Old Man Mountain Fit Kit Rear Thru Axle for Fatbikes

Mounting your Old Man Mountain rack to the rear of your fat bike has never been easier – with the Old Man Mountain Fit Kit thru axle for fat bikes. Mounting via the axle not only increases the load capacity of the racks but is also safer than mounting to eyelets, as most eyelets are designed only for fenders and can only carry light loads.

Type 1:

Nominal diameter: M12
Thread pitch: 1.75 mm
Axle length: 229 mm; 217 mm with spacer
Manufacturer part number:

SET807

Type 2:

Nominal diameter: M12
Thread pitch: 1.5 mm
Axle length: 229 mm; 223 mm with spacer
Manufacturer part number:

SET808

Type 3:

Nominal diameter: M12
Thread pitch: 1.75 mm
Axle length: 209 mm
Manufacturer part number:

SET809

Type 4:

Nominal diameter: M12
Thread pitch: 1.0 mm
Axle length: 229 mm; 217 mm with spacer
Manufacturer part number:

SET709

• 12 mm thru axle, specially developed for rear rack mounting on fat bikes.


• Axle mounting protects the frame.


• The Fit Kits allow for easy installation and removal of the rack.

• type 1: SET807
• type 2: SET808
• type 3: SET809
• type 4: SET815

• 1 x Old Man Mountain Fit Kit thru axle rear for fat bikes


• 2 x Adapters (pucks)


• 4 x Heavy-duty zip ties


• 2 x Protective film


• 2 x Screw M5 x 12


• 2 x Screw M5 x 20


• 2 x Spring washer M5


• 2 x Washer M5


• 2 x Locknut M5