do 13x6 wheels make a diference? i am a Poor($)racer and have been pricing new and used wheels.They will make a decent dent in my budget.so i am wondering the advantage over 13x5.5 wheels.i run a rabbit in ITC, and i see some guys run them and some don,t.besides the obvious wider tire=more grip i am worried about motor bogging as well . can the vw vets help?