How many spacers do I need for my bottom bracket?

How many spacers do I need for my bottom bracket?

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.

What do bottom bracket spacers do?

Bottom bracket spacers are used to adjust the spindle position to add extra clearance, or to fine tune chainline. For example, if your inner chainring is too close to the chainstay you can add spacers to move the crank outward just a bit.

Do I need to use bottom bracket spacers?

Some models do not need spacers. The 2.5mm spacer is not needed for a bottom bracket shell width of 92mm. Use the inner cover. For a bottom bracket shell width of 89.5mm, insert the 2.5mm spacer into the right hand side (between the frame and the right hand adapter).

Do I need spacers on GXP bottom bracket?

Each GXP bottom bracket comes with two spacers. For SRAM the following rule applies: 68mm bottom brackets need one spacer left and right, 73mm bottom brackets don’t need any spacers. After disassembly of the crank, the bottom bracket can be removed using the appropriate tool.

Do I need crank spacers?

For all cranksets with a constant diameter spindle (30mm, 29mm DUB and 24mm), spindle spacers are used as needed to remove any side-to-side play of the crank, and to center the crank in the frame. For most installations, the included spacers will be enough to properly position the cranks in the BB.

What is 68mm bottom bracket?

The 68mm and 73mm dimension measure the width of the bottom bracket on the frame of the bike with no BB installed, simply the width of the shell. Most road bikes that use a threaded bottom bracket measure 68mm wide and most cross country/trail mountain bikes measure 73mm.

What size spacers do I need for a 68mm shell?

You’ll need to use both the provided 2.5mm spacers for a 68mm shell, placing one on either side of the bottom bracket.

What size spacers do I need for my bottom bracket?

For 68mm and 83mm Shimano HTII bottom brackets 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. For 73mm Shimano HTII bottom brackets If your bottom bracket shell is 73mm wide, you only need one 2.5mm spacer fitted to the drive side.

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.

What are the spacers for 105 compact / double?

It’s a triple, and has spacers between the cups and the cranks on both sides I think. According to the Shimano exploded diagram, there’s no spacers for 105 compact / double, just O-rings presumably to form a seal with the tube. The equivalent diagram for my triple shows the chunky external spacers that I have.