29Impasse Aluminum Front Suspension Mountain Bike Rugged, stylish and ready for a day on the trail, the 29Impasse FS is ready to chew up the dirt. The most defining quality of this mountain bike is its 29large wheel, which allows you to roll over the toughest terrain. Featuring full frame and front fork shock suspension, dual disc brake stopping power and an aluminum mountain bike frame, the Impasse FS is ready to take on whatever you're ready to dish out. Color: Silver.