Just coming up to 18k miles and 4 years old. The rear tyres are completely worn yet the fronts have a good 5mm on them, but are cracking. The van is a fully converted Revolution Ricos with 40mm lowered on springs with MOMO revenge 18s, 255/45/R18 103W Saferich tyres. Apart form the obvious answer that , "there must be more weight on the back", has anyone got any thoughts on why the heavy wear on the rears? Also, the passenger side are more work than the drivers side both front and rear. TIA.