Giant ATX - Vibrant BlueWith a rugged personality and a smooth riding style, ATX features the familiar flat handlebar look of a traditional mountain bike. It has a lightweight, durable ALUXX aluminium frame and a suspension fork with 80mm of smooth travel to soak up bumps. The wheel diameter varies based on bike size, with 26 inch wheels on smaller frames and 27. 5 on larger ones, this tailors the bikes handling to a riders height. Integrated mounts make it easy to add racks