The Deore SL-M5100 11 Speed Shift Lever offers light and responsive shifting at an incredibly affordable price. It benefits from the advanced technology trickled down from Shimano's high - end components. With 2 - way release, you can shift up to 3 gears at once using the main lever. It also features improved cockpit integration, allowing you to mount it directly to the brake lever via the I - Spec EV system. This shifter is a great pick for those using the Deore M5100 drivetrain or anyone with a Shimano 11 - speed setup who needs a replacement. It has an 11 - speed design. If you're looking for a 12 - speed (M6100) Deore shifter, check the link below. The shifter is made of an aluminium bracket, shell, and a glass fibre reinforced polymer lever body and base cover. It comes with 22.2mm and I - Spec EV mounting options. The package includes the shifter, shifter cable, cable housing, cable crimp, and end caps. The pros are that it offers similar technology and shifting performance as Shimano's top - end products at a much lower cost. The cons are that there are no rubber gripper pads on the shifter paddles, and the shifting may not feel as crisp as premium options.

Using the Shimano Deore SL - M5100 shifter is easy. First, choose the mounting option that suits your bike, either the 22.2mm or the I - Spec EV. If you choose the I - Spec EV, you can directly mount it to the brake lever for better cockpit integration. When you're riding, use the main lever to shift gears. Thanks to the 2 - way release, you can shift up to 3 gears at a time. As for maintenance, regularly check the shifter cable and housing for any signs of wear or damage. Replace them if needed. Keep the shifter clean by wiping it with a dry cloth after rides. Avoid exposing it to extreme temperatures or harsh chemicals. If you notice any issues with the shifting performance, like it becoming sticky or unresponsive, you may need to take it to a professional bike mechanic for a tune - up.