Are bottom bracket spacers necessary?

If you need to use a bottom bracket mounted chain guide or derailleur, then you’ll also need to remove the innermost 2.5mm spacer on the drive side – so a 68mm or 83mm shell will have one drive side spacer and one non-drive side spacer, while a 73mm shell will need no spacers at all.

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Do I need spacers on my crankset?

Not every BB/crankset combination will need spacers. A few cranksets may include stock spacers and/or an adjuster that are too wide when used with Wheels Mfg bottom brackets. If these spacers and/or adjuster cause the bearings to bind, you will need to replace them with a selection of thinner spindle spacers.

Do dub bottom brackets come with spacers?

Both have the same bb, just different spacers. Normal one come with a 3mm, to be used with normal Dub crank. Wide one come with 2.5mm and 5.5mm spacers, to match with wide Dub crank. “One Color 68/73” is for standard Dub crank (come with 3mm spacer.)

Can I use a Shimano crankset with SRAM bottom bracket?

SRAM DUB bottom brackets aren’t compatible with Shimano cranks either. DUB bottom brackets are designed for a 28.9mm spindle. And since Shimano cranks rely on a 24mm spindle, a combination of the two results in a non-secure fit.

How many spacers do I need for my bottom bracket?

The shell width determines how many spacers you need on each side, but it also depends on which brand you’re using. A 68mm or 83mm bottom bracket shell needs two of the 2.5mm spacers on the drive (chainring) side and one 2.5mm spacer on the non-drive side.

Why are MTB bottom brackets so important?

The best MTB bottom brackets enable your cranks to spin on a secure and balanced bearing interface. As with any rotational component on a mountain bike (chainrings, hubs, cassettes), the bottom bracket works hard for a living and can be exposed to trail contaminants as well as high load forces from heavy landings.

What size bottom bracket do I need for my bike?

What size spacer do I need for my Super Boost?

If you’re running a chain device with your Super Boost setup then you’ll need a 2.5mm spacer on the right-hand side of the bottom bracket and a 4.5mm spacer on left-hand side of the crank axle and a 6.5mm spacer on the right. Once again, DUB 68mm is just like GXP, with a 2.5mm spacer needed on either side of the bottom bracket shell.