touching

hi guys can someone please advise me what to check .cos the markers on the swing arm are both set on the same marker. but i am unsure which to adjust next or which is the best way to set it right and by how much should the chain miss the tyre by my tyre is a 190 /50/17

has anyone else had this problem? just had new tyres fitted to my wheels, changed from a 180 to a 190 and when i've put the wheels back on, the chain is just slightly touching the side of the tyre:eek: what the ****? please some one tell me it's an easy fix without going back to a 180, lol.

Hi all just been in the garage fetling and noticed the left front brake rubbing on closer inspection the caliper looks like it is touching the disc any ideas as how that could happen I have turned the wheel around , still the same loosened the clamp bolts on left hand side bounced it up and...