Interlocking caseMade of self reinforced Curve material suitable for road bikes, mountain bikes and Triathlon bikes with 29 inch wheel guardsHighly impact resistant, abrasion resistant, tough and durableFour easy rolling wheels, two which rotate freely and two fixedFour handles: one adjustable pulling handle, one pulling handle to pull on two wheels, two handles to carry51.6 x 35.8 x 12.4 inches