How can I determine what these tire specs mean? I am trying to build a space frame bike from the n55 project.  They have some pretty cryptic "designs".

What do these lines mean?


  FRONT WHEELS 24”x1.75 equipped with a reinforced axle (M12, 8.8) for
  one-sided attachment,


from their deign pdf here.

I'm actually going to be using this wheel for a trailer and the trike.

I googled a bit and could not figure it out.

I believe 24 inches is the diameter and 1.75 is the width in inches.

But what about the M12 and 8.8 parts?

The axle is reinforced for strength because it only mounts on one side.

Commented Link Picture



Eventually will be this:
Yes those are the tyre diameter and width in inches. M12 is a kind of metric thread, 12mm in diameter and 8.8 is a strength rating. I guess the axle is a piece of M12 threaded rod.