225/55r19 to 255/55r19?

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Asking the same question. It's a 4.5% diameter increase, so would it fit inside the wheel arches while turning without touching?
My wheel arch size is 860mm (33.85") and the 255's are 763mm (30") so about 50mm (2") gap each side.
From experience with a similar size jump on a truck here, expect about 15% increase in fuel consumption.
 
2021 CX-5

Is it even possible?

Yes I searched...didn't really find any answers though.
My stock Toyo A23 225/55R19 tires had left the rubbing mark on the front struts of my 2016 CX-5 GT AWD. Do you really think using much wider 255/55R19 tires is fine for our CX-5?

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My stock Toyo A23 225/55R19 tires had left the rubbing mark on the front struts of my 2016 CX-5 GT AWD. Do you really think using much wider 255/55R19 tires is fine for our CX-5?
The stock tyres should never rub on the strut. Mine has a 22mm (0.86") gap between the sidewall and the strut so can never rub. Maybe something else got caught there and caused the rubbing mark?

The 255's are wider by 30mm (1.18") so *should* clear the strut by 5mm, not much but maybe that's all it needs.
 
The stock tyres should never rub on the strut. Mine has a 22mm (0.86") gap between the sidewall and the strut so can never rub. Maybe something else got caught there and caused the rubbing mark?

The 255's are wider by 30mm (1.18") so *should* clear the strut by 5mm, not much but maybe that's all it needs.
The rubbing mark is on both sides of front struts. I was surprised when I saw these marks during tire rotation. But the picture is the proof rubbing does happen at front in certain situations with stock 225/55R19 tires.
 
Take your cellphone and snap a picture of the space between the inner wheel and the strut. That's what I did to determine if I had enough clearance to replace my OEM 255/50 20x8.5", +45 offset wheels with 285/35 22x10.5" wide +30 offset wheels.

OEM clearance:
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Aftermarket clearance:
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No visible rubbing marks or other indications of the tire making contact with any of the surrounding components on both setups. And I've hit plenty of potholes, even one large enough to put a mild dent in one of the wheels. I'd guess that if you parked it a certain way, it's more likely to force the tire inward, which could result in some rubbing. Examples:

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@BMGD, it will likely clear just fine when rolling straight, but as mentioned above, you may have some contact in certain situations. I personally think 5mm is cutting it too close, but YMMV.
 
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