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The spring stiffness is the force that is required to compress a spring a certain distance. Softer springs mean that the suspension is much more sensitive and with harder springs the suspension becomes much firmer. It is necessary to adjust the spring stiffness to suit the rider’s weight, so that the suspension does not sink too far when the rider sits on the bike. The suspension must not bottom out.
All Canyon bikes which are fitted with steel springs have optimized spring stiffness (OptiTune). That means depending on the frame size we fit various types of suspension springs.
The pre-load allows the sag (negative travel) to be finely adjusted. If the pre-load is increased, the amount of travel is reduced.
The BoXXer fork allows the adjustment of pre-load via the black knob at the top of the left-hand stanchion.
On suspension forks the relevant knob to adjust the spring stiffness is often marked “Coil” or “Preload”.Picture 1
On shocks with steel springs you can alter the spring pre-load by turning the pre-load knob. Picture 2
Warning: Turn the steel spring a maximum of two turns. If this is not enough to adequately pre-load the springs, you’ll need to fit a spring with a different spring stiffness.
The majority of suspension parts use air. Instead of spring stiffness or pre-load being changed, one then simply alters the air pressure.
Spring elements can only function optimally when they are adjusted according to the rider’s weight. Forks and shock absorbers must sag somewhat under the weight of the rider so that there are sufficient reserves when a pot-hole appears on a trail - in this situation negative travel is required. On stones and roots on the other hand, the spring elements compress. Therefore, the negative travel (also called sag) should not be too great. Several of Canyon's spring elements work with air and can be quite easily adjusted to the weight of the individual rider (this also works with suspension forks). However, there are also models where a steel spring is used. In such cases it's worth taking a look at the details below, because a spring stiffness which deviates from standard can only be achieved by a replacement spring. Canyon will of course carry out this conversion for you.
Spring elements must not bottom out.