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BB386EVO to Shimano Classic Bottom Bracket

£110.00

BB386EVO to Shimano Classic Bottom Bracket

(12 customer reviews)

£110.00

This bottom bracket is designed to interface a Shimano 24mm Hollowtech 2 Crankset (Sora, Tiagra, 105, Ultegra, Dura Ace) with a bike frame that uses a BB386EVO Bottom Bracket (46mm Nominal Inside Diameter X 86.5mm Wide).

1 in stock

SKU: BB386EVO-Shimano-Classic Category:

Description

This bottom bracket is designed to interface a Shimano 24mm Hollowtech 2 Crankset (Sora, Tiagra, 105, Ultegra, Dura Ace) with a bike frame that uses a BB386EVO Bottom Bracket (46mm Nominal Inside Diameter X 86.5mm Wide).

  • 6061 Aluminium Alloy (Most corrosion resistant aluminium alloy available)
  • Polished aluminium finish
  • Aerospace tolerances, guarantee a no slop fit with good retention
  • One Piece design is inherently creak free
  • Bearings from NTN, NSK, SKF, Koyo or FAG/INA
  • No Hammers to install or remove
  • Fully serviceable Design, the bearings are designed to be replaced quickly and easily
  • 1 year warranty on the bottom bracket body
  • Supplied with fitting adaptors, a press or studbar in M12 size will be required
  • All Hambini one piece bottom brackets require obstruction free access to your bottom bracket shell Click Here for Bike Specific Application guide

Hambini Bottom Brackets are amongst the lowest friction bottom brackets in the world. They are used by recreational cyclists, road racers, triathletes and time trialists from around the globe. They are of proven design and are manufactured to Aerospace tolerances using Aerospace materials by an Aerospace Engineer.

These units are of a one piece construction which makes them inherently resistant to creak, they will maintain perfect bearing alignment and function under loads in excess of 4000W.

All Hambini bottom brackets can be installed and removed with a conventional bearing press, they use a controlled method of installation using the recommended fitting adaptors, they require no hammers or specialized tooling for removal. Additionally, the wearing component – the bearings – can be removed and serviced in situ. Essentially the bottom bracket has been designed to be fully rebuildable

Please click on the reviews to get more opinions

Spin Test

Spin tests are not good measures of friction as the bearings are unloaded but this video highlights the benefit of good bearing alignment on friction and bearing life. This particular bottom bracket had completed 10,000km.

Comparative Friction

The graphs below show how Hambini bottom brackets perform in comparison to the bottom brackets of other manufacturers

The test conditions model real world cycling and more importantly mimics realistic frame tolerances. All of these tests have been conducted with an eccentricity of 0.1mm which is generally the maximum permitted in frame specifications – the reality is tolerances have been known to be much worse than this.

Misalignment is more critical to friction than the type of bearing ball material, a slight misalignment can easily outweigh the difference between a top of the range NTN bearing and a mediocre ebay no name bearing. The results show that bottom brackets which have an element of structural linkage between the drive and non-drive sides (one piece/threaded etc) perform much better than those which are multi piece.

Average Power Consumption - Hambini, CeramicSpeed, Kogel, Praxis

The high torque and low RPM of pedalling causes high Hertzian contact stressing on bearing surfaces which cause friction levels to change over time. Those bottom brackets which have used ceramic bearings, start off with fairly low levels of friction but over time their friction increases dramatically. The super hard ceramic balls grind a track into the comparatively soft bearing races causing friction to increase. This would be analogous to trying to drive a locomotive train on a road, the wheels would cut grooves into the road surface due to the huge difference in surface hardness.

A Hambini BB is a one piece bottom bracket. It actively contributes to the stiffness of the bike’s pedalling platform. Threaded and multi piece bottom brackets have an element of play in their design so they do not contribute anywhere near a comparative level of stiffness. Reviewers of Hambini BB’s often comment on their feeling of improved stiffness, this is due to them being one piece and undergoing a proprietary heat treatment process. This makes them stronger and stiffer. This is a difference the end user cannot see – but they can feel.

Bottom Bracket Stiffness Comparison Hambini, CeramicSpeed, Kogel, Praxis

Installation

For installation, you will require a bottom bracket press or a piece of M12 studbar and some nuts. A video showing the method of installation is linked below, the picture and text installation guide is available here

Removal

For removal, you will require a bottom bracket press or a piece of M12 studbar and some nuts. A video showing the method of removal is linked below

Service

Hambini Bottom brackets are designed so you can service the wearing component (the bearings) quickly and easily. The bottom bracket service procedure is shown below

Design Process

The process through which Hambini Bottom Brackets are designed is shown in the video below


Frequently Asked Questions

I have rounded up some of the most frequently asked questions that I get asked and put them in the list below

Q. Why are Hambini Bottom Brackets more expensive than everybody else?

A. Hambini Bottom Brackets are made in the UK where costs are considerably higher than the far east. Additionally as a private individual, I do not have the economies of scale that contract manufacturing companies are able to obtain.

