My son's CX bike has a 10 speed Shimano cassette on it, on an 11-speed (road) freehub body. I've recently had cause to swap to a SRAM cassette (1050) but it seems that the cassette is fractionally wider and, when used with the same 1.8mm spacer, pushes the smallest sprocket past the edge of the freehub.
Without any spacer at all, the cassette is fractionally loose, but with a bit of chopping and changing, a 1mm spacer seems to do the trick and it has gone together nicely.
Is this normal? Do SRAM 10 speed cassettes need fractionally smaller spacers on an 11-speed freehub, or is this just one of those areas where you need to try a range of different size spacers until you find one that fits?
The shimano 10speed cassette should have a 1.85mm spacer and a 1.0 mm spacer together to make it work.
The sram cassette only needs the 1.85mm spacer. Have you left the 1mm spacer on the hub and not noticed?
Nope, the Shimano cassette definitely only had a single 1.8mm spacer and, with just this spacer, the SRAM cassette was too wide on the freehub body - the smallest sprocket had almost no splines to lock onto.The shimano 10speed cassette should have a 1.85mm spacer and a 1.0 mm spacer together to make it work.The sram cassette only needs the 1.85mm spacer. Have you left the 1mm spacer on the hub and not noticed?
If this was actually a 10-speed (rather than 11-speed) freehub, should it need any spacers at all?
Sounds like it’s not an 11 speed hub then. SRAM 10 speed cassette wouldn’t need a spacer then.
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Hmm, but that doesn't make sense. For it to be a 10 speed hub, it wouldn't need any spacer at all for either Shimano or SRAM, but the cassette is loose without one.Sounds like it’s not an 11 speed hub then. SRAM 10 speed cassette wouldn’t need a spacer then.
Hmm, well it does seem that in general, Shimano 10 is slightly less wide than SRAM 10, which therefore needs a narrower washer. Ho hum, it does at least explain it, even though the exact combination of washers isn't listed.
Thanks for the info.