Generally most Skyway Tuff Wheels use a 3/8" (10mm) axle with 26tpi on the front wheel, and 24tpi on the rear wheel.
I hope that helps ya!
-Ed
I also found this to be true.
So you need to get 24tpi 3/8" (10mm) pegs for the rear.
the rears as far as I know are ALWAYS 24tpi 3/8" but the fronts can vary, but most you will see are 26tpi.
and I think Suntour might have had 28tpi threads, and then made 26tpi coloured axle nuts...most confusing.