etrto standards and databooks for tire size

Setting the bike computer with wheel circumference table (ETRTO table) It is quick and easy and the results are the most accurate. Conclusion on the method (measure wheel circumference with tire rotation)įor setting the bike computer, use this method. With this you can check the correct setting and check whether the bike speedometer setting was successful. Your bike computer is set up correctly? It is best to drive a precisely measured route. In this short video the method is explained very understandably: Repeat the method a few times to get the most accurate result. The distance travelled is the wheel circumference in millimetres Measure the distance travelled with a folding rule.Until the marking on the bicycle tire points exactly downwards again. Alternatively, you can also use the bicycle valve as a marker. At the point where the wheel points exactly downwards, make a mark on the bike casing and on the ground e.g.By measuring you directly determine the tire circumference: Measure wheel circumference with tire rotation If you already have a folding rule at hand, measure the tire circumference (next method). The wheel circumference calculation method is relatively inaccurate. ✅ Method includes the own wheel circumference Bad ✅ Easy and quick way, to determine the wheel circumference and adjust for the bike speedometer. The determined radius in mm into the formula U = 2 * pi * r.Ĭonclusion on the method (calculate wheel circumference with formula).Using a folding rule, measure the radius from the bicycle tire.The radius of the bicycle tire is measured from the outermost point of the casing to the center of the axle. With the formula U = 2 * pi * r (where the circle number pi = 3.14) you then calculate the wheel circumference. The quick method for setting the bike speedometer! This method involves measuring the bicycle tire: The radius of the bicycle tire is determined with a folding rule. Calculate wheel circumference with formula With this method your weight and also the tire condition including air pressure are included. The result with the bike computer correctly set here will be the most correct. I recommend you method 2 “Measure wheel circumference with tire rotation”. For this I will show 3 possibilities and you will learn the advantages and disadvantages of the methods. If your bike computer is mounted correctly, you can now set up the bike computer properly. One or more cable ties will then hold the sensor securely in place. After a certain time, the rubber can then unfortunately become brittle. In the beginning, this usually works quite well. Most of the time, the bike computer sensor is held in place with one or more rubber bands. Tip: Cable ties are very helpful during assembly.

Etrto standards and databooks for tire size