Suspension system

The inclined tinkerer can make many improvements to the chassis of an RC vehicle and implement ideas. Typical is the replacement of the chassis components with parts made of higher-quality materials such as the elastic plastic RPM or solid aluminium.

RPM Plastic

Compared to conventional plastic (ABS), RPM is a softer and above all more elastic material. The great advantage of using RPM chassis parts is their long service life and improved break resistance. Such tuning parts are of course expensive to buy, but usually pay for themselves after a reasonable period of time. The wishbones of RC cars are very susceptible components that can be damaged quite quickly by collisions or jumps. Vehicles equipped with RPM plastic wishbones can be expected to last considerably longer. However, the significantly increased elasticity of the material also has disadvantages. For example, the driving dynamics and the relatively soft tuning parts suffer, the behaviour becomes less precise and the accuracy of the vehicle settings decreases. It has also been noticed in use that a complete replacement of the wishbones by RMP means that they permanently change the settings on the vehicle even while driving, e.g. after hard landings or collisions, so that improvements have to be made.


Comparing the solid milled tuning parts with the ABS parts supplied as standard by the manufacturer of the Dune Fighter, it can be seen that there are three main advantages of the aluminium wishbones and aluminium wishbone brackets:

  • maximum stability and durability
  • better mounting options
  • very precise driving characteristics

The first point is most likely self-explanatory, because metal parts milled from solid material are very difficult to destroy. The improved assembly properties are mainly due to considerably increased tightening torques of the screw connections. Compared to the plastic threads, hardly any of the threads of aluminium parts can be over-tightened. Among other things, this, but first and foremost of course the material itself, results in the excellent driving dynamics.

Although Alutuning has many advantages over the replacement of defective suspension parts by original parts, these parts often also take their toll, for example, inferior axles are now more at risk because plastic wishbones can absorb energy up to a certain point due to their elasticity and thus a fast bending of axles only occurs at higher loads.

Aluminium suspension struts additionally reinforce the handling and allow a hardness adjustment of the chassis by adjusting the spring preload. How the adjustment of the spring hardness and the adjustment of the compression and rebound stages of the dampers affect the driving behaviour can be read here. Aluminium milled shock towers are also useful for further stiffening, in contrast to those made of RPM. The latter do not exist because there is a rather low risk of breakage for shock towers and the suspension precision suffered. Here too, however, the vehicle benefits primarily from the tighter bolting and considerably improved rigidity thanks to aluminium shock towers.

The uncompromising completion of the aluminium chassis is achieved when the described parts are supplemented by aluminium wheel carriers on both the front and rear axle. All-aluminium chassis for maximum driving precision.

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