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Our speedometer calibration calculator will get you the answer you are looking for. Enter your original tire size, your new tire size, and then play with the miles per hour to see how much faster you are going at different speeds.
Motorcycle speed and sprocket calculator with bike database for gearing, sprockets, tires and chains of over 1900 bikes. Request yours to be added as well.
If you changed the size of your tires but didn't re-calibrate your speedometer, you'll want to know how far off it is. Use this calculator to figure that out.
5 paź 2017 · ALWAYS use the exact tire size, type, speed and load rating recommended by the manufacturer of your motorcycle. Never try to second-guess the designers and engineers with regards to tire size, type, speed or load rating!
20 lip 2018 · A typical speed chart will show J or 62mph all the way to W which is 168mph. Now... sometimes we will see a ZR in the tire size and then a different Load Rating / Speed Index label to follow. This Z indicates a maximum sustained speed capability in excess of 149 mph and the 91W indicates a 168mph Maximum Top Speed.
Calculate how far off your speedometer is with your new tire size. This info will only approximate your corrected speed and depends on the accuracy of tire size diameters (assumimg nothing but tire size has changed).
The speed rating is based upon testing the tire on a drum to determine the maximum safe sustained speed capabilities of the tire. If there is no speed rating indicated, the tire has an “S” rating and there will be a “-” or an “x” after the width. See the chart below for the most common speed rating letter designations.
