Toyota GRJ 71 front shock absorbers
Kit consisting of two front shock absorbers, pivot/pivot mount, for Toyota GRJ 71, with 60 mm reinforced body, 20 mm oversized stem, pressurized twin-tube type, serviceable and recalibratable according to your needs.
The shock absorber, entirely Made in Italy, is built with internally lapped steel tubes for mechanical use and entirely galvanized to avoid corrosion.
The bushings are made of 80 shore thermoplastic polyurethane specific for automotive use, resistant to grease, oil and fuel, much more resistant to deformation and wear than the rubber ones on the market.
All components are sintered for maximum calibration control and the seals are in graphite Teflon to improve smoothness and silence.
The shock absorbers are calibrated in compression like the originals to promote comfort, but more braked in rebound to reduce the hopping of the vehicle. This calibration is designed to best adapt to the Italian off-road vehicle and is compatible with any type of set-up; in any case, the desired one can be chosen at the time of order at no extra cost.
The shock absorber can be recalibrated and overhauled in all its parts and in the first year after purchase the recalibration is carried out free of charge according to your needs.
Inside the shock absorber there is a first internal bump stop in extension resistant up to 5000 kg and a second polyurethane bump stop that slows down the last 10 mm of stroke to avoid excessive stress on the frame supports; these limit switches can be used as a travel limit for the axle.
ROTHEN oil with a high viscosity index is used which guarantees the maintenance of the calibration up to 200 °C, therefore these shock absorbers are also suitable for heavy use and raids in the desert.
The Competition60 shock absorber has the following characteristics:
- T.I.G. welding for maximum resistance and refined aesthetics;
- double tube in internally lapped mechanical steel, entirely galvanized with electrolytic zinc plating with Iridescent White finish and subsequent trivalent chromium-based passivation with surface hardness 80 HV, the outer tube has a diameter of 60 mm and a thickness of 3 mm to resist shocks, should the body be dented, the shock absorber will continue to function normally;
- Ø20 mm steel rod covered in CrVI-free hard chrome with tolerance according to EN ISO 286-2;
- polyurethane bushings highly resistant to deformation and wear, they are molded with 80 shore thermoplastic polyurethane specific for automotive use, resistant to grease, oil and fuel;
- sintered internal components for maximum wear-free calibration control;
- sealing band in graphited Teflon to improve the smoothness of the suspension, compared to the cast iron bands they are much quieter;
- double limit switch in polyurethane and steel to stop the extension stroke in a controlled way and not weigh on the attachments to the frame and axles;
- ROTHEN shock absorber oil specifically designed for off-road use with a high viscosity index which guarantees regular calibration up to 200 °C, essential for intense use such as races or raids in the desert;
- double adjustment of the rebound and compression settings, both at high and low speeds with translation reed valves preloaded with star springs in compression and coil spring in rebound;
- double seal with o-ring and oil seal with metal base, the high quality of the closure allows not to use the fork protectors which in the long run create dirt accumulation and damage the shock absorber, any debris that settles on the rod is cleaned by the double lip of the metal oil seal;
- calibration on test bench at 10 speeds, from 5 to 500 m/s to have the perfect calibration in all conditions.
The overhaul of the HM4X4 shock absorber is guaranteed at a cost of 50.00 euros each.
AIR DRYED pressurization is an innovative two-stage pressurization technique. It allows to pressurize the shock absorber with inert gas, after having created a high vacuum, completely extracting air and humidity from its interior. This allows to minimize the phenomena of oil emulsion and the creation of rust that humidity inevitably creates inside a non-pressurized shock absorber. In addition to making the shock absorber more performing, the Air Dryed pressurization considerably extends the duration of the shock absorber over time and guarantees constant calibration even after years of use.
