4×4 Shock Absorbers used in smooth onroad conditions are judged upon their ability to provide a smooth controlled ride and handling, this means they must accommodate a stiffer valve performance to counter-act body roll and dive etc. An Ironman Shock absorber has been carefully designed to create the correct balance between firmness and comfort.

4×4 Shock Absorbers used in offroad applications generate enormous amounts of heat. Essentially, a shock absorber converts the energy of the spring movement into heat, it is vital to keep the shock absorber as cool as possible for maximum efficiency. Too much heat will cause “Shock Fade” and a poor vehicle ride and handling.

Ironman offers two distinct Shock Absorber concepts to cater for the needs of today’s 4×4 vehicles. 35mm piston, Nitro Gas Shock Absorbers are ideal for the general purpose user, with excellent performance in all terrain, from smooth tarmac surface through to the most demanding corrugations or rocks. Best for the all-rounder who mainly drives onroad, and the occasional adventure weekend and trip away.

41mm piston Foam Cell Shock Absorbers are constructed similar to the Nitro Gas, with the exception being their increase in piston size and the use of the cellular foam sleeve inside. The compact foam cell sleeve replaces the gas charge. The foam sleeve occupies less space inside the shock absorber than the gas charge, allowing more oil inside the shock absorber. The oil is the cooling agent required to expel the heat out of the shock absorber via the outer casing. More oil and the larger outer surface area results in a more efficient radiation of heat. The Foam Cell Shock Absorbers are perfect for use in very demanding and hot offroad environments. Foam Cell shock absorbers also operate very well in smooth onroad applications and will provide a marginally softer and supple ride.