Originally Posted by
TugaDude
If you are replacing a cassette, why not just use an 11 tooth ring off of a cassette along with a single speed conversion kit? I think Jenson sells the 11t cogs for around $3.99. Add the spacers from the conversion kit and you're all set.
A first position sprocket won’t slide all the way onto a freehub body. It has ‘stops’ and would need to have those precisely machined off in order to be useable.