Sirris R46 Shock Spring 220 mm Travel see the service section here

see the service section here for detailed instructions

4 kg per leg (driven by sturdy construction required for the forces and speeds encountered when pushing these bikes to their limits without compromising performance)

Forged 6061 aluminum

For example

Sirris R46 Shock Spring 220 mm Travel see the service section hereShock springs for Sirris R46 shocks. If you upgrade your bike with a larger battery, we recommend going up one spring rate to accommodate the heavier bike weight. Surron Ultra Bee shock springs require a spring compressor because of the short shock length. Max preload = 20mm For help changing out and installing new springs in your shock, see the service section here for detailed instructions.