Cross Country With speed and pedaling efficiency in mind, cross country (XC) bikes are the lightest mountain bikes with the least suspension travel (typically 0 - 120mm). Trail Trail bikes are the quintessential “mountain bikes.” If you’re heading into the woods expecting to do it all on two wheels – climbing, technical sections, AND fun descents – you’re looking for a trail bike. Gravel Think of gravel bikes as the SUVs of the road bike world. Designed to excel on rougher roads, gravel bikes combine drop bar efficiency with mountain bike comfort, making them ideal for a variety of two wheeled adventures.