This aluminum alloy square road bike bottom bracket is designed for durability and low resistance. It features Taiwanese imported bearings and a lightweight axle housing. The bearing set is available in various lengths, including 110.5mm, 113mm, 116mm, 118mm, 120mm, 122.5mm, 124mm, and 126mm. It is compatible with 68mm five-way tubes and is suitable for road bikes. The product weighs approximately 350g and is made from high-quality aluminum alloy. Please choose the correct length to ensure proper shifting.