# How To Determine Bike Tire Size

### You should now be able to accurately measure your bike s tires whenever the need arises.

How to determine bike tire size. The most common sizes are. Standard bike tire sizes place the diameter first and the width second. A tire size you might see on a road bike. His calculator uses an pre defined diameter for every rim tire combination and his diameters are almost always different than what the math would predict.

The size of the bike tire is one of the commonly ignored aspects among the casual riders. So if your diameter was 26 inches and the width came out to 2 2 inches the printed measurement would be 26 x 2 2. Although measuring a bicycle wheel including determining the size of both the tire and the rim can be accomplished by either of two methods both are simple to complete. Sometimes you might even need to know the circumference of a bicycle wheel which is also a simple determination that can be achieved in multiple ways.

A tire size you might see on a mountain bike. 700x25c indicates a tire with a 700mm outer diameter and a 25mm width. How to determine tire size. A iso tire size of 28 622 which of course is backwards b c it s european from how we would refer to a 700 x 28c tire has a tire width of 28 mm and a rim diameter of 622 mm.

As we will learn more later. That wasn t as hard as it initially seemed. To get the approximate diameter of the wheel with the tire on you would take the diameter of tire x 2 because it s both on the top and bottom the diameter at. The venerable sheldon brown has a gear calculator that uses a different method to determine wheel size.

12 inch 16 inch 20 inch and 24 inch. Obviously the tires that came with my bike aren t ideal for road conditions and i was wondering what type and size of tire i would need as sizing is a little bit confusing. I currently have front tyre schwalbe smart sam active 57 621 and rear tyre schwalbe smart sam active 57 622 on rims cube ex23 36h disc tubeless ready. You may need to know the size of your tires for various reasons such as for a spare tire or when purchasing wheels rims or snow tires.

However measuring the tire size manually with a tape measure will not. In most cases riders usually go with whatever bike tire that will come along or leave the task to the local bike shop when it s time to replace or upgrade a tire. Remember to get yourself a 150 psi portable pressure detection electric bike pump after knowing the right tires to buy for your bike. The wheel size is based on the diameter of the tire see below and as each tire size gets larger so does the size of the bicycle frame.

### Complete Bike Frame Size Guide Bike Frame Measurement Size

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