Has anyone tried putting 45 series tires (245/45R20 and 265/45R20) on the 20in rims instead of the OEM 40 series tires (245/40R20 and 265/40R20)?
The 45 series tires would be about 1" taller and run ~3% faster, or ~2mph at 70mph.
So speed would actually be more accurate (seems the Air speedo is known to run fast) and the front/rear diameter ratio is practically identical to OEM.
Highly doubt if there are any fitment issues with the marginal size difference (effectively 0.5" in the wheel well).
Benefits would include the usual improved ride quality and impact resistance/load rating.
The tire choices are also a bit wider. The Michelin Cross Climate is available in 45 series for those who need an all weather option. That 265/40R20 tire is pretty limited.
Downsides could include warranty invalidation and damaging the car, unless this is proven to work and somehow blessed by corporate.
Also wonder who would be willing to install these non-OEM tire sizes.
As I said, terrible idea, but....
The 45 series tires would be about 1" taller and run ~3% faster, or ~2mph at 70mph.
So speed would actually be more accurate (seems the Air speedo is known to run fast) and the front/rear diameter ratio is practically identical to OEM.
Highly doubt if there are any fitment issues with the marginal size difference (effectively 0.5" in the wheel well).
Benefits would include the usual improved ride quality and impact resistance/load rating.
The tire choices are also a bit wider. The Michelin Cross Climate is available in 45 series for those who need an all weather option. That 265/40R20 tire is pretty limited.
Downsides could include warranty invalidation and damaging the car, unless this is proven to work and somehow blessed by corporate.
Also wonder who would be willing to install these non-OEM tire sizes.
As I said, terrible idea, but....
