Speedo gear, which one?
06-05-2004, 09:38 AM
#41
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Re: Speedo gear, which one?
A measured 'mile' is a good way to check it for sure. They are just
hard to find in most places.
Mike
TW wrote:
>
> Mike, thanks. I don't have a GPS, yet. But I have actually timed myself
> against mile markers on the motorway (or should that be a kilometer marker,
> we are metric in NZ!). I did five kilometers in exactly three minutes,
> which gives me a physical speed of 100 kms/hour. My speedo, however, was
> saying I was doing 90 kms/hour all along. My circumference on the tyres
> has increased by about 10 percent, so the difference in the actual versus
> indicated speed seems to be maintaining a similar relationship.
>
> TW
> --
> 01 TJ Renegade 4.0L Auto
> D30/44, 265/75R16 BFG Muds
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:40C0FC3E.52F52CAF@sympatico.ca...
> > Before I spent money and time on a new gear, I would take a GPS unit and
> > verify my 'real' speed.
> >
> > I went one size over the factory largest tire on my Cherokee and my
> > speedometer 'then' became exactly right on.
> >
> > When I put 33's on my CJ7, the speedometer became correct, so things
> > vary...
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
hard to find in most places.
Mike
TW wrote:
>
> Mike, thanks. I don't have a GPS, yet. But I have actually timed myself
> against mile markers on the motorway (or should that be a kilometer marker,
> we are metric in NZ!). I did five kilometers in exactly three minutes,
> which gives me a physical speed of 100 kms/hour. My speedo, however, was
> saying I was doing 90 kms/hour all along. My circumference on the tyres
> has increased by about 10 percent, so the difference in the actual versus
> indicated speed seems to be maintaining a similar relationship.
>
> TW
> --
> 01 TJ Renegade 4.0L Auto
> D30/44, 265/75R16 BFG Muds
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:40C0FC3E.52F52CAF@sympatico.ca...
> > Before I spent money and time on a new gear, I would take a GPS unit and
> > verify my 'real' speed.
> >
> > I went one size over the factory largest tire on my Cherokee and my
> > speedometer 'then' became exactly right on.
> >
> > When I put 33's on my CJ7, the speedometer became correct, so things
> > vary...
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
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