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Hi, I recently purchased 18x8 '15 Accord Sport Wheels for my 2004 Accord Coupe. Should I go with 225/45/18 tires or 235/45/18 tires ? Pictures of both will be greatly appreciated. Some people are saying it's just right some are saying get 225 cause 235 looks too beefy. I don't like they stretched look personally so what should I go with?
 

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Just a few things to note. Personal preference is going to play a factor in this, but also keep in mind the physical difference between a 225/45R18 and a 235/45R18 is the 235' is 3/8" taller in overall rolling diameter and 3/8" wider. The thing to consider is the potential differences in tire manufacturers, because of how close these sizes are theoretically you could have a 225/45R18 in 1 brand and a 235/45R18 in another and they could be very close if not the same size, this is due to manufacturing tolerances when tires are built.

Regarding your stretch concern, an 8 inch wide wheel would be a great fitment for either tire choice.
 

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I put OEM 8th Gen 18x8's on my car. I didn't get tires with them, so I too had to decide between the OEM 8th Gen size (235/45R18) and a custom size. 225/45R18 seemed to be that option.

I ended up choosing 225/45R18 for the following reasons:
-follows +1 sizing theory for 7th Gen tire sizes (205/60R16, 215/50R17, 225/45R18)
-closer outer diameter to my stock 16's
-lighter than 235's

The above two facts contribute to the following reasons:
-lower impact on fuel economy
-lower impact on acceleration and braking

And finally,
-less speedometer error
-lower cost than 235's

The only area where 225's were at a disadvantage to 235's was ride comfort. That's because the tires I was looking at only came in an XL load rating (reinforced sidewall) vs the 235's with a standard load rating. But that might not be the case with the tires you pick.

I too was worried about 225's being stretched on the 18x8's, but that wasn't the case. They fit square, and the tire sticks past the edge of the wheel.

Here's a pic of my setup:
 
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