Wilbers Zero Friction Progressive Fork Springs -30mm / F800GS '13-'18

This -30mm Wilbers fork lowering spring kit is designed to shorten the stock height front fork of the F800GS 2013-on by 30mm. The kit comes with forks springs, and bushings that get installed under the damper rod inside the cartridge, reducing the length of the cartridge and the overall length of the fork which lowers the front end. They are designed to be used with a shorter length rear shock to lower the bike equally front and rear.

Wilbers Zero Friction Progressive Fork Springs have some advantages over linear fork springs for long travel adventure bike forks due to their two stage design. The first stage is 5.0 N/mm which is same as stock but it increases in rate by 20% as it compresses up to 6.0 N/mm to provide better chassis control during weight transfer such as when riding down a steep decline or under heavy braking, while still providing good compliance over the small bumps. 

Don't forget to order Fork Oil! You will need 2 Liters. The 2013-on WP fork uses a very thin fork oil, we recommend 2.5 wt  Motorex, our part number 580-0520 which is similar in viscosity to our Maxima 5 weight fork oil which will also work. Using heavier fork oils such as the BMW recommended "Type 2" oil will result in a very harsh ride on this particular WP fork. See below to order.

The stock BMW fork seals introduce a lot of stiction. We highly recommend our SKF fork seals, see below to order.

Pump the damper rod several times to expel all air and set the air chamber to 70mm. The air chamber is simply the distance from the oil level up to the top of the fork tube with the spring removed and the fork fully compressed. This can be done with a tape measure or more conveniently with our fork oil level tool. See below to order.