www.sv2s.com

Trying to decide which size tire to install on the bug, I looked at a bunche vehicles (mostly bugs) to see how different tire sizes fit in them. Finally made up my mind but then I wondered how would they affect the speed & odometer reading. Using Discount Tire's website, found a cool feature where you enter the "current" tire size and the tire size you want to use, then it compares the 2 on sidewall height, section width, overall diameter, circumference, and revolutions per mile. It even calculates the difference in speed reading vs actual speed of the "new" tire.

Go to Tire Calculator and plug in your numbers. The difference in speed reading for my new tires is a mere -2.36mph so if it's reading 65mph I know it's actually going a bit slower than that.

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“The difference between a philanthropist and a liberal is that a philanthropist is generous with his own money.” Jack Kelly

Very interesting. I saw a similar site a couple of years ago but this one is much better.

In my case since I am now running rather tall 15s vs the stock 14s, my speedometer is reading 12% low. 65 mph indicated is actually 73. Makes my normal cruising speed of 55 indicated actually mean I'm going 62.

This also means my odometer is running 12% slow. So my mpg computed on the odometer is actually lower than reality.

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Larry in OB
1969 Westfalia and 2002 Eurovan Camper
A strong and independent media is not the enemy. Its is a bulwark of our democracy.
SV2s Member #401

I'm liking the look of these bad boys!! General Grabber AT/2's, 27-8.50-14

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'66 Standard Microbus [o\@/o]
SV2s Member #81
SBNB #2

There!

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“The difference between a philanthropist and a liberal is that a philanthropist is generous with his own money.” Jack Kelly