Climbing underneath, we reveal the Off Road Evolution four-link suspension using matching King 18-inch air shocks. A four-link-style suspension is beneficial to those of you wanting to go slow or fast. It provides a true fluid movement of travel with a hard-to-beat strength in design. The rear links are made of 2x0.50-inch wall DOM tube with 1-1/4-inch heims. Talk about strong. hidden under a skidplate is the Atlas II 4.1 transfer case.