I have a lockring tool can't remember who makes it not park I am pretty sure. It has a long handle and you can easily set it in the center of the cassette and then removed the 10 sp hyperglide cassettes. This thing actually slips around after you get the lockring tight. It will get it tight enough I am sure it does take some torque but not gorilla strength, but then the tool will slip in the lockring. ANyone have one of these and have this issue. I am think about simply getting a cheaper lokring tool from park and then use the wrench, this seems a bit under built in diameter.

There are a number of those tools that look very similar bet are in fact different sizes. The chances are much higher that you`re using the wrong tool than that the tool is defective.

Suggest you take the part (and your tool) down to your local bike shop and get a definative opinion. In cyberspace - its mostly speculation.

Does the tool actually slip in the splines of the lockring or are you feeling the lockring "ratchet" as it tightens down. Shimano lockrings and first position cogs have mating "teeth" that slip over each other as you tighten the lockring and may feel like they are slipping.

One test is to see if the tool will loosen a tight lockring. If it will, it probably fits ok.

Thanks you could be correct will try this, also the brand name of the tool is pyramid. I have a cassette on a wheel now I can see if it will remove the lock ring.

Check the splines of the tool and the teeth of the lockring for really bad damage. If there is no bad chewing up of the splines or teeth in the ring's center then it's just the serrations skipping over top of each other than you're feeling. The fact that you can easily remove the lockring suggests that it's just the serrations making that terrible bone chilling noise that happens when tightening the ring down.

Pyramid lockring tool, eh?

Maybe just a bad tool. I have found that it is sometimes wise to spend the money on reliable brands. Especially for often-use tools.

It's also possible that the tool is bottoming out against the hub/axle hardware. No amount of tool will fix that, except for running a QR to retain said tool.

Dummy me it works fine it was just sensation of the rings as another poster mention. I removed my old one and it came right off.