I have a pair of Kenda Super Moto Tires. They have only ever been used once and not sure how many miles were put on them, but they still have a lot of tread on them. They would last you for a while with how much life these tires still have. The front tires size is 90/90-21. The back tires size is 120/80-18. The price for the set is $90 not so firm will be willing to negotiate.