I have a BBright Frame, looking for a short crank (165) and a big gears (53/39)… and there are basically no aftermarket 24mm crank that will work.
I had great success with the wheelsmfg BB in the past… they don’t offer a BBright to 30mm. I think they could swap the bearing on request. just wandering it’s a good idea?
(fit, baring life, more creak, stiffness)
I was hopping to get a Rotor Aldhu… but somehow they decided that only the 30mm people need a 165…
But, why are people sticking with the 30mm standard if it create issues with bearings?
I’m assuming that there are some patent issues with 24 (shimano) and 24/22 (Sram)… but the is alot of option between 30 and 22 that will fix the bearing durability issue
I was hopping to get a Rotor Aldhu… but somehow they decided that only the 30mm people need a 165…
I was under the impression that the Uldu was made un 24mm with 165 arms as that’s what I wanted to get on my TT and 1x setup
but, why are people sticking with the 30mm standard if it create issues with bearings?
I’m assuming that there are some patent issues with 24 (shimano) and 24/22 (Sram)… but the is alot of option between 30 and 22 that will fix the bearing durability issue
Do 30mm Ceramic have the same issue?
I just really don’t bother with any other BBs if they’re not from BBINFINITE, best BB in the market! Have it on the trek, venge and now on my omni!!!
Whatever the crank just go bbinfinite they make every single combo for a 1 piece BB
But, why are people sticking with the 30mm standard if it create issues with bearings?
It’s only an issue when you try to fit a 30mm spindle into a frame BB shell that can fit a 41mm OD (outer diameter) bearing - such as PF86. THat is what 4130 means - OD and ID.
BB30 bearings have a 44mm OD. A BB30 frame shell takes 44mm, a PF30 expands that to fit a plastic sleeve around the 44mm bearing.
So where the 4130 gives 5.5mm for inner + outer race and bearings, the 4430 has 7mm. Which doesn’t sound like much except that the extra all goes on ball size.
IME Ceramic has the same issue, you should get a bit longer out of the bearings but it’s a non optimal setup so nothing can excel.
Ao where the 4130 gives 5.5mm for inner + outer race and bearings, the 4430 has 7mm. Which doesn’t sound like much except that the extra all goes on ball size.
Now that explain everything!!
BBinfinite are just too scary to install… i’m not doing that to my expensive frame. and it doesn’t address the problem above.
Just so we’re clear - BBright is a PF30 variant so the frame shell has a 46mm ID. Which means 30mm spindles are no problem.
As extra for experts - pressed in BBs need to be installed with a loctite that acts as a filler for all the rough patches you see in the carbon of the BB shell. The loctite makes up for the non ideal contact surface and it’s an adhesive. The thread together BBs just use grease for install as they don’t have the capacity to wriggle in the shell.
Basically you have a heap of options with BBright, just need to balance a few factors and install properly.
I had to use an 11.5mm spacer on the driveside with my Rotor 3D+ crank, but that’s nothing to do with that BB, just BBRight in general
He probably asked about the spacer because BBInfinite and some of the thread together BBRight bottom brackets are now coming with the DS of the BB extended out to eliminate the need for a thick DS spacer. This also moves the DS bearing out. Essentially widening up to BB386EVO width.
Yeah, I’m still cramming my Power2Max on a 3D+ crank into my Trek (BB86) and it’s not optimal. I change the BB every season; tried ceramic once and in the UK weather it lasted less time than steel! I really should bite the bullet and get a 24mm chainset now I have some Assioma pedals!
I have a BBright Frame, looking for a short crank (165) and a big gears (53/39)… and there are basically no aftermarket 24mm crank that will work.
…
If your goal is to find a 165mm 53x39t crankset, there are plenty 30mm crankset that will work with BBRight - in fact, BBRight is designed to work with 30mm because it’s a variant of PF30. So why insisting on having a 24mm spindle crankset on a BBRight frame (Cervelo)?
But they are EXPENSIVE!!! anybody else has try those
That would work with a 30mm crank. But keep in mind you have to also buy the Torqtite wrenches as they are proprietary. This makes the Torqtite even more expensive. I have used their BB386EVO to GXP conversion bottom brackets in a couple of builds with good luck.
I think the Wheels Manufacturing PF30 screw together bottom bracket would also work for 30mm cranks. It has just enough reach to work with the 79mm wide BBRight shell but requires pressing in half of the BB to get the threads to start.
If you go with a 24mm crankset then both Wheels Manufacturing and Torqtite make BBRight to 24mm conversion bb’s with the DS bearing set in an outboard shell. https://wheelsmfg.com/...no-cranks-black.html
There is also the Token Ninja bottom bracket series. These are aluminum screw together shells with delrin plastic rings pressed over the flange areas where they sit inside the bike frame BB shell to allow a bit tighter fit. These BB’s typically have to be ordered from overseas as they don’t seem to have wide US distribution. The pricing is a lot lower the other options listed above. See the BBRight to BB386 option under this listing: https://www.ebay.com/...Q&frcectupt=true
I didn’t want to start another thread just to get your info on this, but I’ve been looking at a Vision Metron Aero crankset. However they are BB386 Evo and I have a Trek Speed Concept with BB86, I can’t seem to find much info on the internet if that combination is even possible with certain bearings or spacers or idk what. Could you help me out?
I didn’t want to start another thread just to get your info on this, but I’ve been looking at a Vision Metron Aero crankset. However they are BB386 Evo and I have a Trek Speed Concept with BB86, I can’t seem to find much info on the internet if that combination is even possible with certain bearings or spacers or idk what. Could you help me out?
BB386EVO utilizes a 30mm crank spindle diameter. Trek’s BB86/90 uses 24mm diameter crankset spindles. 30mm spindles use 42mm o.d. cartridge bearings while 24mm spindles use 37mm o.d. cartridge bearings. There are limited bearings available that have a 37mm o.d. with 24mm i.d. that will allow fitting a 30mm spindle into a bottom bracket designed for a 24mm spindle, but these have very low load carrying capabilities and don’t last long in this application.
As SummitAK said - 386 into BB90 is technically possible if you hunt down some bearings and bodge some dust covers. But you would want to be ordering a lot of bearings for the frequent replacement required (and they’re not cheap).
As I mentioned above - 41mm OD with 30mm ID don’t last long - cut that OD down to 37mm and it’s only going to be worse.
The Enduro does exactly the same thing as the wheels PF30 for 2.5x the price
I haven’t tried Enduro because Wheels going so well for me and my clients. Much better durability than Hawk (lowest friction steel bearings in past testing)
