Hey All, Going to replace the stock Dunlop 's on my WR and have decided on the Michelin M12's. Problem is they don't come in the same size. The Dunlops are 80/100 21 Front and 110/100 18 rear. What is the closest Michelin size. Looks like the only Michelin front is 90/90 21 whats the difference? Rears come in 90/120, 80/120, 80/130, and 70/130. Nothing rubbing with the factories, want to keep it that way. Thanks in advance.