Bought these in "Large” for 27-29 inch tires. They went right over my 205/75/14 tires perfectly, as you can see. They seem to be secure without the straps, which is great, because I could only get the front tire covers strapped. So if you have a tandem trailer be prepared for that.Time will tell how they hold up to the North Carolina weather. Lots of wind, some heavy rain, and fluctuating temps will test these so I’ll update if necessary.