Entry-Level Performance: Tailored for newcomers to the world of mountain biking, making a balance between affordability and functionality. Durable and stable steel mountain bike frame makes stable and safe riding. Bump Absorption: Knobby mountain tires to smooth out the bumps along the way, offering stability and balance to riders on all terrains and in all weather conditions. Speeds: The KIAPALNO 21-speed mountain bike has twist shifters and a smooth rear derailleur to help you find the perfect cadence to navigate your path ahead. Control: Front and rear linear-pull brakes provide control and strong stopping power. Lighter and easier to control. Ideal Rider: This bike is designed for boys/men aged 13 and up. 26-inch tires with 16-inch frame suitable for 5'2 -6'2 Riders; Max weight capacity is 300lbs. Quick Assembly: We make assembly a breeze - 86% pre-assembled with included tools and you'll be riding in no time. You can also refer to the assembled video on the product page.