TimXLB, I'm running my 415msx on carpet with foams and I've found when you just space the wheels out to make the foam tires fit, the car is wider than 190mm. Have you measured the front of your car??? What I did to make the front end work (...with all Tamiya parts) was to run "A" blocks in the front with the short LWT reversible arms (only in the front) with the 6mm hex and 1 red and 1 blue spacer on the axle. This puts the front end just under 190mm and you don't have to cut the tire/rim any. You also don't have to put any other companies parts on your car...i.e...HPI.