How to Easily Shift a 21 Speed Mountain Bike: A Comprehensive Guide
To shift a 21 speed mountain bike, first, ensure that you are pedaling at a moderate pace and then move the gear shift lever located near the right-hand grip. You can move the lever either up or down to change the gear. Moving it up will increase the gears, making pedaling harder but faster, while moving it down will decrease the gears, making pedaling easier but slower. To shift the front gears, use the lever located on the left-hand grip. Move it up to shift to a higher gear and down to shift to a lower gear. Always make sure to pedal lightly when shifting gears to prevent damaging the chain or gears.