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-   -   120/70 front tyres (http://forums.sv650.org/showthread.php?t=100118)

Lozzo 12-11-07 11:48 PM
120/70 front tyres
 
This weekend I had new Diablo Stradas fitted and decided to go with a 120/70 front after riding my exes bike which has the same sizes as mine now has, only she has normal Diablos. I like the feel of it in corners but have noticed that the speedo now reads slower (and when I stoppie the front tyre just catches the nice shiny rad guard I just fitted to the SV1000 rad my 650 has...b**gger).

I'm no mathematician, not by any means, so how far out is it compared to what it was before?

weazelz 12-11-07 11:59 PM
Re: 120/70 front tyres
 
Quote:
Originally Posted by Lozzo (Post 1338962)
This weekend I had new Diablo Stradas fitted and decided to go with a 120/70 front after riding my exes bike which has the same sizes as mine now has, only she has normal Diablos. I like the feel of it in corners but have noticed that the speedo now reads slower (and when I stoppie the front tyre just catches the nice shiny rad guard I just fitted to the SV1000 rad my 650 has...b**gger).

I'm no mathematician, not by any means, so how far out is it compared to what it was before?
120mm x (70-60)% = 12mm difference in the height of the tyre

12mm / (120X0.7 + 17x25.4/2 ) = ~4% difference in radius/diameter/circumference

so your speed will read ~57mph where it would previously have read 60mph, for example


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