Awhile back someone pointed out that the Vanagon speedometer has a three digit number inscribed on the face indicating the factory calibration. This number is the wheel revolutions per mile at which the speedometer reads accurately. I checked Reinhardt ('82 Westy Diesel) and found 820 on the speedometer. I checked the Tire Rack website and found the Yoko 356's 185/14C's do 808 rev/mile. I think this means my speedometer would read LOWER than my actual speed if I run these tires. Is that right? Then I checked my newly acquired '82 GL Diesel and found 805 on the speedometer. I was surprised to find such a different calibration number between the two vehicles. With this vehicle, I would expect the speedometer to read HIGHER (insignificant?) than actual speed with Yoko's. Neither of these vehicles have Yoko's, or are on the road (yet). I just wanted check my understanding of the relationship between the calibration number and the tires. Anybody have a different perspective on this? Maynard Southard OvO '79 '82 Westy Diesel "Reinhardt" '93 EV GL "Klinger" '00 Golf GLS TDI "WooHoo" '84 Jetta GL TD "Donor" '82 Vanagon GL Diesel {as-yet unnamed} |
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