2021 ATC MC300 Motorcycle Trailer. The Quest Motorcycle Trailer is our top of the line package of features built on our premium Quest frame. It's soundly built on a lightweight, rust free aluminum frame that will hold up over years of travel in inclement weather. It's constructed on top-of-the-line BuildPro® modular fixed weld tables that allow for industry leading frame precision. And, our aluminum is pound for pound twice as strong as industry standard steel. Tensile Strength: Aluminum = 110ksi/lb vs. Steel = 58 ksi/lb