Originally Posted by
Barry2
What's wrong with the product I linked in post #8 ????
That states the diameter is 2.0 mm and groove width 1.0 mm, apparently SRAM uses 2.3 mm x 0.64 mm which is standardised in DIN 6799. Now, for a non-essential part that springs to fit, that might be near enough, but if you're bothering to fit it you probably want the right part.
Added: Actually it states 2 mm x 1 mm, no implied precision.