Product Description Mounting your Old Man Mountain Racks to thru-axle became just easier with the Old Man Mountain Thru Axle Fit Kits for rear wheel. Axle mounting also increases the load capacity of the racks and is safer than eyelet mounting, because most eyelets are only made for fenders and have very low weight limits.  Product Specifications: Version/Design:Rear wheel (RW) Application:All Mountain, City, Cross Country, Enduro, Gravel, MTB, Road, City & Touring Technical Information: Nominal diameter:M12 Axle type rear:Thru-axle type 1: Axle diameter rear:12 mm type 2: Axle diameter rear:12 mm type 3: Axle diameter rear:12 mm type 4: Axle diameter rear:12 mm type 5: Axle diameter rear:12 mm type 6: Axle diameter rear:12 mm type 7: Axle diameter rear:12 mm Compatibility: Type 1:Thread pitch: 1.75 mm Axle length: 229 mm; 217 mm with spacer Manufacturer number:SET810Type 2:Thread pitch: 1.75 mm Axle length: 180 mm; 168 mm with spacer Manufacturer number:SET811Type 3:Thread pitch: 1.5 mm Axle length: 165 mm; 159 mm with spacer Manufacturer number:SET812Type 4:Thread pitch: 1.0 mm Axle length: 172 mm; 160 mm with spacer Manufacturer number:SET813Type 5:Thread pitch: 1.5 mm Axle length: 178 mm; 169 mm with spacer Manufacturer number:SET814Type 6:Thread pitch: 1.5 mm Axle length: 188 mm; 176 mm with spacer Manufacturer number:SET822Type 7:Thread pitch: 1.0 mm Axle length: 184 mm; 175 mm with spacer Manufacturer number:SET826 Product Features: 12 mm axle diameter. Made with Aluminium (6061). Axle Mounting Protects your frame. The Fit Kits make it easy to mount and remove the racks.  Manufacturer Number: type 1: SET810 type 2: SET811 type 3: SET812 type 4: SET813 type 5: SET814 type 6: SET822 type 7: SET826 Contents: 1 x Thru Axle Old Man Mountain Fit Kit Rear 2 x Pucks 4 x Heavy-duty zip ties 2 x Protective film 2 x M5 x 12 bolt 2 x M5 x 20 bolt 2 x M5 spring washer 2 x M5 flat washer 2 x M5 locknut 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