Put A Trap In It.Transport your bikes your way with Saris Thru Axle Traps Bike Fork Mount Truck Designed. Got a bike trailer? Put a Trap in it. How about a truck bed? Put a Trap in it. You get the point. The bicycle fork mount is made proudly made in USA. The Saris Thru Axle Traps bike block fork mount is versatile enough to be mounted solo in a variety of things that go (vans! RVs! Vehicles with Hatches!). For a less permanent installation, these bike fork mounts can be used with the Traps Triple Track and Single Track specialty racks. Bonus: the Traps Wheel Holder is also compatible. Traps Triple Track, Traps Single Track and Traps Wheel Holder sold separately.Thru Axle Traps (TR4BLK): An all-in-one design that fits four thru axle spacing standards. 15mm x 100mm 15mm x 110mm 12mm x 100mm 20mm x 110mm