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Tire Size and Speedo
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Tire Size and Speedo - July 24, 2013, 04:32 PM

I went from a 190/50 to a 190/55 on my Z1000. The there should be a 9.5 mm difference in height. I know this will have an impact on my speedo, but does anyone know how much? With the 190/50 I felt that the speedo was pretty accurate. I don't have a gps to compare with.


Today I was following a line of cars on a 55 mph road and I was showing 52, but I don't know if they were actually doing the limit.
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July 24, 2013, 04:35 PM

that's probably close. Keep in mind it's a %. so it might be dead on accurate @ 30mph and 6mph @70


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July 25, 2013, 04:37 PM

Larger tire = Lower indicated.

However, bikes are about 10% off in the negative in the first place, so it may just even you out. Best way to check is take a GPS with you. Or bring it here and I'll make sure it's on @50, 75 and 120mph.


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July 25, 2013, 08:28 PM

Good thing it reads off a crank sensor. That front wheel just starts touching down at your last mentioned speed.


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