speedo gear cannot be adjusted or replaced with a different size.

--
Charles Tague
93 Honda Civic DX HB
1.6L SOHC VTEC 14.85 @ 89 mph,1.98 60 ft.
With ZEX 85 hp ZEX 13.09 @ 103 mph, 1.81 60ft.
86 Pontiac Trans Am
225/50/15 GForce Drag Radials
305 peanut cammed 15.29 @ 88 mph
http://home.cinci.rr.com/mistab0ne/
"Tina Venne" <TinaVenne@comcast.net> wrote in message
news:8a59jvo8rhued647kduden8ocrs4m6fsbv@4ax.com...
> Can anyone tell me what the original size tires were from the factory
> on the 1987 Civic Si?
>
> If someone is good at math, can you tell me what the speed difference
> would be, as indicated on the speedometer, between this stock size and
> the currently installed P185-65-R15 at, say, 60mph?
>
> Also, where can one obtain the driven gear (or whatever it is called)
> that would correct the speedometer for the above current tire size?