I've read on here numerous times that rears typically wear about twice as fast as fronts. well for whatever reason I'm not always experiencing this... first couple sets seemed close, with the rear wearing slightly faster, but nowhere near twice. in fact when it's time to replace the rear there was little point in not replacing the front at the same time. bike's a r1200gs and it's often quite loaded down using the three vario cases fairly filled. basically curious why my wear on the front vs rear seems so different than what I read about.