The Shimano Altus M371 Series front crankset is optimized for Shimano Hyperglide chains, offering a smooth drive train transmission and enhanced shifting. It comes with a black chain guard. Specifications include 3x9 speed, 170mm crank arm length, 48/36/26T chain ring combination, 50mm chain line, compatibility with HG 9-speed chains, a included crank fixing bolt, recommended BB-UN300 (threaded) bottom bracket, and a Q-factor of 180.5mm.

Using this Shimano front crankset is easy. First, make sure to pair it with the recommended BB-UN300 (threaded) bottom bracket and a compatible HG 9 - speed chain. Install the crankset following the standard procedures for bike parts installation. When riding, you'll notice the smooth drive train transmission and enhanced shifting. As for maintenance, regularly clean the chain rings and the chain guard to prevent dirt buildup. Check the crank fixing bolt periodically to ensure it's tightened properly. If you encounter any issues with shifting, it might be a good idea to have a professional bike mechanic take a look. Also, avoid using it with non - compatible chains as it can affect performance and potentially damage the parts.