HD Alloy: Fournales are high pressure air shocks which do not have springs like coilover shocks. The HD Alloy range have high pressure air filled dampers. These have a black cover and black sliding tube with anodised ally rings. These are lighter than the steel versions have the air valve for adjusting the internal pressure hidden and accessable by unscrewing the drop down top cover. Adjusting the internal air pressure allows for changing the effective "spring strength" easily. These come with a 2 year warranty.
