[Heavy Duty Double Arms]: Constructed with high-strength forged steel, this bike rack hitch’s carry capacity is up to 180lbs and can transport four bikes at the same time (Beginning with the largest/heaviest bike first). Provides 6” of space between each bike to minimize bike to bike contact. [SGS Approved Rubber Strap]: This hitch bike rack features SGS approved rubber straps, its damage resistant ability is twice the normal straps and 6,000 cycles is guaranteed. Additional tie down straps and stabilizer straps are included to decrease the amount of movement and cut down on wear and tear. [Lightweight Design&Tilt Mechanism]: At just 26.5 lbs, it’s easy to lift on and off the car. The pin-locking tilt function swings the rack down, so you can reach your gear in the back without removing the whole system (Notice: please take your bikes off first). [Anti-Rattle Hitch Tightener ]: The receiver hitch tightener helps to steady the rack and greatly minimizes wobbling and keep thieves from removing the entire rack from your car at the same time. [Warranty]: We offer 2 years factory warranty, if you have any problems, please feel free to contact us. A top tube adapter is needed when carry some bikes with slanting top tubes.