Quote:
Originally Posted by racingbmwm3
I would think the smaller wheels and tires would effectively reduce the moment of inertia thus reducing the stress on the system (less rotating mass).
Comparing stock 20" tires vs winter 18", on tire rack, the winter tires are actually 0.3" larger, so drivetrain would actually run slightly slower, not higher.
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I am fine using your point of view, it doesn't matter.
I don't know if there is additional stress on the gear or how much it would take to strip out the gear if there was. It was just a scenario to suggest how it might not be a coincidence. I don't have enough information to know what is fact.
My guess is mass moment of inertia is insignificant but I don't have enough info to know that for sure either.
The diameter of the tires could be smaller. I don't know because I don't know if OP has snow tires and if he does if they are Tire Rack recommendation. What I would need are the diameters of the summer and winter tires.
The input OP was interested in--should he flip the gear or install the new one?