How to Put a Chain on a Mountain Bike: A Beginner’s Guide
To put a chain on a mountain bike, first, shift the bike into the lowest gear and release the brake. Thread the chain onto the rear cassette and then feed it through the rear derailleur pulleys. Place the chain around the front chainring and adjust the tension by pulling the derailleur cage back and tightening the quick-release skewer on the back wheel until the chain has the proper tension. Finally, test ride the bike and adjust the gear shifting if necessary.