Road Bike Tire Size For Computer

The easiest way of how to determine the wheel size for a bike computer is to roll the bike on the ground.

Road bike tire size for computer. 25 622 is the international standardization organization iso way of identifying the 700x25c tire in the example above. 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 width that seems to have won the heart of most road riders is 25mm. The venerable sheldon brown has a gear calculator that uses a different method to determine wheel size.

If your computer asks for radius divide your result by 6 2832 to obtain that value. The rear wheel creeps on the road surface as you pedal and can skid during braking so it gives a less accurate readout. Brown contends it is important to ride aboard the bike when executing the roll out method to simulate riding conditions. Second place a tape measure on the ground.

First pump up the tires. 28mm tires are also becoming more common as they give you more comfort on rougher roads with minimal drawbacks. Since the effective tire size is affected by tread thickness tire pressure and rider weight the rolling circumference should be measured by rolling the bike with the rider aboard. Run the test on a paved surface.

The amount of weight that will be exerted on the tires does play a crucial role in how much pressure you will put on a tire. Road biking tire widths. 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 rim pi 3 14 to get the cimcuference. For example on my touring bike when not loaded and just my body weight and bike weigh calculated using 32 wide tires i use 45 psi front and 70 rear but if i add 55 pounds of gear for touring i now have to raise that psi to 60 f and 90 r.

The tire width that s right for you depends on the type of bike you re riding. 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. How to fit and size a road bike duration. A third type of tire size might appear on either a mountain or a road tire.

Some bike computers require you to input tire size in centimeters while others use millimeters. 700x25c indicates a tire with a 700mm outer diameter and a 25mm width. How to determine wheel size for a bike computer bikeblogger duration. A tire size you might see on a road bike.

It offers a good balance of comfort grip and speed.