The initial upgrades, airbox, exhaust baffle and carb rejet brought this bike to life. I ride fairly hard and fast as my trails are open but not at all smooth. I have performed a couple of adjustments to the rear shock but I dont think stock is going to cut it. Before I invest in new rear suspension, I would like to try to install a wider rear tire than the stock 100/100/18 in an attempt to increase overall traction. What is the maximum tire size that I can apply to the stock wheel without creating clearance issues?