- UNIVERSAL COMPATIBILITY: Designed for bicycles and tricycles, this mechanical speedometer is crafted from durable aluminum alloy, ensuring long-lasting performance. - PRECISE MEASUREMENT: This pure mechanical bike computer delivers reliable data, displaying total mileage and single trip distance. The side knob allows you to reset the single trip distance to zero with ease. - SPECIFICATIONS: Compatible with 26", 27.5", 28", and 29" bikes. Installation is straightforward, making it user-friendly. Size: Approximately 12.85 cm / 4.72 in x 15.2 cm / 6 in. Weight: Approximately 342 g. - STURDY AND WEATHERPROOF: Constructed from high-quality materials, this bike odometer is built to withstand various weather conditions, ensuring durability and reliability on all rides. USE SCENARIOS: 1. Track your daily commute or exercise routes with accurate mileage readings, helping you monitor your fitness goals. 2. Ideal for long-distance cyclists who need to keep a precise record of their travels over different terrains. 3. Perfect for leisure riders who want to know the distance covered during weekend outings or family bike rides. This speedometer combines functionality and durability, making it an essential accessory for any cycling enthusiast.