Diamondback Bicycles Recoil Trail Full Suspension Mountain Bike with 27.5-Inch Wheels DB Recoil aluminum frame with an optimized single pivot design and 4" of travel provided by a coil shock with oil damping Suntour XCM suspension fork has 120mm of travel; External preload adjustment helps to better customize the fork to your weight & riding style Tektro Aires mechanical disc brakes will help you stop in most any condition with ease Suntour triple chainring crank & 8 cog cassette give you 24 speeds to choose from when riding 27.5" wheels are big enough to get you over obstacles, but still compact enough to give you a fun and snappy ride