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How are tire circumferences calculated? Assuming you've already read our article about tyre sizes, it's measured in millimeters and can be calculated from the diameter of the driven wheel. Tire circumferences can be calculated from the following formula, where TT stands for tire thickness, RD for rim diameter, and TC for tire circumference.
14 kwi 2024 · Calculate the tire circumference. A simple and quick way to determine the tire circumference is to calculate it using the tire diameter. Required tools: Measuring tape and calculator. Step 1: Measure the diameter of the tire. The following graphic shows what is meant by the diameter:
5 kwi 2023 · How do I determine the diameter of my bicycle tire? To determine the tire diameter, you can measure the distance from one edge of the tire’s rim to the opposite edge, passing through the center of the tire. Make sure to measure in millimeters or inches, depending on the units you need or prefer.
To use the below chart, simply locate the tire size using the first or second column, then enter the circumference (in mm) in the appropriate field in the bicycle computer's or mobile device software's settings.
That’s how the diameter and circumference (circ – equals distance rolled in one turn of the wheel) are calculated in the Tyre size table. These figures are useful for setting your cycle-computer and precisely calculating gears.
Method 1 - Diameter of Wheel Multiplied By Pi. This method involves calculations you’ll probably want to use a calculator for. Measure the radius of your bicycle wheel, from the lowest point of tire contact with the floor to the centre of your wheel skewer or thru-axle.
The calculator is based on the ISO/ETRTO tire size standards. This specification defines tire size as a tire width and rim circumference in millimeters (mm). For example, an ISO tire size of 28-622 refers to a 700 x 28C tire, which has a tire width of 28 mm and a rim diameter of 622 mm.
