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Old 04-03-2020, 01:33 PM   #1
st1_ftw
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Member#: 513104
Join Date: Apr 2020
Chapter/Region: E. Canada
Location: Quebec
Vehicle:
2017 STI

Default Tire size and warranty

Iíve been thinking about changing my stock 245/40 r18 tires to 255/40 r18, on stock wheels. I know itís doable without any rubbing or other issues (except slighty off speedometer and worse mpg), up to 265/40. I think 265 would be too big and the sidewheel would bulge too much for my taste, but 255 would be perfect, slightly higher and larger than stock.
Now I know the manual states 245 and if I call my dealership, they will tell me to keep it stock. But does anyone ever had denied warranty claim because of non 100% stock tire size?
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Old 04-03-2020, 02:11 PM   #2
Patrick Olsen
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Location: Where the Navy sends me...
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1997 Legacy 2.5GT
1996 Impreza coupe

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Unless the oversized tires are obviously causing an issue (like rubbing a wiring harness in the fender well or something like that), I doubt most dealerships would even notice, let alone deny a warranty claim.

And I can't think of what sort of warranty claim would be denied due to non-stock tire sizing.
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Old 04-05-2020, 01:01 PM   #3
Steakboy
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Iíve got a 2013 WRX and was running 265/35/18 on 18x9.5 and stock is 17x8. As well had a cat back exhaust and fortune auto coil overs. I had my engine replaced under warranty, and throw out bearing under warranty. They gave me no hassle. So long as the wheels are not directly connected to the problem (rubbing, cv axles, maybe suspension, wheel bearings) Subaru wonít reject you.
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Old 04-08-2020, 09:11 PM   #4
st1_ftw
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Chapter/Region: E. Canada
Location: Quebec
Vehicle:
2017 STI

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My worries were exactly that: bearing, suspension, direction.. type of warranty work denied.

I've decided to stay stock to save the headaches. And also, I cannot find a single lateral photo of that size on stock wheels on the interwebz... Only from the side which looks good but cannot confirm 100% if they wouldnt bulge too much. I was planning the 255 for extra wideness from the back and more potholes protection, but oh well.. stock size looks pretty great anyway and no flat in my first year so far, knocking on wood..
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