2017~2022 Big tires?

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2017 Mazda CX-5 GT, 2016 Mazda6 iGT, 2014 Mazda3 sGT hatchback
I think you can safely go up to 235/55R19 (stock tire is 225/55R19), which is wider by 1cm.
Overall diameter will be larger by 0.4".
Or, 255/50R19.. which is only 0.3" larger in diameter.
(diameters vary a little based on diff brands, +/- 0.1")

For 255, you might want to make sure there will be no rubbing against the wheel walls when it is fully turned.
 

yrwei52

2016 Mazda CX-5 GT AWD w/Tech Pkg
Contributor
:
Plano, Texas, USA
For 255, you might want to make sure there will be no rubbing against the wheel walls when it is fully turned.
Don’t need 255, my 225/55R19 stock Toyo A23 will rub the front struts:

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