[Joe Johnson]

Originally Posted by pujan824

http://www.princessauto.com/en/detai...el/A-p8005916e

We have custom hubs made. I will upload a picture later today

I am not sure I understand the history here because I don't see how you had popping tubes with this tire but I guess I don't need to.

Here's what I think you might want to do: Take advantage of the fact that not all 8" wheels are actually 8" in diameter to give yourself some rock and also to replace one of the sets of wheels in contact with the carpet with something less grippy.

Path 1:

Buy tires like this one from AndyMark or this one from VexPro and replace the center tires. If these tires are a little bigger in diameter than the Princess Auto tires, then hopefully it will give you enough rock.

Path 2:

Buy Omni Wheels like this one from AM or this one for Vex. Replace the middle wheels if the diameter is a little bigger than the Princess Auto Tires, replace either the front or the back if they are smaller. As to front or back, experiment a little, it depends on where your CG is located and how you climb. You are trying to get only two adjacent Princess Auto Tires to touch the floor at the same time.

Good luck.

Dr. Joe J.