ISSA - International Slalom Skateboarding Association

I am thinking of buying some siesmics and need advice on width. My board is 33.5 inches long by 7.5 inches and i will probably use Grippins. I won't be racing ,only carving around town.
Tim

The 130's should be suitable on a 7½ wide board. If you don't want your wheels to stick out at all, you might have to go with the 110 though. The Grippin is centre-set, but it's still fairly wide.