the amf has 26 x 1/8 tires. I used that size wheel successfully on my motor bike for a while. The drawback to that wheel is that you can only run 26 x 1 3/8 sized tires. The common mountain bike tires like 26x2, 26x1.75 and 26x2.3 have a smaller bead diameter and will not fit those 26x1 3/8 rims. I found that out the hard way. Broke a lot of tire levers in the process.