Originally Posted by
Jipe
Thanks for doing the test.
The problem is actually the lockring !
As explained, Moulton used a similar thick to put a 10 teeth cog on a proprietary modified Campagnolo freewheel but could keep the standard Campagnolo lockring and the standard Campagnolo tool. Maybe because the smallest cog is bigger, 10 teeth vs. 9 teeth ?
A custom big washer between the Sunrace lockring and cassette could maybe do the job ?
Maybe. The problem is this extra washer would make the whole cassette assembly wider, and there is very little margin here before the lockring either doesn't have enough thread to screw on securely, or rubs against the dropout. Maybe, maybe not.
I guess, if you're considering this attempt, and you already have the kind of one-piece cassette you need, then you may as well try it. Best case, it works. Worst case, you replace the Sunrace hub with a normal one. Not an enormous expense.