Quote:
Originally Posted by Keith6987
68orangesunshine Thats good to Know. I wouldn't have thought the 2" difference in wheel width would make a difference.
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Sure surprised me. I had to take the '68 C/10 Stepside to work.
With a wider shoulder width, the tire profile does not stand as tall.
Conversly, the same dimensioned tire on the narrower rim gets taller.
I once got a verbal warning from a Highway Patrolman. Speed limit was 70. I'm clipping by in my Jimmy [which temporarily had the Suburban's tire set on all around] My speedo indicates 70 MPH. He's out of his car standing in the median, observing traffic on a lonesome stretch of I-10 -- between Tucson and Phoenix. Thinking I was doing no wrong, I gave the Trooper a friendly wave.
About a mile or 2 later, he pulls me over, and says I was speeding. We then used mathematical formulas based on my tires' radius to determine rate of speed. So the speedometer reads ''slow'' with larger diameter tires.
Because I had thought I was within the Speed Limit, and was not a jerk about it, he gave me a Verbal Warning to slow down.
Now I like to check my GPS for the more accurate ground speed, especially on the freeway.
