How to Effortlessly Change Gears on Your 18-Speed Mountain Bike
To change gears on an 18-speed mountain bike, first, understand that the left shifter controls the front chainring, while the right shifter controls the rear cassette. To shift to a lower gear, spin the pedals while pushing the right shifter inwards, and to shift to a higher gear, pedal while pulling the shifter outwards. To shift to a lower gear on the front chainring, use the left shifter while simultaneously shifting up the gears on the rear cassette using the right shifter. Practice changing gears when going uphill, downhill, or on a flat surface to improve your skills.