sean.hwy

Hello, I am looking for people that have bought a
Hambini bottom brackets

I have watched lots of his video and people who have not purchased his bottom bracket often recommend them as an option to fix a bottom bracket.

For the people that purchased the bottom bracket, are you happy? Did it fix the issue several years down the road? I know I can put a new generic bottom bracket, lube, torque to spec and it will probably be fine for six months to year. I want to know if it fixed the issue permanently or just a band aid fix.

Barry2 

I purchased his "Racing" BB for a Cervelo R3. I put ~3,500 miles in it and then sold the bike.
I did the installation myself and had a few questions. His customer support was second to none!
Installation was really quite easy after I acquired the correct tools.
Had no issues with the BB.
If/when my current R3 needs a BB, I'll go going back to Hambini to get another.

In Summary
Weather you enjoy his youtubes or not, I can't fault his products or support.
The fact that once the BB is installed the bearings are replaceable makes it all the more attractive.

Barry

Camilo

Barry2 I'm curious what the premium performance is that warrants the price? I happen to like his videos, fwiw.

rsbob 

You also might want to check out https://wheelsmfg.com/bottom-brackets.html

Barry2 

I'm English and have the same warped sense of humor, so I also enjoy the videos.

As for performance warranting price... Beats me.
I like the concept of having bearings that actually align correctly.
The BB that came out of the bike had a clip on plastic sleeve in the middle of the two metal bearing carriers.
Believe me, that plastic sleeve did nothing for the alignment, it was a dust shield.

So why buy a Hambini BB.
1. I intended to keep the bike a long time.
I still have the first road bike I built in 1979.

2. I could not find a better, money no object, alternative.

3. I really wanted one!

Barry

Barry2 

All of the Wheels BBright offerings appear to be TWO piece.
I don't want TWO piece !

Barry

PS - I really really wanted a BB designed by a 5yr old!

rsbob 

My sincerest apologies. Didn’t mean to upset you so.

Barry2 

Yes, I find two piece BB's quite distressful.

I think you've ruined my Saturday.



Barry

Racing Dan

BBinfinite have been making a very similar product for years. Somewhat cheaper too. Cant speak to either. Im fine with basic Shimano BBs at 1/10 the cost .. :-P

https://www.bbinfinite.com/pages/shop

Troul 

This. If my experience is short lived, I'll try to provide feedback addressing it in my own way. I don't suspect I'll be let down.

IMO, most that replace the BB & go with a different brand wait until the old BB has a hard failure. That might result in a compromised BB shell that any BB might not be able to correct or live long when used.

I'm going to replace the factory BB before it reaches a hard failure & hopefully everything checks out prior to installing the hambi once everything is disassembled.

GhostRider62

I wish Mfgs would say exactly what bearing they use.

It is too easy to blame the frame.

High quality industrial bearings are not cheap but they last much longer than the garbage 2 dollar bearings some use. OTOH......

I could never figure out why I could get much more power to the G3 Powertap hub meter on my Pinarello than on my Cervelo. Maybe, it is just crappy tolerances on the BB shell as Hambini documents on his Shiite scale. Same meter, same human, same hill. Always better on the Pinarello. Both with 172.5 Rotor cranks. Not just power but time to the top. Always better on the Pinarello. I had chalked it up to better fit, stiffer frame, the Italian mojo.

Barry2 

I suspect the faster one was Red or possibly it had a go fast stripe!

Barry

GhostRider62

One was gold magnesium and the other was red carbon. One had pressed fit BB and the other had cups that screwed in.

They were tested double blind with crossover and washout. The red pill lost.

jaxgtr

What Troul and Barry2 said. I was crapping T47 bearings on my Domane, so after the second set, I decided the Praxis BB was getting pulled. I was looking for the Hambini, but I decided to go with the BBInfinite as I could get that faster. I also wanted to make sure the bearings align straight as well. My experience with the BBInfinite has been nothing less than fantastic. Super simple to install and very smooth bearings.

Barry2 

Talking you you guys is a bad omen.

Did my annual strip, clean, wax, and preventative maintenance.
Drive side BB bearing is gritty to the point you can hear it.
Weird thing, the dust shield is incorrectly marked 6805 but the bearing is really a 24377.
6805 is the wrong ID for a Shimano crankset.

