How to Properly Adjust the Shifter Cable on Your Mountain Bike
To adjust the shifter cable on a mountain bike, first, shift the bike to the smallest sprocket and loosen the rear derailleur cable bolt. Then, adjust the barrel adjuster until the chain lines up with the gear properly. Test the shifting by shifting through all the gears and fine-tune the barrel adjuster as necessary. Finally, tighten the cable bolt and ensure that the chain shifts smoothly.