That would be awesome...more accurat speedometer won´t hurt at all, very nice to have.Here also ! Please let a tyre specialist tell us all about it please :dunno:
I found a calculation tool but I am unsure what the outcome means (usable tyre or not ? the difference of the rear wheel would be 3.3%
Here is the link and see image below for the calculation made Tire size calculator
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And a little harsher ride :Thumbdown: but it will also look betterThanks for your input Ranger! I actually have a Tire Comparer app on my phone that helps me with this one, so the numbers on my earlier post seem to be just fine, the app works as it should![]()
It blows that they haven´t done´them in stock size, but going with 265 front/295 rear will give the car even more grip.
Great information Ranger - thanks for that! So, if the car has been lowered (H&R Springs), would there be a chance of running into issues with these sizes? May not be able to answer that, but just wondering.Stock tires front: 255/40/19 = 27.03"
Alternative front: 265/35/19 = 26.30"
Stock tires rear : 285/35/19 = 26.85"
Alternative rear : 295/30/19 = 25.96"
Rolling diameters are shorter and much shorter for the rears which will not be as significant in relevence to affecting ABS and speedometer accuracy. With shorter rolling diameters your topend speed will be compromised a bit and low end picked up a bit. This can be considered a "poor man's" diff. ratio change.
Equation used to calculate rolling diameter: tread width x sidewall profile diveded by 25.4 x 2 + rim diameter = rolling diameter.
ex. 255 / 40 / 19
255 x .4= 102 then divide by 25.4(to convert mm to inches)= 4.01, then multiply by 2(upper & lower sidewalls)= 8.03, then add 19(rim diameter in inches) = 27.03 inch rolling diameter.
Hope this makes sense.
Ranger