Hello,
I just got a 2012 Outlander GT 4WD, stock tire size is 225/55R18
My 2006 Ford Freestyle, which just completely died, has tire size 225/60R18.

I'd like to trade the tires over as the ones on the Ford are basically brand new, and the ones on the Outlander are much more worn.

Would there be any issue with size I put the 225/60R18's on the Outlander?

I've tried to research as best I could but have only confused myself more. Can anyone help? Thanks so much.

 

The only issue that I can tell is that your speedometer and odometer would be understated by a few % since the diameters of the wheels differ by that much. Someone can correct me if I'm wrong, but I believe the diameter calc is wheel size (18 in) + tire width (225mm) x tire profile (55%). Your original tire is 457mm+124mm = 581mm. Replacement tire is 457mm+135mm = 592mm. The difference in diameter is 11mm or 1.9%. However, the real variance is the circumference of the tire which is everything times pi. But since both tire sizes are multiplied by pi, the 1.9% variance is the same. You would be understating your speed and distance driven by 1.9%. From accepted norms, this is within the 3% range to avoid needing to make any adjustments to your speedo/odo.

No offense if someone finds an error in my math, but it should be fine to replace those tires. One other note, since this is an AWD, and I have no idea what a Ford Freestyle is, you need to make sure the tread is roughly the same on all 4 tires and that the tires are all the same. If you don't, you could damage your AWD drivetrain. Thanks for making me do some math, I needed the exercise.

 

WOW! What an amazingly concise answer. Thank you so much. I can't begin to understand how you "math people" wrap your brains around this stuff

 

I always put slightly bigger tires on mine for three reasons:

1) it protects the rims a bit better against curbs
2) the next size up is much more available and therefore way more affordable
3) at least in my mind, I think they look better, but really how I could see the difference in a few millimeters is probably, again, just in my perception

 

All good reasons, especially #2. However, most of what you're talking about has to do with the width of the tire (the 225 part). As long as the diameter of the overall wheel/tire is matched, there won't be any "mechanical" complications. Just as an FYI, it's good to do the overall diameter calculation to make sure you're within a few % of the factory wheel/tire size, of course, only if you care about the speedo/odo readings.

The difference in "a few mm" is noticeable, so you aren't crazy. Something else I've noticed is that different manufacturers thickness seem to appear different than others. I've seen 2 same size widths from different companies, but one clearly looked more stretched than the other. Just some thoughts if anyone cares.

 

i think the size 225/55R18 its good.. but you can check it here Mitsubishi Outlander tire size for all wheels front and rear axles 2003-2018 | Cars Tire Size ? Dimensions For All Wheels Front and Rear Axles .