The 550 and X2 versions mount to the outside of the bond flange, whereas all others mount to the inside of the bond flange.
DETAILS: Do you want your ski turning like it’s on rails? Introducing the first of its kind to production, purpose-built mid sponsons by JCRACING. This performance watercraft product is the best handling improvement you will make to your SXR 800/1100, SXR1500, SuperJet, or aftermarket hull. They even work amazing on the X2, 550, 650, 750 and any other standup ski. These mid sponsons prevent the rear from breaking loose in turns. The rider will notice immediately how much better the entry and exit of the turn is due to the increased stability and predictability. They will keep you hooked up around the course and provide improved straight-line stability. Unlike other blade sponsons, these don’t create any lift in the rear of the ski, and add rail grip throughout the entire turn.