My bike has a 180 rear on it too....came like that when I got it...have no idea ifI'm running an F2 or F3 rear wheel but I hope mine doesnt pop off....havent had any troubles with it now for 2 months...but you can tell its too big....it comes over so far on the clutch side, it nearly touches the chain

 

Apparently not, your rear tire is proof.

 

few weeks now and no problems...