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Hello everyone, I'm very new to Tamiya and RC cars in general, so am looking for any advice. I've recently built my very first RC tamiya car (Monster Beetle) and what a beast it is! I just love how it can go on all types of terrain, especially on grass, without a hitch. Overall very happy with it! My grandad recently got one after seeing mine and choose the Grasshooper, however both him and I are very new to the RC car scene and didn't realise how much it struggles with grass. As that is the primarily terrain he will be driving on, I was trying to find ways of helping his grasshopper out. All I could think is he needs bigger wheels in general, so attempted to put my monster beetle wheels on his... the rear wheels managed to get on ok, but the fronts kept on scraping the 'arm' (not sure if correct terminology) and wouldn't spin around at all. So I'm just asking if he would need bigger wheels, what size of wheels he would need and/or something else? Thank you!