Öhlins Fork Spring 38.5/450/6.0 FKA 105

Length: 450 mm
Inner diameter: 28,3 mm
Outer diameter: 38,5 mm
Wire diameter: 5,1 mm
Rate: 6 Nm
Stroke: 258 mm
Part no.: 08418-60

Based on the well proven NIX technology from our Road & Track product line, Öhlins developed the FKA cartridge kits for Adventure Bikes improving these in terms of comfort and overall performance.

Thanks to the FKA cartridge kits from Öhlins the bike now has a fully adjustable front end. Rebound damping is on one leg and compression in the other leg, with adjustable spring preload in both legs. Different springs are available for riders individual demands as well as an effective hydraulic stop inside the kit to prevent bottoming.

Front fork springs and oil need to be ordered separately. Spring rate recommendations can be found in the mounting instruction.

Technical data

Fits for vehicles

• BMW F 800 GS (2013 – 2017)
  • ABE (Germany)
• BMW F 800 GS Adventure (2013 – 2017)
  • ABE (Germany)

Downloads

• Datasheet

Fork springs for Öhlins FKA 105 cartridge kit.

Recommendations

• FKA 105 springs 5,0 N/mm
• FKA 105 springs 5,5 N/mm

How to Read Öhlins Spring Numbers

The numbers are separated by slashes and always follow this order:

Diameter / Free Length / Spring Rate
Some springs add the stroke: Diameter / Free Length / Stroke / Spring Rate

• Diameter (mm): the size of the spring, so it fits your shock or fork. A range (e.g., 65.5-63.5) means the diameter changes along the spring.
• Free Length (mm): the uncompressed length from end to end.
• Stroke (mm): only when 4 numbers are given. How far the spring can compress before the coils touch.
• Spring Rate (N/mm): the stiffness. One number (e.g., 90) is linear, the same stiffness throughout. A range (e.g., 22-30) is progressive, getting stiffer as it compresses.
• Tapered: one end of the spring is narrower. The diameter shown is the main body.

Examples

• 57/200/90: 57 mm diameter, 200 mm long, 90 N/mm linear.
• 65.5-63.5/255/60: 65.5–63.5 mm diameter, 255 mm long, 60 N/mm linear.
• 46-55/240/135/22-30: 46–55 mm diameter, 240 mm long, 135 mm stroke, 22–30 N/mm progressive.
• 35.9/290/9.0 Tapered: 35.9 mm diameter, 290 mm long, 9.0 N/mm linear, one narrower end.