Details: Quality construction makes the RMA, available only at, a Mountain trail bike that performs equally well for gravel paths and for street riding. Backed by our limited 10-year frame (see owner s manual for details), The lightweight hardtail frame is molded from tough 6061 heat-treated aircraft-grade aluminum, and will never rust! Durable aluminum, lighter than steel, makes this bike easier to Accelerate, easier to maintain Momentum, and easier to handle. We deliver this bike with the tools you need to quickly finish Assembly so you can get riding! Choose the right size bike! Make sure your inseam is longer than 31. 25 inches to fit the stand over height for this 18-inch frame! Select 18, 20, or 22 Inch frames for men, and 15 or 17 Inch frames for women. An alloy quick release binder enables easy height adjustment of the padded saddle for a proper fit. Quality matters and Royce Union makes sure that the quality of the RMA will meet your high expectations. Passionate about the outdoors? Welcome to Royce Union mountain bikes. Since 1904.