Pyöränmittojen

Pyöränmittojen refers to bicycle wheel sizing in Finnish. Understanding wheel sizes is crucial for selecting the correct tires, inner tubes, and sometimes even for ensuring proper frame fit. The most common wheel sizes are expressed in inches or millimeters, with variations in diameter and bead seat diameter (BSD) playing a significant role.

Historically, wheel sizes were often designated by numbers like 26-inch or 27.5-inch, with 29-inch becoming increasingly popular for mountain bikes. However, these numbers can sometimes be ambiguous as they don't always refer to the exact outer diameter of the tire or the BSD. More precise measurements, often seen in millimeters (e.g., 622mm for a 700c road bike wheel), relate to the rim's BSD. This standardized measurement is vital for compatibility.

Tire sizing often includes both the wheel diameter and the tire width. For instance, a tire might be labeled 700x25c, indicating it fits a 700c (622mm BSD) rim and has a nominal width of 25mm. Different types of bicycles, such as road bikes, mountain bikes, gravel bikes, and children's bikes, utilize distinct common wheel sizes. Choosing the correct pyöränmittojen ensures optimal performance, comfort, and safety for the rider.