Non-electric model Features: PROFESSIONAL 21-SPEED SHIFTING SYSTEM：Unlike some sellers who use low-cost parts, our bike uses the premium TZ500 derailleur and TX30 shift lever allowing you to switch gears with smoothness by only pressing the button. The powerful mechanical dual disc brakes provide a stronger braking effect and a more sensitive braking response. COMFORTABLE RIDING EXPERIENCE：The wide up to 4" tire and lock-out suspension fork provide a double shock effect for a smoother-feeling ride. With an adjustable seat and an ergonomic cushion, our bike can better meet the different heights of people. STRONG DURABILITY：The premium high-carbon steel material combined with excellent welding technology for unmatched durability and strong support strength. The stem is made of sturdy alloy material making riding safer. EASY TO ASSEMBLE：The bike is 85% assembled so you just need to install the handlebars, front wheel, saddle, and pedals as directed by the instructions. After assembly, it can conquer any off-road trails, city roads, beaches and snow. FOR MULTIPLE PURPOSES：Made of non-slip and explosion-proof materials, our 4" wide tires can easily challenge gravel paths, dirt paths, and rocky roads as well as this bike also is used on rainy days. Any problem pls feel free to contact us by email. Specification: Bike Type：‎Mountain Bike Age Range (Description)：Adult Number of Speeds：‎21 Color：‎black&red Wheel Size：‎26 Inches Frame Material：‎Carbon Steel Suspension Type：‎Dual Special Feature：‎Dual Disc Brake Included Components：Lock Size：‎26 inch Brake Style：‎Disc Specific Uses For Product：‎Gravel, Dirt, Rocky, Rainy Item Weight：47.5 Pounds Style：‎Off-road Mountain Bike Wheel Material：‎Aluminum Seat Material Type：‎PU, PP, and other materials Assembly Required：‎Yes Bicycle Gear Shifter Type：‎Trigger Number of Handles：‎1 Skill Level：‎Beginner Material：High-Carbon Steel Hand Orientation：‎Right What You Get: 1 x 26" Mountain Bike