Features and BenefitsBike Type: Mountain Bike--Are super versatile, you can ride them in the dirt or ride them on the pavement. Bike Frame Material: Aluminum--A light material that offers you a responsive ride. Type of Shifter: SRAM Thumbshifters--Refers to the small levers attached to the handlebar that you work with your thumbs to select individual gears. Front Brake: Disc--Powerful stopping that is easy to control, with no heat transfer to rims. These brakes will give you great braking even in muddy conditions. Rear Brake: Alloy Linear-Pull Brake--Designed to give you powerful and reliable braking. Brakes: Mechanical Disc Front/ Linear Pull Rear--Powerful stopping that is easy to control, with no heat transfer to rims. These brakes will give you great braking even in muddy conditions. Rear Derailleur: SRAM Index--Gives you smooth and precise shifting every time. Saddle: Padded--Provides you with a soft seat that will allow you to enjoy longer rides in comfort. Rims: Alex--Made