I’ve been watching videos and trying to find articles on bottom bracket/crankset comparability. Is there a way to tell if the crankset pictures on my bike can be replaced with the one from the first picture, without having to take it apart to see?
by clemsonscj
5 Comments
I too have been struggling with this.
What I found so far is that there seem to be 2 broad standards: Shimano and SRAM.
Shimano seems to be mostly (all?) Hollowtech II with 24mm diameter spindles. That’s what I have on my bike and there doesn’t seem to be a ton of aftermarket options.
SRAM runs the DUB standard which I think is a 30mm diameter spindle. Seems to be a lot more options there.
So figure out what you have, Hollowtech II or SRAM DUB
Then figure out if your current BB is press fit or threaded.
Last figure out how wide your current BB is. There are a few width options so sometimes spacers are needed.
You can probably figure this all out without taking your crankset off the bike, but in the case of a Shimano crank, taking it apart is super easy.
First off, your bike APPEARS to be the standard 68/73 wide BSA threaded BB. Yours just uses internal bearings while the one posted uses external. Compatibility is fine without having any specs to confirm.
BUT that crank appears to be a 1x direct mount chain ring. So you’d lose your front derailleur and have to purchase a compatible chain ring. Since you have a 3x front chainrings, It’s probably a safe assumption you also don’t have a clutched derailleur either which is highly recommended for running 1x.
I have raceface spindle
It is better than Shimano crankset. Hollo tech crankset tend to break. It well known fact that Shimano won’t bother to fix its holotech cranks
No way is that bike running a modern mtb bottom bracket standard. I don’t think you’d be able to swap those cranks on at all. And those cranks look to be worth more than the bike you have…. Why not take the couple hundred you were gonna spend on cranks (maybe more if you were gonna do a 1x drivetrain conversion?) and just get a modern hardtail?
For the love of god, do not buy these knockoff 5dev cranks unless you have great dental insurance