TITAN Prime All Alloy Frame Suspension All-Terrain Mountain Bike (ATB) - 26" Alloy Wheels - 18" Frame - Shimano Parts - Light Weight Bicycle - Will not Rust Bike Type: Mountain Bike--Are super versatile, you can ride them in the dirt or ride them on the pavement. Bike Frame Material: Alloy--Lightweight, strong and responsive frame material. Type of Shifter: Shimano Rapid Fire --You choose gears by pulling a forefinger trigger or pushing a thumb button, which puts the bike in the next-higher or next-lower gear. Front Brake: Promax V-Brakes--Reliable design that provides you with sure stopping power. Rear Brake: Promax V-Brakes--Reliable design that provides you with sure stopping power.