Cavitation. Something you don't want in your shock absorber. It's devastating because basically it means the damping is lost. Small bubbles in the oil can never create the necessary damping forces. Traditional dampers working in extreme conditions sometimes suffer from low pressure on the piston backside.
The TTX was created by hlins engineers to eliminate the risk for cavitation. They succeeded. With the TTX technology a positive pressure balance is created in the shock which means the risk for cavitation is gone.
TTX stands for Twin Tube with the X illustrating how the flow through the valves in the cylinder head is designed. Thanks to the twin tube technology, the pressure usually created on top of the piston is transferred through the cylinder head and the adjusters for compression and rebound, then flows through the space between the inner and outer tube to the other side of the solid piston. This equals to a pressure balance within the shock. The outer reservoir is only used to take care of the oil displacement from the piston rod and heat expansion, which is why it can be fairly small in design. Inside the reservoir there is a dividing piston between the oil and the nitrogen gas. The gas pressurizes the oil to a level between six and nine bars, basically the static pressure on both sides of the solid piston.
36 mm shock piston.
Features high- and low-speed Compression and Rebound damping on shock reservoir; all settings are independent.
Piggyback-type shock reservoir gives improved cooling to the shock oil for more consistent damping and long damper life.
Allows a huge range of adjustments with equal increments of force throughout the adjustment settings range - even the shape of the damping curve can be changed to suit all types of tracks and conditions.
All preload and rebound adjustment changes affect the flow of damping oil from the piston, not the shock piston rod or oil displacement volume.
Compression damping forces are unique - unlike a conventional shock, compression is not caused by a drop in pressure on the rebound side of the piston; instead, it is caused by an increase in pressure on the compression side.
Reduces cavitation and makes high gas pressure in the shock reservoir unnecessary, keeping internal pressures in the shock unit at a minimum.
The low amount of internal pressure results in excellent suspension response even with a short stroke / high force acting on the shock.
TTX technology is also used with a lot of success in racing cartridge kits and front forks. As with a lot of new technology from hlins, the TTX technology was first introduced in racing after an intensive testing period and it instantly delivered a lot of wins and championships.
Just two years later it was available to any privateer and quickly adapted to street applications as well. After a lot of success in racing and the sport and hypersport segment, it has now also been made available for Adventure type bikes.
The TTX layout also makes these shocks ideal to use for electronically controlled (EC) suspension.
All aspects of basic shock setup and performance are thoroughly tested to ensure that each shock absorber performs flawlessly. hlins shock absorbers are supported by Factory Authorized Service Centers in the United States and are 100% rebuildable so you get lasting quality - you can readjust, reshim and overhaul the shock absorber for years of peak performance.