How to Easily Change the Rear Tire on a Mountain Bike
To change the rear tire on a mountain bike, first, shift the chain to the smallest gear on the rear cassette, then release the brake and remove the wheel from the frame. Once removed, deflate the tire and use tire levers to release it from the rim. Next, place the new tire onto the rim and inflate it to the recommended pressure. Finally, reattach the wheel to the frame, making sure it is fully seated and the brakes are adjusted properly.