EZGO and Club Car golf carts are a lot like a truck when it comes to suspension. You have shocks that soften your ride and leaf springs that increase the capacity of your load-carrying ability. The more leaves you have on a given spring, the more rigid it will be, giving it the ability to support more weight and pull heavier loads. That's right, even if you are just pulling a trailer, that is a strain on your suspension, and it might be time to replace it. An excellent way to tell is if the Rear Leaf Spring itself looks like it is sitting flat. The more curvature, the better.This is the standard three-leaf rear spring that came OEM on the cart. The aftermarket golf cart replacement is just as stiff, if not stiffer, than the factory it replaces. You need two of these if you are going to do the whole cart. Don't order just one and end up short parts, but the helpful salespeople at Buggies Unlimited won't let you forget something like that.