A direct bolt on to your existing JCRACING SXR1500 Rear Sponsons. These are our original tried-and-true rear sponson blades. If you are a recreational rider, these blades are for you.
As for placement, we suggest starting at one or 2 holes forward from the rear then go from there. Some riders like it all the way back. That will make it turn a bit wider, but it will increase rear grip. Going further forward, the rear blade will act more like a mid sponson and it will turn tighter, changing the pivot point of the ski more towards the center of the boat. In both cases, you will need to adjust your body positioning to compensate and get the most from the move. All the way back, you will ride it with a longer handlepole (if you have an adjustable pole) and be hanging more off the back. As you move it forward, you will change your body positioning to ride it more over the bars. Try it and see what you think. 99% of this is personal preference which varies. That’s why we made them adjustable.