Make sure your bikes have hook bead rims before buying tires. I had an '82 World Tourist and it would blow the tire off the rim with normal pressure.

Many of the suggested makes of tire say they are for hook bead rims only, right on the sidewall, but you only see that after you buy the tire.

Basically, if you deflate the tire and stick your finger between tire and rim, you should feel a ridge on the inside of the rim. Most aluminum rims are like that, most steel rims are not, as a very rough generalization.


27x1-3/8s have the same bead diameter as 27x1, 27x1-1/8, and 27x1-1/4 and are interchangeable.