Toyota J71 rear monotube
Pair of high-pressure rear monotube shock absorbers, entirely made in Italy, for Toyota GRJ71.
HM4X4 monotube shock absorbers are characterised by the following features:
- Ergal head machined from solid;
- professional grade silicone valve;
- T.I.G. welding where necessary for maximum resistance and refined aesthetics;
- internally ground mechanical steel tube, with an external diameter of 52mm and a thickness of 3mm to resist shocks and guarantee the absence of twisting;
- electrolytic zinc plating with iridescent white finish and subsequent trivalent chromium-based passivation with surface hardness 80 HV;
- steel rod diam.20mm coated 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;
- double bump stop in polyurethane and steel to stop the extension stroke in a controlled way and not weigh on the bindings;
- ROTHEN Fork oil with very high viscosity index (Viscosity DIN 51562 40°C:13) specifically designed for off-road use which guarantees regular calibration up to 200 °C which is essential for intense use such as races or raids in the desert;
- double adjustment of the rebound and compression calibration (double effect shock absorber), both at high and low speeds with translation reed valves;
- linear piston with reed valve and adjustable double bypass for maximum comfort at low speeds;
- high pressure pressurization with inert gas;
- calibration on test bench at 10 speeds, from 5 to 500 m/s to have the perfect calibration in all conditions.
The HM4X4 shock absorbers can be re-calibrated and revised in each of their components, the revision of the HM4X4 shock absorbers is guaranteed at a cost of 50 euros each for the entire life of the shock absorber.
In the first year after the purchase, the recalibration, upon request, is carried out free of charge.
