Hello all. I just got a set of excell SM rims with haan hubs loaded with rotors/bearings/sprocket/tires for $900. The rear is a 150/70/17 and it looks like it rubbed on previous owners chain.... What size tires do U guys run? Also, what about gearing? It came with 50t. I run 14/52 with the dirt tires and am hoping to not have to change the chain every time I swap rims. Thank You for any help.