This 13.5 inch Fast Tail is the best all around tail on the market. It has 30mm bolt spacing and is bottom mount. If you are having trouble with stall speed or pumping, this is the best tail. Just bolt it up and watch your game improve. Takuma riders are getting double and triple the pumping distance by switching to this tail. Don’t take our word for it. Change out the tail on your hydrofoil for this one and score!