M8000 crankset and a xt bottom bracket, 73mm. Do I need a spacer? You know how it is. Between the brain fog and that old bike sitting around for a few years I can't remember if I need spacers.
Spacers on a 73mm bottom bracket?
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chrisx
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😆 I know how it is. Some days are more foggy than others. Yes, one 2.5mm spacer on the driveside.
Some bb have a wider side to them. Which should go drive side. I know because I just went Through this tonight.
Others are built to use a spacer.
IMO It’s better to have the wider bb as the bearing will be offset with it providing better crank stabilization.
Others are built to use a spacer.
IMO It’s better to have the wider bb as the bearing will be offset with it providing better crank stabilization.
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With a Shimano Deore XT 73mm BSA threaded bottom bracket it needs a 2.5mm spacer on the drive side.
off.road.cc
How many spacers should I install on my bottom bracket?
When installing a new or replacement threaded external bottom bracket onto your bike, it's important to get the right number of spacers on either side. Whether you're running a SRAM GXP, SRAM DUB, Shimano Hollowtech II or any similar design, read on to find out how many spacers you should run...
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What will happen if you forgot to put 2.5mm spacer on 73mm bb?
I recently finished a frame-up build and didn't install the spacer on my first go-round with the BB. This caused the chain to not clear the chainstay when in the smallest 2 cogs. Also if you're using the spindle sleeve that slips over the spindle between the 2 sides of the BB, it will crush/kink (from being too long) after the BB is tightened preventing the spindle from turning freely.
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