Re the dérailleur, make certain that your rear wheel is in straight before you go blaming anything else.
Sit it on the ground, undo the quick release clamp and make sure it's in as far as it goes both sides.
I had terrible trouble with inconsistent shifting one time and no adjustment was putting it right. Took me several days to work out this was the problem!
Sit it on the ground, undo the quick release clamp and make sure it's in as far as it goes both sides.
I had terrible trouble with inconsistent shifting one time and no adjustment was putting it right. Took me several days to work out this was the problem!