Using the Aris 31.8mm Stem is easy. First, make sure your handlebar has a diameter of 31.8mm to ensure a proper fit. Then, attach the stem to the handlebar using the four - bolt faceplate and tighten the bolts securely. When it comes to the angle, you can choose either +7 deg or -7 deg according to your riding preference. As for maintenance, regularly check the bolts for tightness to prevent any loosening during your rides. Clean the stem with a mild soap and water solution to keep it looking good and functioning well. Also, avoid exposing it to extreme conditions for long periods as this might affect its alloy material over time.