So, I’ve blown a bunch of money and expedited a Hambini Shimano Racing BB from the UK.
oh well, one and done (I hope).

Barry

Mackers

Yeah, that'd be wholly bottom bracket dependent though.
Shimano themselves have been using the 6805 bearings since 2003.

Barry2 

6805 are 25mm ID X 37mm OD X 7mm thick.
Shimano uses a 24mm shaft
I don’t get it, if you’re going to the trouble of making a bearing… you get the plastic dust shield wrong.
I guess I now know why my quality 6805 bearing has failed.

And I don’t really care, my tracking number estimates Hambini delivery Thursday!

Meantime, Kickr to the rescue.

Barry


EDIT: While I was pondering when my BB would arrive I did some searching.
Enduro BK-5410 seems to be the most cost effective replacement solution for about $30.
But, I'm certainly not cancelling my Hambini order to go with these replacement bearings.
Just thought it worthy of mention.

Numerozero

Hambini rates Enduro bearings as .... OK. There are better ones out there.

A lot depends also on the size and roundness of the bearing holders. If they're out, even high quality bearings will suffer a short life (and high friction).

The sad thing is, the tolerance requirements needed are not even that "tight".

And, yes, I'm a mechanical engineer.

Troul 

Aside from potential weight being a probability; I'm curious as to why needle bearings are not used in place of or in parallel with the ball bearings in a BB? Has a study been done to show how much side load is being place on the BB bearing assembly? I would not expect a lot of side load, & if there is a load, likely not much to impact needle bearings imo.

smashndash

I'll start by saying that anyone who can get a hambini BB should. I have one and it's everything you could possibly expect from a bottom bracket. Bike is stiffer, crank spins way better. Can't speak to BBinfinite but I'm sure they're great too.


What would needle bearings help with? BBs definitely see fairly large side loads when cornering and sprinting. Needle bearings are also slower and harder to make to the same tolerance as regular radial ball bearings, aren't they? And they're less tolerant of misalignment. The ID/OD of a BB aren't really constrained either.

if you're referring to pedals, needle bearings are used because you need low stack. The tiny balls used in pedals cannot handle the full radial load. It's a tradeoff.

Barry2 

Being a little impatient and not having my road bike ready to go stresses me out.
So I grabbed a couple of Enduro MR 2437 LLU B0 and popped one into the failed drive side of my soon to be replaced BB.

Those are some stiff bearings. I suspect a mixture of stiff grease and tight seals.
But beggars can't be choosers, and at least this bearing will not trash my Stages/Shimano cranks (a very expensive mistake should that happen).

For those local... RA Cycles in Walnut Creek had them in-stock.

Mackers

Well, you're half right.

Shimano does use a 24mm axle but on their bottom brackets they also use an external sleeve/bearing shield that steps the 6805's 25mm ID down to 24mm.

Actually they use the 6805N which is nice if you're looking for bearings for your 25mm Campagnolo Ultra Torque crankset.

Barry2 

There is no sleeve in mine. A 24mm O.D hollowtech II shaft runs in a 24mm I.D. bearing and that bearing IS marked 6805.
Myself and two bike shops stared at it in disbelief. Plus all 3 of us broke out the calipers and measured the darn thing.

sean.hwy

I have a 2021 Giant Revolt Advanced 2
https://www.giant-bicycles.com/us/revolt-advanced-2

Giants web link says:
Bottom Bracket Praxis M24 BB86, press fit



So, I think I need this one.
https://www.hambini.com/product/bb86...ottom-bracket/

Does that look right ?

I joined his wait list.

Barry2 

I looked at your choice and if it's BB86 you need, then you have indeed chosen a BB86 version.
I do however question why his BB86 offerings include a two piece screw together BB86 version.
I this maybe to get around a limitation found in some BB86 frames ?

I'd contact support along with your order number and bike details asking for clarification.
EDIT: I just read the description of the Two Piece... it "will fit in any BB86 frame and is especially suited for Giant Bikes".

BTW
Mine arrived today - Ordered Monday 6:32pm PST Arrived Thursday 12:59pm PST << That's what I call "Expedited"
I'm looking forward to installing it over the weekend.
Personally I like the Racing version. Those are a little more sturdy and tolerate an off spec frame a little better.

Barry