Q. What is the difference between a Hambini Bottom Bracket and a mass market bottom bracket?

A. From a technical perspective, mass market bottom brackets are made to poorer tolerances and are therefore more likely to creak or result in poor bearing life. They are also designed to look aesthetically pleasing but compromise on areas which you cannot see (such as the fits, bearings and heat treatement). Hambini Bottom brackets are completely machined as opposed to moulded (Shimano/SRAM/Plastic). The Hambini Bottom Bracket tolerances are typically 10x tighter than Shimano/SRAM/Rotor/RaceFace/Token. Mass market bottom brackets often use poor quality bearings from the far east to maximise their margin. As an example, the bearings on Hambini Bottom Brackets (which are typically NTN) cost more than an entire bottom bracket from RaceFace/Token/SRAM.

Q. Why don’t you use Ceramic Bearings?

A. I have found ceramic bearings to have poor performance in bicycle applications. The ceramic bearings are not 100% ceramic, they are hybrid. A Hybrid bearing consists of ceramic balls sandwiched between a steel innner and outer race. The ceramic balls have a tendency to cut a groove into the steel and this results in poorer performance after only a few 100km. The majority of friction (>80%) in a bearing comes from the seal, grease and cage type. The ceramic balls make up a small fraction of the friction and have the negative effect of rapid bearing degradation. These are the main reasons I do not supply bottom brackets with ceramic bearings

Q. What is the difference between the Racing editions and the standard units?

A. The Racing Bottom brackets are made with superior materials, they are stiffer and slightly lighter. Racing bottom brackets are equipped wih low friction bearings. Racing bottom brackets have approximately 20 percent less friction than Classic units. The total friction is very small and would be difficult to notice when riding but nonetheless there is a measurable difference

Q. How long will the bearings last?

A. I cannot place a life on the bearings as life is largely dictated by the conditions they are subjected to. Having high loadings will increase their rate of wear as will riding in wet conditions. The bearings in all Hambini Bottom brackets are branded and meet minimum ISO standards so they are the best that are commercially available. Typical usage will be somewhere in the region of 2000km to 10,000km. As an example, those who watch my youtube channel will know my fastidious maintenance schedule which consists of weekly jet washing – I change the bearings twice a year, ie 8000km between changes. Due to the low speeds involved keeping them clean is more important than keeping them greased.

Additional information

Crankset Type

Shimano

Frame

BB386EVO

12 reviews for BB386EVO to Shimano Classic Bottom Bracket

  1. K Ballas

    I bought this for my Time bike frame. It fitted easily and has not creaked at all. The cranks spin freely. This is exceptionally well made.

  2. LeedsJim

    I am an avid viewer of Hambini’s YouTube videos and his engineering. This gives you an impression of what the man is like and despite coming across like a bumbling idiot, he is very professional when he needs to be. Service and product were both first class. Very helpful and his attention to detail is amazing. The bottom bracket is amazing. The cranks feel so free and on load there is not even a hint of creak. The only dilemma around this is the price. It is at the very top end but I would not think twice about buying another one. There is night and day difference between this and anything else on the market.

  3. Jim Saunders

    I bought this to go into a chinese open mold frame. I was a bit worried that I was going to have one that slid out but this went in and has not given me any trouble since. Very well made and customer support is the best in the industry.

  4. Ed

    I tried everything and said to Hambini that this/he is my last hope. I had three different bb’s installed, tried with dry, greased, glued ways, but creaking just got worse. I found out that frame is also very poorly made… But, then I ordered Hambini bb (which was also stolen and later found at package courier company and then delivered without one bearing adapter… Hambini sent me another adapter and i got it in just few days..). I also damaged one of high class NTN bearings when installing bb into the frame (my fault) and ordered another at Hambini (got it in 5 days and Hambini responded to my emails even on his holiday!) But finaly, i put all together and: NO CREAKING anymore! No creaking at all. I made few tests outside and on indoor trainer and there are no annoying clicks anymore! Hambini bottom brackets should be the only standard for press fit frames! Overall experience (quality, customer support, patience, solutions, advices, guides, youtube channel, etc…) is just better than perfect! Thanks to Hambini and his only solution to get rid of annoying creaking finaly!!

  5. BEM98

    This bottom bracket is a quality piece of kit. It comes in a generic brown cardboard box which doesn’t set you off with the best first impression. Once the box is opened and you see it. It is as good as everyone says it is. Very well machined, a joy to touch and super smooth. It fitted my Time bike with no issues and I was pedalling away shortly after. It is much stiffer than the original and so smooth. It’s so smooth. Technical support from Hambini is very good, he is quick, polite and courteous despite my noob type questions. Cracking youtube channel as well! Thanks Hambini

  6. Kenny Y.

    Received in one week from across the pond, very impressive response time. Had a few questions and the response time was uber quick from Hambini. I would buy anything engineered and manufactured by this crew. Thank you

  7. Kenny Y.

    Great customer service, quick response time to any questions or concerns. Uber fast shipping. I would by anything manufactured by this crew. Thank you

  8. Mario

    The BB is working great, no creaks, low friction, zero maintenance. So happy with it. Thanks Hambini, my Time Skylon is finally rounded.

  9. Hang Loose

    I’ve bought this for a Chinese frame looks good made well, just waiting to buy Hambini installing a removal kit when is it in stock.

  10. Ed

    After 50 hours and over 1500 km on indoor trainer (also constantly exceeding 1000 watts of load on this BB) still no single creak! Hambini, thanks again!;)

  11. Tomasz

    Superb quality!!!!!!! I wish that all bike parts were done with such precision!

  12. Anonymous (verified owner)

    Not installed yet but looks good. Package was well protected. Looking forward to trying it

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