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So in another thread we were discussing the Oceans width and someone posted the press release dimensions. Included were tire sizes. They are as follows
255/50/R20
255/45/R22
This looked curious to me because they have very similar sidewall ratios for a 2 inch change in wheel size. So I put them into a tire size calculator and the 20" wheels have 5" of sidewall and an overall diameter of 30". The 22" have a sidewall of 4.5" and overall diameter of 31". The sidewall isn't that much different, and the larger wheels actually have a larger diameter. This must mean the speedos are calibrated differently. Is this common in cars for the wheels to actually have different diameters?
Now I'm wondering if the 20s will actually ride that much softer than 22 with minimal difference in sidewall and same width. Either way, I don't think I'll be looking to pony up to upgrade my Ultra to 22s.
255/50/R20
255/45/R22
This looked curious to me because they have very similar sidewall ratios for a 2 inch change in wheel size. So I put them into a tire size calculator and the 20" wheels have 5" of sidewall and an overall diameter of 30". The 22" have a sidewall of 4.5" and overall diameter of 31". The sidewall isn't that much different, and the larger wheels actually have a larger diameter. This must mean the speedos are calibrated differently. Is this common in cars for the wheels to actually have different diameters?
Now I'm wondering if the 20s will actually ride that much softer than 22 with minimal difference in sidewall and same width. Either way, I don't think I'll be looking to pony up to upgrade my Ultra to 22s.