Further to my previous posts about ZZR and ZZS, after two sets of the S for normal road use I have now returned to CR500. I thought it would be useful to compare weights ZZR 185/55x13 7.35kg, ZZS 185/55x13 7.65kg, CR500 175/55x13 6.5kg ZZR 215/55x13 8.6kg, ZZS 215/55x13 8.80kg, CR500 205/55x13 7.25kg Cheers