Softrider access hd bicycle carriers mount to your receiver hitch. The Softride Access HD 4-bike hitch rack boasts a tough, thick steel construction with a reinforced top plate and an auto-locking mechanism to secure the bike arms and allow for easy bike arm removal. It comes with an integrated cable lock and a hitch lock. The Access HD Rack - the next generation of Access Racks. The HD rack has been designed to be the most durable hitch mounted rack on the market while providing the same ease of entry to the rear of the vehicle synonymous with Softride Access rack series. Engineered with thicker steel and the toughest components, the HD rack has endured the most rigorous testing of any rack on the market and proven its durability. Every part of this rack and every one of the HD's motions has been successfully tested through 3120 cycles in temperatures ranging from -40 degrees Fahrenheit to +185 degrees Fahrenheit. This means no cracks, fractures, deformation, or dimpling is there any other hitch mounted rack on the market that can say this? Equipped with a reinforced top plate and an auto-locking mechanism to secure the bike arms and allow easy bike arm removal, the HD is more than ready for the roughest trips any biker can take. If you are the hard core enthusiast that demands the best and toughest on the market, Softride's HD is for you. Just so you know, the HD stands for Heavy Duty. Not in terms of weight, although it will carry four bikes without breaking a sweat. The HD is in terms of the abuse it will take. We tested every piece, connection, component and motion in temperatures ranging from -40 degrees (think, summer in Antarctica) to 185 degrees Fahrenheit (Hello, Equator). But don’t let the extra steel and tough components distract you. This rack is easy and convenient. To load up to four bikes, just swing the loading platform down (notice: it stays parallel the whole time). You only need to lift your bikes a couple of inches off the ground. Use the sturdy straps and locking system to secure your bikes, and swing the platform back up. It snaps into place. And you can still get into your trunk on the trip home. You might not spend a season in Antarctica, and you might not spend a lot of time in Death Valley (Or Las Vegas in July), but if you do, we can help you take your bikes with you. You might think you’ve seen a hitch-mount rack like the Softride made by someone else, but it’s not the same.