2

I'm trying to replace a cassette. I got a chainwhip tool set + two lockring tools. I assumed it would be compatible as it's a 'common' 8 speed cassette from sram.

However after trying this yesterday, the lockring seems a tiny bit too small (though all the grooves seem to line up. But it won't budge with the nut going through the lockring. I even tried to gently hammer it in, but that just left a 'hexagonal' marking on the lockring...

Potentially I need to remove the nut? However there is very little contact area (a few mm) that could occur between a spanner and the nut, unless perhaps it'll come off with very little force (I could give this a try tomorrow).

I did find this thread that seems to mention a similar problem: Is this an unsuitable cassette lockring tool?

However it's not clear in that question on how to determine one from the other?

My main question here is:

  1. What lockring tool do I need?
  2. Do I need to remove the nut?

Actually, this is starting to make sense. In the question I linked, it seems likely that they had a freewheel, and their lockring tool was too BIG. In my case I have the opposite problem, but it seems I have an actual cassette rather than a freewheel. In which case my lockring tool seems to be for a freewheel rather than a cassette..

enter image description here enter image description here

6
  • Does your tool have a code or anything on it ? – Criggie Dec 13 '20 at 23:16
  • 1
    Can you say more about the lockring tools you got? I think that SRAM cassettes that fit on a Hyperglide freehub use the Shimano lockring tool. You don't normally need to remove the nut to take off the cassette. – Weiwen Ng Dec 13 '20 at 23:18
  • The lockring tool has no code, it seems to be a fairly generic set off ebay. The other one in the set is a lot larger - so that one can be excluded. – Chris Stryczynski Dec 13 '20 at 23:30
  • 2
    Your tool is most likely a rip-off fake, since it's from ebay, looks like the thing but isn't.... You need either a SRAM or a Shimano tool, which are identical. – Carel Dec 14 '20 at 8:13
  • @Carel Cheap Asian freewheel and cassette tools work just fine for me. Calling it rip-off or fake is out of place unless the design is patented or the seller claims that it comes from a brand it does not. And that is normally not the case. – Vladimir F Dec 14 '20 at 13:16
2

You're right - you shouldn't need to remove the nut to change the cassette. That would throw the bearings off and would make a small job into a large job.

However this might be a matter of tolerances with the nut being slightly too big, or it may be that your tool is not a cassette lockring and is for a freewheel instead.

I have a couple of different cassette lockring tools and sometimes one fits when another one doesn't.

1
  • 1
    Just tried the new lockring that arrived and it fit's perfectly, so yes definitely seems like the first was a 'freewheel' lockring. – Chris Stryczynski Dec 20 '20 at 11:20
8

The tool you have looks to be for freewheels. Here’s a photo of a known good cassette tool (Park Tool FR-5.2): enter image description here

See how the splines are way deeper than your tool’s?

The other large tool you have is likely a bottom bracket tool and is not for cassettes at all.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.