What size mountain bike tires do I need for my bike?
To determine the size of mountain bike tires you need for your bike, you should check the current tire size on your bike's tires. The size is usually printed on the sidewall of the tire. Common sizes for mountain bike tires are 26 inches, 27.5 inches, and 29 inches. Make sure to get tires that match the size of your current tires to ensure they fit properly on your bike.