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SRAM 11 Speed MTB Cassettes: XD-Casettes vs. Shimano Casettes Gear Spacing?

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SRAM 11 Speed MTB Cassettes: XD-Casettes vs. Shimano Casettes Gear Spacing?

Old 02-13-20, 03:07 PM
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kmcrawford111
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SRAM 11 Speed MTB Cassettes: XD Cassettes vs. Shimano Cassettes Gear Spacing?

Hello everyone. I have two fat bike rear wheels with the same hub on each. One has a Shimano cassette body with a SRAM NX 11-42 cassette. The other has a SRAM XD cassette body with a GX 10-42 cassette. I like this because I have my “faster” setup on the 10-42, where the 10-tooth cog is useful, and I can swap wheels to my studded/winter/“slower” set without having to change the chain. But is the gear spacing the same between these two configurations, Where I won’t need to adjust the derailleur (SRAM NX)? Anyone know? Thank you.

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Old 02-13-20, 04:22 PM
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Oh, all you have provided is rear cassette cog counts. What about the rest of the setups? Is that top secret? Please, with provided information, any advise will be a shot in the dark
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Old 02-13-20, 06:04 PM
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I thought I provided all the relevant information, but here goes:

Crankset: Race Face Aeffect Cinch, 28T

Shifter: SRAM NX (may soon change to XX1)

Hubs: Stout XC Pro 197, thru axle
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Old 02-13-20, 06:06 PM
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Its one tooth, no issues.
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Old 02-13-20, 06:24 PM
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I know it’s one tooth. But is there a difference in the cog positions relative to the hub between cassette bodies?
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Old 02-13-20, 07:10 PM
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You can have two completely identical wheels swapped and still need a derailleur adjustment. Will it probably work 99% perfect? Yeah, probably.

Don't just assume they will though. All it takes to adjust is a 1/4 turn of some limit screws.

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Old 02-14-20, 02:42 AM
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It’s fine.

If you pick your chain length so it’s just got tension in top gear at top of travel, then it will work with 46t cassettes too. (Not the large-large method at full sag, that’s for front derailleurs)
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Old 02-14-20, 10:39 AM
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Thanks. I’m pretty happy with the 42T largest cog. I was actually on 11-34 until recently, when I started doing actual mountain biking and learned the value of the 42T!

I wish someone made a 12-speed 11-42 or 10-42 cassette. That would be sweet.
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Old 02-17-20, 01:33 AM
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The exact positioning of the cassette may vary slightly between wheels but the odds are high that it will work. You can theoretically use very thin shims to push one cassette slightly outboard to match the other. Really though the difference (if any) can nearly always be accommodated by a slight barrel adjuster tweak.

Shimano makes a 10-45 12 speed cassette for microspline freehubs for what it's worth, for those who want relatively close jumps.
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