Can anyone explain why my front tyres are wearing out quicker than my rears. Is this bike set up, riding style etc. My current Michelin Power RS front and rear were changed at the same time. I have 2mm left on the front and 4mm left on the rear. I do 2k Miles approx on road and about 6 IAM skills days in the intermediate group a year. I?m not a competent rider but enjoy the skills days. But surely the rear should never out last the front.