> ...I have noticed that the odometer is also wrong
> is there a way to calculate (roughly) the difference
> in mileage? ...
> Jon Smith
First, calculate the actual mph:
Actual mph = (new tire diam./old tire diam.) X indicated mph
[pick an indicated mph, say 50 mph]
e.g. actual mph = (26/24) x 50 = 54.17
Then, use above to calculate the %age error of the speedometer:
% error = (actual mph - indicated mph)/actual mph x 100
e.g. % error = (54.17 - 50)/54.17 x 100 = 7.70
Now, say your trip odometer says you've gone 150 mi.
The actual miles travelled are 150 x 1.0770 = 161.55
Happy calculating.
Bob
Burlington, Ontario
'97 CC Sport, 5.2L, 3.55 auto., flame red
Gibson duals, KN drop-in
Coloured-keyed grille guard, running boards
and hard tonneau cover
Deflectors, grille insert
AR-211 15x7 rims (4.75" backspace)
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:11:01 EDT