| Hello MARTIN H
Just thought, as to why the chain got so slack so quick.
Not sure what bike you have, but if the two pinch bolts at the back of the swing arm,
have worked loose, maybe it's possible the concentric hub has moved.
As this is what you would use to adjust the chain tenshion.
Fordie's right though maybe a new chain is in order.
regards
TopiToo |