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Subject:Re: odometer tires speed error
From:Horace K. Sawyer
Date:Sun, 18 Apr 1999 07:03:59 -0400

Conversion to 15" rims and 205/75/15 Bridgestone 689 LT  on  91 auto Westy.
These measure just under 27" diameter as best can tell.

Speedometer appears to be reading lower than actual speed.

Question is:  how much?