hollowtech 2 Crankset with a bike frame that uses a T47 Bottom Bracket (86.5mm wide). This is often called Threadfit or T47i. This will also fit cranksets from the likes of Rotor, FSA, Magene and others who use a 24mm axle with 90.5mm DBCA – this is often called Shimano compatible.

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SKU: T47-86-Shimano Category:


This bottom bracket is designed to interface a Shimano 24mm Hollowtech 2 Crankset with a bike frame that uses a T47 Bottom Bracket (86.5mm wide). This is often called threadfit or T47i and a variant of this is used on Trek bikes.

  • T47 x 86.5 Threaded. 47×1.0mm
  • Will work with TREK T47i bikes, these have an 85.5mm wide shell
  • Drive side has a Left Hand Thread, Non Drive Side has a Right Handed Thread
  • Designed for Shimano Hollowtech 2 Axles (Sora, Tiagra, 105, Ultegra, Dura Ace). This will also fit cranksets from the likes of Rotor, FSA, Magene and others who use a 24mm axle with 90.5mm DBCA – this is often called Shimano compatible
  • The drive and non drive sides are aligned via an internal male/female sleeve
  • Top of the range 6806 SKF/NTN/FAG/NSK bearings fitted as standard
  • This bottom bracket has been designed to offer easy servicing, it is not a throw away item, it has been designed to allow easy changing of bearings which are a standard part
  • Non contacting Seals
  • Tool Requirements, these are shown on the drawing in the picture gallery
    • 52mm Outside Diameter
    • 12 Notches
    • 51.7mm PCD (Pitch Circle Diameter) R25.85mm
    • 3.5mm notch diameter
  • A suitable tool is available here

Additional information


21 reviews for Hambini Racing T47i T47-86.5 Bottom Bracket Shimano Crankset (Trek)

  1. Robert McKee

    Great piece of hardware, I gave it to my custom frame builder and he was blown away by the quality and precision of the bottom bracket. I have two with BSA threading on my other bikes and they preform flawlessly

  2. Jim Langley

    So I bought this after watching several hours of a loud mouthed 5 YO on YouTube. I am totally satisfied with my purchase. Once you pick this up and use the fitting tool that is also listed you’ll realize what precision engineering is. This is a different league. I have used so called top of the range parts on my bike over the years and they have been of varying quality, this blows them into the weeds. He is loud and foul mouthed but it’s for show. Pre purchase sales and after sales are easily the best – fast, courteous and technically articulate. Buy one, you won’t be regret it.

  3. Pavel Vitous

    Fitted like charm (Trek Emonda). Not much to add. BB is just spectacular 🙂

  4. Karim

    Let me start this review by saying I previously had a Chris King in the bike. That has since been binned and replaced with this. I bought this and the fitting adaptor together. Everything arrived quickly and the experience pre sales, during sales and after sales has been the best I have ever come across.

    The bottom bracket fitted with ease, the internal sleeve that aligns it is very clever, I was amazed how much play there was with the Chris King versus the Hambini. There is zero backlash when the center sleeve engages. I had originally intended to take this to a bike shop to be fitted but the tooling and design make this so easy that I did it at home.

    Out on the bike, it has been without fault, even under extreme loads.

    Before purchasing, I was initially skeptical as to whether buying a bottom bracket from a lunatic on YT was a good idea. In hindsight, I should have done it sooner.

  5. Martin Bradwell

    It only took a couple of minutes to fit. The center sleeve design that goes into the other side is very clever. It was surprising how much slack there was in plain threads.

    Don’t waste your time with a bike shop. Save yourself some money, buy the Hambini Tool for this BB and wrench it in.

    Arrived in the US in about a week. I am totally satisfied with my purchase, everything is extremely slick. This is how it should be.

  6. Thomas B.

    Haven’t installed it yet but just holding it shows the craftsmanship and precision that goes into making this bottom bracket. Looking forward to the install.

  7. JS Park

    I don’t usually bother leaving reviews but this product is an exception. I initially had some reservations about buying a product from a self-proclaimed 5 year old. However, upon emailing him I found him to be courteous, polite and his technical knowledge is another level.

    The bottom bracket came in a plain box. it was well packed and arrived with no damage. The fitting was without issue. I also bought the Hambini Tool T6806 and this fits the BB perfectly. The center section is used for aligning between sides and is not something I have seen in any other design.

    For performance, I cannot fault it. The feel is noticeably more direct than the OEM Praxis unit that it replaced. It feels like there is less drag as well. A 5 star product, backed by 5 star service and a 5 year old to go with it.

  8. Anonymous

    So much smoother compared to the old BB. Love it!

