The RockyMounts HotRod Interchangeable Thru Axle Mount solidly mounts to your truck bed, securely transporting your mountain bike to the trail. It fits wide variety of thru axle standards, with three included sleeves accommodating 12x100, 15x100, and Boost 15x110 millimeter thru axles. This customizable mounting platform is primarily intended for truck beds, but it also works great attached to trailers. Its cast aluminum base features two holes for mounting to a wide variety of platforms. You have the option of using either 0. 25in or 6mm bolts for installation. It doesn't lock to your bike's suspension fork, instead relying on you to thread a cable style lock through its large opening for theft deterrent. Please note, mounting screws aren't included, and the user needs to drill holes through the truck bed or installation surface before mounting.