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Discussion Starter #1 (Edited)
I am getting ready for the power tour and have a set of 17 x 7 with 4" bs and 17x8 also with 4" bs.T he tires are 245/45/17s front and rear. I would like a slightly taller tire on the rear. Should I go with a 255/50/17 on the rear?How about a 255/45/17? Need help quick! Need to get them right away . By the the way this is for a 67 RS.
 

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The backspace 4" is not ideal - 4.5" or 5" would be better. It's not going to be too much of a benefit to go from a 245/45-17 to a 255/45-17 tire. The 255/50 will help slightly but will it fit without rubbing? You need to measure how much additional clearence you have. At this point I would say stick with what you have. The small savings in fuel economy will not offset the cost of the tires.
 
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