  9. John Buchan

    I cannot believe how good this spins. It is so smooth and easy to pedal over my previous BB. The machining is so good too. Worth every penny. Thanks Hambini 🙂 ps: For being designed by a 5 year old hair dresser banger, I am very impressed.

  10. Rui M.

    Great product and great costumer service as Hambini is always available to answer your questions via email.

  11. Dave Sarcevic

    Thank you, Hambini. I am extremely satisfied with my BB. The only problem I had was removing my older Praxis BB, which I didn’t realize my Park Tool T-47 removal tool wouldn’t work on. Installation was very easy and sensical. I rode a nonstop 500 mile ride days after installation and and noticed no problems. I actually didn’t have to think about it. Which is a sign of a high quality part where it is doing what it was designed for. I appreciate your videos along with your no holds barred honesty and take no BULLSHIT attitude. I highly respect your professional opinion and now your high quality BB!

  12. Anonymous

    Really nice piece of kit. I thought it was silly expensive and then it came. Nope, high end machining just costs this much or more…it is really a great BB.

  13. Lars Wittrock

  14. Thomas M.

    Fantastically made BB. Thankfully my Emonda SLR frame is well made, so took the BB without issue. I put a single wrap of teflon tape on the threads before inserting, as there have been problems with t47i BB’s coming loose in Trek frames (not a Hambini issue – this is a recent recommendation from Trek itself regarding BBs).
    The Hambini BB spins like a dream, totally different league to the Praxis that it has replaced. Honestly, if I had to choose between an expensive wheelset or a Hambini BB, I would pick the latter. It’s only once you’ve experienced it that you can know. Just like any top class hairdresser.

  15. Brian C.

    Fast BB and great service.

  16. Kerry P

    It’s difficult to see the difference from the pictures as it looks like a 5 YO took them haha. But pick one up, fit it, ride it and then you’ll know why his bottom brackets have such a good reputation.

  17. Julius K.

    I had a few queries and discussed these with Hambini over email. I Ordered it on the Thursday, and it arrived at my door on Monday afternoon in southern California.

    The service from here is out of this world. Very slick and professional. I cannot fault it. Well done Hambini and his hairdresser

  18. David

    This is a bottom bracket…the likes of which can only be found here! Precise and built to last.

  19. Jeroen

    This replaced the Praxis Works unit on my 2022 Trek Checkpoint SL. Had some questions before purchasing which Hambini answered quickly, courteously and adequately. The BB is exquisite, beautifully made and went together in my frame very easily with the Hambini tool. Because I mostly ride gravel on this bike, I opted for fully sealed bearings, great that Hambini offers this at no extra cost. Very happy so far after about 100km, have to put in some more but I’m expecting nothing but buttery smooth pedalling :). Easily the best purchase I’ve made in a long while!

  20. David B.

    Extremely Well made, bearings run super smoothly, tight tolerances. A Work of Art, -well packaged for shipping, Excellent communication, very knowledgable, courteous and very prompt in replying to any questions.

  21. Gregory P.

    Always excellent. Pinnacle of BB manufacturing

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Q & A

Can I use bottom bracket socket from Wheels MFG [1] to install this bottom bracket? Or I need a dedicated tool? [1] https://wheelsmfg.com/presses-tools/bottom-bracket-tools/bb-socket.html Milosz Pogoda asked on March 17, 2024

I can't confirm if a Wheels tool will work, they don't publish their spline pattern.

admin answered on March 17, 2024 store manager
(1) (0)
Does this fit the 2023 Look 765 Optimum? Santeri asked on April 11, 2023

Yes it does. Thanks Hambini

Hambini Engineering answered on April 11, 2023 store manager
(2) (0)
I'm looking at a Seka Exceed RDC frame. They say it;s a T47 85.5mm. Could you jim'll fix one for Shimano hollowtech/ Ultegra crankset please? Mark Evison asked on February 28, 2023
(0) (0)
What are your thoughts on using this BB for dirty, wet and dusty riding ? I am using a Praxis T47IB and the seal isn't perfect so dust has gotten in and mirror polished my shimano GRX crank spindle and also likely worn the spindle-BB interface. Nguyen asked on September 9, 2022

It can be ordered with fully contact sealed bearings and that will provide the maximum sealing. Some people for gravel use do specify these. It is a no cost option.

admin answered on September 9, 2022 store manager
(1) (0)
I just purchased this, but was informed there is a ceramic bearing option. Is that true & how can I update the order to reflect the change? Dick asked on March 18, 2022

No Hambini Bottom Bracket has ever been available with ceramic bearings. Ceramic bearings are not suitable for this application, the spindle speeds are not fast enough and the road vibration would cause them to pit the races.

admin answered on March 18, 2022 store manager
(0) (0)

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