Originally Posted by
Ghrumpy
Yes, you need a different tool. That's not a cassette lock ring tool you're using, it's a freewheel removal tool. The spline pattern is similar, but different enough not to be compatible. Get the right tool and you'll be in business.
Dang, I need another tool???
Yeah they look the same but the diameters are slightly different. I wish they were all made the same...