Threaded Hub, Why has this happened?

Basically, I had a wheel, it was running fine. The sprocket and lockring were on tight.

Then, I got a new sprocket for the wheel and put it on a different bike. The wheel and lockring are the same, just the sprocket is different, it seems to be slightly wider than the old one.

After a few rides the pedals keep slipping and I tighten up the lockring, fixing it. Then just now it slips, I tighten the lockring and it just spins, the hub has been threaded. I don't see why this has happened.

Maybe if the new sprocket was thinner so the lockring didn't reach it I could understand, but its not, its wider.

This is the first time I have changed the lockring or sprocket on this wheel so its not like its old or anything..

Is it just because the hub is rubbish? Even on a shit hub I'd expect it to be able to be changed at least once.

Phil

if the new sprocket is wider, there may be less avaliable space to screw on a lockring. if this is the case, make sure the sprocket is on as tight as possible to free up some threads to screw a lockring on. the lockring is probably just not biting because the new sprocket is wider..

if the actual lockring thread has stripped, i would just tighten it up as tight as possible anyway (possibly using rotafixa method or hammer/screwdriver method), and then dont skid/backpedal for a few days, it should then be tight enough.