How to Properly Install a Shifter Cable on Your Mountain Bike
To install a shifter cable on a mountain bike, first, shift the gears to the smallest cog and loosen the shifter cable anchor bolt. Then, thread the new cable through the derailleur and the cable housing, and pull it tight. Use pliers to secure the cable in the anchor bolt, and make sure it is adjusted properly by shifting through all gears. Trim any excess cable and test the shifting before riding.