The manual for my Sram PG-1231 says I need a 1.85mm spacer as I am using an 11s freehub body. However, when I install it with the spacer the smallest chainring won't engage with the splines. Am I missing something here?

Ran it without the spacer previously, but after encountering some scraping sounds when switching from Shimano to Sram I figured out a spacer was needed according to the manual. I have now bought a new freehub body and installed it as the old one seemed worn out from my (supposedly) incorrect installation.

Manual says I need a spacer, but smallest chainring won't fit
byu/JonasManfred inbikewrench



by JonasManfred

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7 Comments

  1. walton_jonez on

    I think you got that mixed up. You need the spacer when you run an xd cassette in an xdr hub.

  2. This is an XDR cassette and if you have a XDR driver you’re golden. Don’t use the shim.

    If you’re using an XD cassette on an XDR driver, you need the shim.

    If you trying to use an XDR cassette with an XD driver…it won’t work without a machine shop to grind off 1.85 MM of the cassette.

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