How to Change Rear Sprocket on Mountain Bike: A Step-by-Step Guide
To change the rear sprocket on a mountain bike, first, remove the wheel from the bike. Use a chain whip tool to keep the cassette from turning while using a cassette lockring tool to loosen and remove the lockring. Slide off the old sprockets and replace them with the new ones in the desired order. Put the lockring back in place and tighten it. Finally, put the wheel back onto the bike and adjust the derailleur if needed.