How big of wheels are too big? You may or may not know what a donk is. It is basically a car or truck with huge wheels on it but doesn't tuck into the fenders. In this blog, I am not talking about this type of car or truck. I am talking about trucks that actually tuck these wheels. So with that out of the way, is it ok to just keep going and try to tuck 34, 36, 38-inch wheels?