What tire size fits my bike?
Tire width affects handling, rim compatibility, and the clearance available in your frame and fork. You can find the correct size on the sidewall of your current tire. For MTB tires, the size is usually given in inches, for example 29×2.50. The number 29 refers to the wheel diameter, while 2.50" indicates the tire width. For road, gravel, or city bikes, the ETRTO size is the most important reference, such as 40-622. Here, 40 describes the tire width in millimeters, while 622 indicates the inner diameter. The inner diameter must always match your rim, so the tire fits correctly. Tire width can be adjusted slightly, provided your rim and frame offer enough clearance. If you need help choosing the right size, our bike tire size guide explains everything step by step.