275/35/15 will never fit right on a 7 inch rim!! yes i did ok with the car i struggled for a long time with axels snapping and major tire wear. car was a fun car to drive and it always sounded great!! car is good for sprint races but not sure how it would do in an enduro? i wonder how it would do in prod trim? running slicks and wide rims to fit those 275/35 tires.if u want to do longer races i would think long and hard but if you just do sprint races fun car at 10 10ths !!!