I have ran itps for the last couple years on road as much as off. I run gncc rears and mx6r fronts. Still have decent tread for all the seal coat riding and off etc. My replacement set is gbc xrex, now gbc xc master? Can't remember the new name, but same tire as maxis razor II's. Just as thick and great traction. Can get a full set off eBay for $275. The fronts are 21-?-10 and rears are 20-11-9, iirc. Good luck either way