How to Properly Shift Gears on a Shimano Mountain Bike: Tips and Techniques
To shift gears on a Shimano mountain bike, first make sure you are pedaling lightly and standing up on the pedals. Use your right thumb to shift up to a higher gear or your index finger to shift down to a lower gear. Use your left thumb to shift to the different chainrings. The chain should move smoothly to the new gear. Test the new gear by pedaling a few strokes.