Classic Portage Sliding Dropout Plates - Replacement plates for Hayduke, Japhy, Lorax, Watchman and Walden bikes that use 12mm Through-Axle. M12x1.75 thread pitch. Use 167mm Axle length for 142 spacing on Lorax, use 174mm Axle length for 148mm spacing on Hayduke and Japhy. These plates are IS Brake Mount, 160mm rotor native. This means use a +0 adapter for 160mm, and a +20mm adapter for 180mm rotors. These plates are not compatible with the new UDH plates. Bikes must use the same dropout insert type Left and Right.