I recently purchased a set of 675 series Ridler 15 inch wheels in 7 and 8 inch for my 1971 Buick Skylark. I put 235's on the front and 255's on the back. Some of the local car guys that have seen the car thought the back should have a wider tire. So without thinking (sound familiar) i purchased a pair of 295's. These are all Cooper Cobras. I mounted one of the 295's on one of the 8 inch wheels. It appears a bit too wide for the wheel, (side wall appears to roll out too much). Am I correct in this assumption and what back space should I have for a 295. Which of the wheel companies makes a 10 inch x 15 inch wheel that won't break the bank? I'll also need a matching pair of 7 or 8 inch. Thanks in advance for your help.