Mountain Bike Chain Jumping. Your chain, more specifically the cables that connect the shifters to the derailleurs to move the chain from cog to cog, need the tension adjusted. In the first few rides on a new bicycle, the cables stretch the most.
Trek is the world leader in mountain bike technology. To fix a slipped bike chain, first, turn your bike upside down, as this will make it a lot easier to reattach the chain. It doesn't happen to my bike all the time but it tends to happen at the most critical moment when sprinting up a steep grade.
Chain jumps or slips when I pedal hard.
Get prepped for manuals, bunny hops and jumping by following these guidelines.
However, using the correct technique is critical to your safety. Plus, this activity opens up a whole world of fun. Note which gear these are on so you can place the chain back in the right place.