24 x 1 3/8

[jamesdart]

looks like there's 3? Different sizes for a 24 x 1 3/8" tire. How do I determine which one is correct.
I picked up this Kmart all pro from the trash. I was going to take the stem, fork, and 3 speed hub for a muscle
Bike and return the rest to the trash but my mother inalw saw it today and she wants it.

 

[Bicycle808]

It's most likely a 540 but measure the Room hook to hook to be sure... Cool find, BTW