Transforms into any of 8 configurations in 2 seconds Lightweight steel frame easily expands from 26 to 39 inches in length Non-skid bed surface resists load slippage Meets airport baggage requirements New R Trac wheels are lightweight and smooth-riding. The Rock N Roller MultiCart - R2 Micro w/ R Trac is the smallest model in the RNR line handling up to 350 pounds. The rugged steel frame expands from 26 to 39 long with 25 and 20 foldable sides. This convertible cart ingeniously changes shape and length for varying load sizes and folds small for storage. Specifically designed to meet the requirements of car and air travel Rock N Roller Multi-carts are the best-selling carts in the music industry. Now equipped with R-Trac wheels and brakes the critically acclaimed Rock-n-Roller Multi-Cart instantly transforms into any of 8 configurations replacing the need for 8 different carts. It can carry huge loads yet fold small for storage. The patented Rock-n-Roller Multi-Carts are considered so innovative that they are even featured in college engineering texts books for outstanding design. 2-wheel hand truck formation has a long nose and stair climbers to maneuver bulky equipment over stairs and curbs 25/20 (front/rear) foldable sides rotate and lock into place easily. Perforated front axel reduces weight. R Trac wheels provide a super light weight pneumatic-like ride 4 x 1 inch front swivel casters with soft thermoplastic tread for a smooth quiet ride. Despite being the smallest cart available in the Rock N Roller product line the R2 micro multi-cart can carry up to 350 pounds. Transformable into eight different configurations it can be positioned vertically or horizontally and folds up small enough to fit into your trunk or meet airport baggage requirements. The cart's R-Trac wheels and brakes provide you with a smooth ride and total control over the cart's motion while the nonskid bed surface ensures your load stays in place the whole time.