21-02-2013, 02:35 PM
Ideally you want spacers a little wider, the challengers ate ET31 and the 306 is designed for ET18 but a little lower than that looks good so 15mm is fine.
Tyres with a lower aspect ratio will also help because although the tyres themselves wont actually be narrower you have less sidewall height and so less sidewall bulge under the air pressure and im guessing that your only just rubbing on the bottom collar.
Tyres with a lower aspect ratio will also help because although the tyres themselves wont actually be narrower you have less sidewall height and so less sidewall bulge under the air pressure and im guessing that your only just rubbing on the bottom collar.