I'm not 100% sure if a tire from a Tamiya Grasshopper, Hornet or frog will fit the stock Golden Arrow rim but you can get a set for wheels and tires from those buggies and they will bolt right up to the Arrow. Tamiya and Radio Shack Golden Arrow uses the same wheel adapters and axle size so the bolt up is the same. I'm thinking that the rims from each buggy are the same size though (1.9" maybe) so if you find tires that will fit the only hard part is going to be removing the old tire from the stock Golden Arrows rims.