Yup long arm, short arm. 3 link, 4 link, armor weight, speed. Where I run in California a lot of the long arm guys get hung up in the rocks due to the lower control arm pivots being closer to the middle of the jeep. Also rocks catch the arms and unload tires. But the guys on regular trails and desert stuff love the long arm ride. I still am running my RK 3.5 with King's and speed bumps. Mostly rocks. Works for my trails we run.