This is mine on my Redcat.Well there's gotta be a reason they are not available anymore. What works usually sticks around and what doesn't falls to the wayside
And not to mention the gearbox would have to be redesigned. With a stock setup the pinion and spur gear spin in opposite directions. With a belt drive they would spin the same direction, making your wheels spin in reverse
As long as they have the correct bore and tooth size they should be OK.I have seen 11mm wide gears on ebay used for 3d printers (in aluminum and stainless steel)
I wonder if a standard belt would hold up? The gears range $3.00 to $15.00 on eBay. Seems like a cheap and effective mod.