Hey guys,
Just thought i'd see if anyone else has had any problems with the echo screw on 18T sprockets?
I put mine on, got bike sorted for what would have been this weekends London ride, all seemed fine. Went for a little ride to bed in the disc, make sure everything was working well, and it felt as though something in my drive train was slipping when i turned the cranks under a bit of power.
First thought was that my hub was skipping/ not engaging properly, but as i looked into it, with a bit of power i could turn the cranks without the sprocket moving.
Took it off the bike, thought it had stripped the thread off the crank, but when i got the sprocket off the threads were damaged, but nothing major enough to make this happen. I then measured up the thread on the sprocket against my old try-all freewheel, and the innner diameter is over 1mm wider than that of the try-all, so the cranks were turning inside those threads.
Busted out my dads engineering book from the loft, measured things, checked the tolerances, and according to those, it was a really sub-standard component.
Basically seeing if anyone else has had any issues with them, or if i've just got a dodgy one.
Matt