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SRAM 11-26 SRAM 9speed doesn't fit on my Ultegra hub

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SRAM 11-26 SRAM 9speed doesn't fit on my Ultegra hub

Old 06-08-07, 07:06 AM
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SRAM 11-26 SRAM 9speed doesn't fit on my Ultegra hub

Seems like I would have known about this --did I miss the memo? I was upgrading some drive train stuff on my light tourer and decided to replace the rear cluster with a new SRAM 11-26 9spd (replacing Shimano HG 12-23 9spd) for some more range. But I discovered it won't fit. It protrudes out to where the lockring won't engage the threads (and it obviously protrudes beyond the axle bolt). This leaves me wondering exactly what hub this will fit onto. Hmmm.
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Old 06-08-07, 07:25 AM
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Did the SRAM cassette come with a lockring and did you use it? Cassettes that start with an 11T cog require a specific (smaller outer diameter) lock ring.

Is there anything obstructing ithe new cassette so it won't seat all the way on the freehub body?

Try comparing the two cassettes to see if their overall widths are the same.
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Old 06-08-07, 07:56 AM
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+1 on the 11t lockring
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Old 06-08-07, 08:06 AM
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Originally Posted by vpiuva
+1 on the 11t lockring
+2, that's got to be it. I've got a couple of nine speed SRAM 970 cassettes installed on Shimano freehubs. Both have 11t cogs and special lockrings that came with the cassettes, they're perfectly compatible with the Shimano hubs-
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Old 06-08-07, 08:18 AM
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Originally Posted by well biked
+2, that's got to be it. I've got a couple of nine speed SRAM 970 cassettes installed on Shimano freehubs. Both have 11t cogs and special lockrings that came with the cassettes, they're perfectly compatible with the Shimano hubs-
Still a mystery to me. I used the supplied lockring and it could not engage. It clearly protrudes too much since it doesn't quite clear the axle bolt. I looked for obstructions at the back and found nothing obvious.

I'll put on the reading glasses and inspect everything closely tonight, but I looked at it pretty closely already before returning to the Shimano 12-23 which fit again just fine.
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Old 06-08-07, 08:56 AM
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Please let us know if you fix this because I am planning on doing the same on my bike.
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Old 06-08-07, 09:20 AM
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For kicks, SRAM cassettes fit XT hub bodies.
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Old 06-08-07, 09:28 AM
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Are you sure there isn't a spacer left on the hub from your old cluster?

Once these get torqued down a few time they kinda smoosh into the hub and can look like part of it.

Just a thought.
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Old 06-08-07, 10:14 AM
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You might want to check the cassette as well--perhaps there is an extra or mismatched spacer somewhere in the mix?? I've used both SRAM and Shimano cassettes on the same hub before with no problems at all.

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Old 06-08-07, 02:58 PM
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It does fit. I inspected everything closely, pushed it onto the hub a little harder and it still looked a little protrusive and I still couldn't quite get the SRAM lockring to bite into the threads. So I tried the Shimano lockring. It did engage the threads and I was able to tighten it down pretty well. I suspect there was some burr factor on the new cassette that I may have forced on through with the Shimano lockring, because after removing the Shimano I was able to engage the SRAM lockring as well.
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Old 06-08-07, 03:05 PM
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From Sheldon-
11 tooth sprockets
Cassettes that feature an 11 tooth sprocket are intended to fit "C" (Compact) hub bodies only. The spline grooves in the 11 do not run all the way through (it wouldn't be strong enough if they did.) These cassettes can be fitted onto older bodies two ways:
  • If you install a 1 mm spacer before the cassette, the cassette will fit, but the cassette will then be 1 mm farther to the right than it is intended to be. With most bikes, this won't be a problem, but if your frame has very tight clearance, or if you want to be able to interchange multiple rear wheels without having to re-adjust the derailer, this could be a problem.
  • You can convert an older Freehub body to work with "C" type cassettes by grinding off the outer corners of the splines so that the 11 can fit on far enough to hold the rest of the cassette in place.
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Old 06-08-07, 03:20 PM
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I did read that. I'm hoping that mine is so tight that I've barely reached (approached) the limit where the 11 tooth sprocket slots stop. It may "wear" down to where the rest of the sprockets loosen up. Then I may have to modify the 11.
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Old 06-08-07, 04:45 PM
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Yeah, I didn't mention the "C" bodies since I assumed (maybe incorrectly) that Shimano freehub bodies that accepted 11T cogs were pretty much universal by now. If the hub is old enough not to have a C-body, that could be the problem
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Old 06-08-07, 05:09 PM
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It is working just fine for now.
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