what the title says. the spindle width of the bb is 110mm but im struggling to find cranksets for 110mm so can i just buy 123mm and use it?
Can I use a 123mm square crankset on a 110mm spindle bottom bracket?
Bikeman69
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A little confusing... Are you asking about BB's? I'll assume so and say, a crankset doesn't care about BB spindle length but your chainline may be less than optimal. In other words, if you use a 123mm wide BB and the frame's designed around 110mm, back pedal and the chain goes all over the cassette.
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Reading your other posts, you're taking this 1997 Specialized Hardrock to a 1x7.
You should be ok using the wider spindle. On the off chance you're not, make sure you get a crank setup with a replaceable chainring so that you may use spacers.
Personally, were I doing it, I'd get something like this:
BOLANY Mountain Bike Crankset MTB 1x Square Taper Crankset 104 BCD 170mm Crank 32/34/36T Compatible with Shimano, SRAM, FSA Amazon.com
That cartridge has a 118mm spindle and will take spacers if needed, but I really doubt you'll need them.
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There's a good chance that the chainring(s) will hit the frame and not turn at all if the BB spindle is too narrow. If the ring clears the frame, the shifting will be less than optimal. Bottom brackets are cheap and easy to replace, so just get a new BB when you replace a crankset. Anything else is a waste of time to save ... 20 bucks?
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Cranksets for sure do care about spindle length, especially square taper spindles that can't be adjusted right or left. If the op has a crankset that says it requires a 123mm bb then it's probably not going to work out so good with a 110.
Just get a 123 bb, they're only about $20
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It's a 1997 Specialized Hardrock 3x7.
He has a 110mm spindle length. He's asking if he can use 123mm.
From another thread, he's wanting to 1x the bike.
If he gets a crankset with a 118mm spindle length and a 30t crank, that should put the crank in approximately the same position as the existing middle chainring.
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Gotcha'. I think OP needs to clarify. I was going off the message body:
This makes it sound, to me, like he wants to buy a 123mm spindle BB, but I agree it could be interpreted either way.
Regardless, he mentioned in another post this is a 1997 Specialized with a 3x7 drivetrain that he's rebuilding to give to a college student, and that he wants to 1x it.
i ended up doing this most square tape cranks called for 123 mm bb where as mine was 110/111 mm. So I ordered a 68x123 and most square tape cranks work with this. And the spindle width def matters, but I went thru 3 of my local bike shops before I found a guy who knew this and agreed. 123mm cranks would thread completely to my 110mm bb
I just swapped by bb was looking at this but was concerned with off brand and reviews of the crank arm being snapped
Bought the bike for $50 was trying to keep it low as possible but there is hardly any cranks that use 110mm bbs. Had to upgrade the bb anyways
Was trying to do either or whichever was easier. Turned out not many cranks are speced for 110mm bottom brackets. So I upgraded it to what seems to be the standard of 123mm and there is thousands of options now thanks all for your help and insight
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Normally I wouldn't recommend it, but you said it was going to be a college bike and therefore not used hard.
Shimano(?) had an issue with snapping cranks a while back, so it's not just off-brand.
My Schwinn-based build currently runs a JG external bearing crankset. I was going to go with a genuine Shimano Hollowtech II, but there were a lot of reports talking about JG being decent. No complaints so far.
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So far, we still have no information on what the frame requires to keep a chainline.
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If you use the spindle that Shimano specifies for that particular square taper mtb crankset it will have correct chainline for 135mm rear spacing. As far as converting that to 1x it's anyone's guess.
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