Running 19.5" wheels; what about the spare?
I've got a set of Rickson 19.5" wheels recently and currently shopping for tires. In the meantime, I've been reading up about the 19.5" option and it would seem Rickson's website does not find having...
Forum Discussion
Kayteg1 wrote:skipro3 wrote:
Best method is to take the tire, mark a spot and roll it one revolution, then compare to the other tire's distance it rolls in one revolution. For better accuracy, roll for several revolutions, then divide by that number for the average.
Why invent the wheel again and do it with errors?
Low speed rpm are different than rpm at 60 mph.
That is why manufacturers list rpm at set speed.
Of course RPM's are different low speed than at 60mph. That is the definition of RPMs; More and you are going faster, less and you are going slower.
Perhaps you mean distance covered per revolution? Depending on the wear of the tire and the spare, the factory specs may not be accurate. Check the actual distance covered on one revolution and compare with the other tire for accuracy and accounting for tire wear, inflation pressure.
