Lockable shock absorber – Easily switch between city and off-road modes by locking or unlocking the shock absorber to adapt to various terrains. 24-speed Shimano shifting system – Provides smooth and accurate gear changes for both steep climbs and fast descents. Lightweight aluminum alloy frame – Built for strength and durability, the frame reduces rider fatigue while offering enhanced stability. 27.5-inch large wheel diameter – Ensures a smoother ride over gravel and obstacles, reducing bumps and minimizing side-slipping. CST non-slip tires – High-quality, wear-resistant rubber tires with excellent grip, perfect for a variety of road conditions.