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walu
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Location:
Sydney
Registered:
December 2003
Re: do bigger tyres = slower or faster than actual speedo readings? Mon, 21 March 2005 20:07 Go to previous messageGo to previous message
You are right, the speedo is showing less than you are actually travelling - I believe by just over 6%. Essentially, the new tyres have a smaller circumference, so every turn of the 60 profile wheel, you travel about 1900mm, where on the 50 profile you travel about 1800mm.

The speedo is calibrated to believe it is travelling 1800mm per revolution, where you are now travelling 1900mm.


PS don't quote me on the maths

[Updated on: Mon, 21 March 2005 20:08]

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SubjectPosterDate
Read Message   do bigger tyres = slower or faster than actual speedo readings? WHITCHYMon, 21 March 2005 15:30
Read Message   Re: do bigger tyres = slower or faster than actual speedo readings?  waluMon, 21 March 2005 20:07
Read Message   Re: do bigger tyres = slower or faster than actual speedo readings? davedaveMon, 21 March 2005 21:48
Read Message   Re: do bigger tyres = slower or faster than actual speedo readings? joorshMon, 21 March 2005 22:48
Read Message   Re: do bigger tyres = slower or faster than actual speedo readings? davedaveMon, 21 March 2005 23:08
Read Message   Re: do bigger tyres = slower or faster than actual speedo readings? duff_boyTue, 22 March 2005 00:36
Read Message   Re: do bigger tyres = slower or faster than actual speedo readings? Corona RT142Tue, 22 March 2005 00:43
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