i have no use for one the highest amount of water i have been in is like 3 feet. the only bike i have ever had probs with is my bigbear. every year the rad i ride on which is a smooth dirt road a few spots of it flood like 3 feet high and i love it i go flying threw it like full throttle and i get soaked! then one time my bigbear started getting all wierd but it pulled outta it....it like got a ton of water in it i think lol