Curious wheel question about my style 68's

I recently had a tire blow out on me on the road by hitting a pothole so needed to buy a new tire went with all four. The mechanic with me noticed that only 1 of y wheels are a 17x 8.5 and the 3 are 17 x 7.5 is that a problem? The tire that blew out was the 17 x 8.5...





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