i put a 700c wheel on the front.. was surprised by how much different it felt.. i liked the handling but not the fact i didn't feel like i could handle any obstacle. i have a 27" wheel with a fatter tire i might try for fun, but i think i need to get a better 26" front tire.. the back one is fine since it doesnt need to be as good anyways. i have a brake i could use with the 700c wheel but i think ill just get a better 26 tire eventually. right now i have 3 bikes in my size and one im trying to sell so i have plenty of bikes to mess with lol