I have yet to see a quad float with SOMEONE ON IT! Hence the need for snorkels. And for those of us that do not have a snorkel set up best way to get the quad across deep water is to get off and float it across. The bigger the tires, the more air in those tires, the better it's going to float.

 

yes it will if you inflat tires a lot and also inflat a basket ball attached to the front and rear of the frame