Gary Lewis Posted April 2, 2019 Share Posted April 2, 2019 I am a "just in case" guy, so I ordered a set of 5 gears. They arrived today and i installed the yellow (18 teeth) one as per the calculator. Lower speeds were fairly close but it was still up to 5km out in the higher speeds. Since I had more to try, I installed the pink (19 teeth) gear. Now its "bang on"... at least according to my Garmin GPS. 0-100km is all reading accurately. The tires on my truck have a very deep tread. This may contribute to requiring the 19 tooth gear instead of the 18 tooth gear. I should have gone to the tire manufacturer website for the revolutions per mile. This may have made the difference. This is another "layer of the onion" that I may have peeled, but I don't think it will ever end, lol. I have the remaining gears for sale if anyone requires except the pink (for changing tire size, etc) Shipping from Canada. Congrat's! I like the idea of a pack of gears, letting you try several. But I think you are right about the tread. Obviously yours is effectively taller than other tires that size. Link to comment Share on other sites More sharing options...
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