The 512 Series rear shock from Progressive Suspension is a steel‑constructed, coilover twin‑tube unit finished in black. With an extended length of 15.90 in, it mounts directly to the rear of an ATV frame and incorporates an internal reservoir to protect the damping components. The shock’s single progressive‑rate spring is engineered to deliver a load range of 140 lb/in to 190 lb/in (2.50 kg/mm – 3.40 kg/mm), providing a smooth transition from soft initial travel to firmer support as the suspension compresses.
Damping is supplied by a gas‑charged system with fully adjustable rebound, allowing riders to fine‑tune rear‑wheel control for a variety of terrain conditions. The combination of a progressive spring curve and adjustable rebound makes the 512 Series shock a versatile choice for ATV applications that demand both comfort on rough surfaces and stability during aggressive riding.