Special tires?

[BrianG]

Up to now, I've been pulling my little girl around in her wagon using my XT8 truggy. Now that she's getting heavier, there isn't enough traction to do this much longer. So, I thought I'd basically replace the front wheels/pull handle assembly with the front end of a truggy (with a little extra work to make it wide enough). This would give me steering and FWD power in one spot.

However, are there any 17mm hub tires that are not foam-filled and squishy? Her weight on the front would squash regular foam-filled tires down flat. Ideally, air filled tires would be the best, but properly sealing R/C tires would be a chore, if even possible.

I plan to use an outrunner on 5s using an extra MMPro I have lying around, geared for 8-10mph max. I was thinking of using a ERBE transmission assembly, which would give me the motor mount (need to mod for the outrunner) and the necessary gearing. I would rather use a transmission with all metal gears, but not sure what's out there, is reliable, relatively inexpensive, and readily available replacement parts.

So, if anyone has any tire or transmission ideas, let me know!