The Raleigh Chase 27.5" Dual Suspension Mountain Bike combines the agility and the acceleration of a 26" bike with the increased stability and rollover performance of a 29" bike, it is the best of both worlds. The lightweight aluminum frame, suspension fork and a 4-bar rear suspension system, making it a great option for tearing up the trails. The shifting system is from the best company in the industry, Shimano. The EZ-Fire shifters, paired with the Shimano derailleurs, make for accurate and smooth shifting all ride long. The wheel sets are built with trail riding in mind, with strong alloy double-wall rims - but don't worry, the alloy disc brakes will slow you to a stop whenever they are called upon.