NEW RAM GPS BICYCLE BIKE OR MOTORCYCLE MOUNT FOR Magellan Sportrak Magellan Sportrak ATV Magellan Sportrak Color Magellan Sportrak Map Magellan Sportrak Marine Magellan Sportrak Outdoor Magellan Sportrak Pro Magellan Sportrak Topo Zinc u-bolt base will accommodate railings between 0.5" and 1.25" in diameter Patented ball and socket system allows for fine adjustments LIFETIME WARRANTY MADE IN THE USA