I see. What's WSMC? Is that like the local ninja 250 race series or something? Sounds like the 110/140 is a good compromise.^I just didn't like it. Someone else might like it. Some people like the fatter tire for the looks. At WSMC they run the 150 rear. I tried a 120/150 setup but was getting some slippage which could have been caused by a number of things. On the front I couldn't get even close to the edge. The larger tires add rotational mass as well. I switched to a 110/140 setup and found that's what I like the best. Personal Preference really.