Belt drive on dune runner?

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I just ordered up some aluminum pulleys. I ordered 12t, 15t, 22t, and 24t. They have a 6mm bore that'll increase to 8mm. I didn't order a tensioner b/c I need to figure that one out when things are coming together. I also ordered some belts from 9.8"-12.2" in circumference. I made some measurements; I hope my math is somewhat close. The belts are 15mm wide w/ a 5mm pitch and a breaking force of over 900 lbf/in (to be honest I have no idea if that's strong enough). This should be a learning experience.

I don't plan on getting this done real soon but I wanted to make some progress.
 
Hostile slicks are awesome.

You could run the 5b rears or if you needed a taller final ratio you could run the 5t rear.

These are 5b rears on the back

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