I purchased two (2) sets of these covers, four (4) total, to protect my vehicles with 265/70R17 (31.6" diameter) tires. According to the manufacturer's description, I should have bought the ADCO 3952, which fits tires up to 32 inches. I played it safe and bought 3951s instead, which they say will fit 33-35 inch tires. I'm glad I did as they fit snug without being too tight or difficult to fit. The smaller size is likely to be difficult to install. The only thing I don't like about these cases is the elastic cord attachment system. I have a set of Camco trailer tire covers that use a quick release strap on the back of the cover. It's not that the bungee cord is bad, but threading it through the grommets is harder than snapping the buckle together.
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