I agree with Chi. Get good tires. My ATB came with Kenda Koyote (cheap) knobbies. The second ride I hit a piece of glass 2 miles from home and blew out the rear tire. A total loss. I've been on Armadillos ever since and have had zero flats in six months and 600 miles on the ATB. Zero flats in 9 months and 2500 miles on the road bike.