The organization of the series with a better defined location of each fork was also reviewed. Pike is now extending from 120 to 140 mm, Lyrik from 140 to 160 mm and Zeb from 160 to 190 mm. Gone are the days when 3 forks were available, for example in 150 mm, which could lead to serious dilemmas. RockShox has worked to simplify things, while still leaving some room for movement at the ends of the forks.
We go inside and on the side of the cartridge with another big piece of this release: Charger 3. Brand new, leaving the Charger 2.1 diaphragm and moving on to a much more classic floating piston. “The membrane had the advantage of having less friction,” explains Dimitri Grekoff, a RockShox specialist, “But in recent years, we have made so much progress on the spring and with the new guide rings that we can afford to return to IFP, which is becoming more efficient and reliable.”
With this new cartridge, RockShox pursued two goals: first, to reduce the “hardness” or “roughness” of the fork, especially seen on Zeb’s very rigid chassis, and to minimize interactions or interference between compressions at low speeds and that high speeds.
To this end, the brand envisioned an architecture where the oil first passes through a high-speed circuit (controlled by a needle valve), then arrives at a low-speed circuit, which is divided into two: an “easy” route and an “easy” difficult “route. The first consists of a passage in the piston rod through the lights and is adjustable thanks to another needle. The second is fixed and the oil is discharged into the holes of the piston itself, on which the valves, which require a small pressure to open, rest.
Dimitri Grekoff describes in detail the principle of operation: “Schematically, two needles regulate the flow of oils and the main piston will control the dissipation of energy. The slow compression will correspond to the low feed rate of the rod, ie the small volume of oil that will move slowly. This oil stream passes through a high speed needle, which will only be useful at higher flow rates. Valves that are too heavy to open at this low oil flow will be redirected to a low speed needle valve.
“The bigger the impact, the faster the rod moves, so the more oil it moves, the flow of the high-speed needle will be large enough to be able to regulate at this point before you push.” valves that dissipate the rest of the energy generated. “
By the way, whoever says new cartridge says new oil. As in 2019 with the Charger 2.1 cartridge and Maxima Plush oil, this new cartridge comes with new oil. Still developed by a Maxima specialist called Plush Dynamic, it aims to offer better performance in terms of both durability and temperature resistance, and with the new forks it works just as well as with the new RockShox shock absorbers.