Fit well (235/40r18). They are also quite easy to use and the design allows for very good tire size adjustment. Mine (235/40r18 again) are about 25" tall and smaller than they fit. A lot more tires fit in it. The Velcro adjustment allows a wide range of adjustments. like the fact that the base material is very thin nylon. I would pay more if they were canvas or something more durable. That being said, for my own purposes they are not "carried around" with me, they are just for storage to protect my ties and wheels from dirt or bumps during summer/winter storage when I change sets depending on the season. I also strongly recommend that if you have good wheels that you care about, that you also buy flat felt wheels of the same brand as the pile splitter so you don't scratch anything. Overall a decent product for the amount paid and I would buy it again