You can only go with your motor and controller so far before you are in the woods with your differential. There are only so many RPMs that things will allow for, and then you are topped out. For those who want to unlock the top end, a Club Car DS Electric High-Speed Gear Set is the way to go. This will move you into a range that is more suited for speed and less for torque. So as long as you aren't trying to lead a double life with this golf cart, get ready to hold on because 25 miles per hour is not unheard of with this kit.We would highly recommend that this only be used on buggies that mainly see the pavement and maybe some light trails. If you are an off-roader, you want to be headed in the other direction for torque. This golf cart high-speed gear kit is all about acceleration. You are looking at a massive upgrade at eight to one compared to the stock twelve to one ratio. Call Buggies Unlimited and get a set ordered today.