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

(11 customer reviews)

£268.00 (£321.60 UK Customers)

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

3 in stock

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)
  • 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

Crankset Type



11 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!

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Q & A

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 9 September 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 9 September 2022 store manager
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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 18 March 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 18 March 2022 store manager
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Will this fit a 2021 Trek Emonda SL frame? (Thanks for all your good work!) Dean asked on 29 October 2021

Yes it will

admin answered on 31 October 2021 store manager
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Any possibility of paying in installments in the near future? Barry asked on 21 October 2021

It's a good idea, I'll have a look.

admin answered on 23 October 2021 store manager
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Are you considering a 30mm (ROTOR ALDHU) version of the T47 internal threadfit for TREK frames? John Decker asked on 18 October 2021

Yep, that should be within the next couple of weeks.

admin answered on 19 October 2021 store manager
(0) (0)

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