Where can I find rubber tires to replace the plastic ones on my sons John Deer Peg Prego Tractor

HI, be careful making the tires too "grippy". the gearboxes will strip easily if the wheels dont spin freely at least some while getting moving,

I was wondering the same thing, can't find any rubber replacements and came up with a solution- use a rubberized undercoating for automobiles. It sprays on thick and provides more grip than the plastic wheels do.

There is more info on modifications here:

http://kidsbatteryrideontoys.com/gearheads-only/

Copy and paste and should have the info you need-

http://www.kidswheels.com/index.php?option=com_content&task=view&id=5&Itemid=33