Spring: Mechanical, PM disc brake, quick release, aluminum alloy. Specifications: QR: 9mm*100 mm, manual locking, made of high quality aluminum alloy, weight: about 2453 grams. Dimensions: 20 inches, straight, 1-1/8 inches, travel 100 mm, riser: 28.6*210mm. Design: The unique U-shaped structure makes the mountain bike safer and more stable, and the mountain bike shock-absorbing front fork is easy to install and remove. Stickers: The stickers (red, yellow, blue, green, orange) on the shock fork are well-designed, fashionable/beautiful/trend; at the same time, you can tear them off according to your own preferences without leaving any traces.