Product Description 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. Product Specifications: Application:All Mountain, City, MTB, City & Touring Compatibility: Type 1:Nominal diameter: M12 Thread pitch: 1.75 mm Axle length: 229 mm; 217 mm with spacer Manufacturer part number:SET807Type 2:Nominal diameter: M12 Thread pitch: 1.5 mm Axle length: 229 mm; 223 mm with spacer Manufacturer part number:SET808Type 3:Nominal diameter: M12 Thread pitch: 1.75 mm Axle length: 209 mm Manufacturer part number:SET809Type 4:Nominal diameter: M12 Thread pitch: 1.0 mm Axle length: 229 mm; 217 mm with spacer Manufacturer part number:SET709 Product Features: 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. Manufacturer Number: type 1: SET807 type 2: SET808 type 3: SET809 type 4: SET815 Contents: 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 Manufacturer: Old Man Mountain 61560 American Lane Bend OR 97702 USA info@oldmanmountain Distributor: MERIDA & CENTURION Germany GmbH Blumenstraße 49-51 71106 Magstadt Germany vertrieb@merida-centurion.com