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post #1 of 14 Old 03-12-2009, 09:20 PM Thread Starter
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Whats the best tire size for 20" rims

I currently have 20 x 8.5 rims on my 2008 Honda Accord EXL Sedan with 225/35/R20 tires. I wanted to know if this low of a tire isnt good for my rims? Should I get a tire with more sidewall? If so whats the best tire size for my set up, Im lowered on H&R springs. Any advice is appreciated.
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post #2 of 14 Old 03-12-2009, 09:33 PM
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245/35 would be better imo...thats what i have and the sidewall is pretty decent

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post #3 of 14 Old 03-13-2009, 11:10 AM
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245/35 would be better imo...thats what i have and the sidewall is pretty decent

The 35 is the sidewall height...........your 245 is the width......so your tires are wider than his, but have the same sidewall height.

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post #4 of 14 Old 03-13-2009, 01:22 PM
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Quote:
Originally Posted by mystick6 View Post
I currently have 20 x 8.5 rims on my 2008 Honda Accord EXL Sedan with 225/35/R20 tires.
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Originally Posted by lebomb View Post
The 35 is the sidewall height...........your 245 is the width......so your tires are wider than his, but have the same sidewall height.
The 225 is the width of the tire in mm. The 35 is not the sidewall height but the aspect ratio. For this tire the sidewall height is 35% of the width, so it is 78.75 mm or ~3.1 in. For the 245/35 tire the sidewall height is 85.75 mm or ~3.38 in, so it is just over a 3/4 inch wider and has a bit over a 1/4 inch taller sidewall.

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post #5 of 14 Old 03-13-2009, 06:40 PM
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The 225 is the width of the tire in mm. The 35 is not the sidewall height but the aspect ratio. For this tire the sidewall height is 35% of the width, so it is 78.75 mm or ~3.1 in. For the 245/35 tire the sidewall height is 85.75 mm or ~3.38 in, so it is just over a 3/4 inch wider and has a bit over a 1/4 inch taller sidewall.

That may be true, but he has to go up TWO tire widths to go up just 1/4 in side wall height. Is that what he wants to do? At the same width the 40s or 45s would have taller side wall for sure.

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post #6 of 14 Old 03-13-2009, 10:50 PM
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Quote:
Originally Posted by lebomb View Post
The 35 is the sidewall height...........your 245 is the width......so your tires are wider than his, but have the same sidewall height.
wow completely wrong...do your homework next time bud ....the narrower the tire the more its going to have to stretch to fit so its not going to be as tall either

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post #7 of 14 Old 03-13-2009, 11:00 PM
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Going to run 245/35/20

You need a little meat on the sidewall or you'll be sorry, plus these Accords have HUGE wheel wells

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post #8 of 14 Old 03-14-2009, 06:17 AM
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He wouldn't have any troubles with rubbing if he got a bigger sidewall like a 245/40 or 245/45?
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post #9 of 14 Old 03-14-2009, 06:23 AM
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wow completely wrong...do your homework next time bud ....the narrower the tire the more its going to have to stretch to fit so its not going to be as tall either
Ahhhhhhhhh............homework done!!!

Sidewall Aspect Ratio
Typically following the three digits identifying the tire's Section Width in millimeters is a two-digit number that identifies the tire's profile or aspect ratio.

P225/50R16 91S

The 50 indicates that this tire size's sidewall height (from rim to tread) is 50% of its section width. The measurement is the tire's section height, and also referred to as the tire's series, profile or aspect ratio. The higher the number, the taller the sidewall; the lower the number, the lower the sidewall. We know that this tire size's section width is 225mm and that its section height is 50% of 225mm. By converting the 225mm to inches (225 / 25.4 = 8.86") and multiplying it by 50% (.50) we confirm that this tire size results in a tire section height of 4.43". If this tire were a P225/70R16 size, our calculation would confirm that the size would result in a section height of 6.20", approximately a 1.8-inch taller sidewall.

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post #10 of 14 Old 03-14-2009, 08:47 AM
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Originally Posted by anth6ny View Post
He wouldn't have any troubles with rubbing if he got a bigger sidewall like a 245/40 or 245/45?
It probably wouldn't rub, but 245/40 would be two inches taller than stock and 245/45 would be three inches taller. His speedometer would be significantly off, about 7.2% with the 40 series and 10.7% with the 45 series.

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post #11 of 14 Old 03-14-2009, 01:08 PM
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Hey.......up sizers..........be sure to check your tire pressure. I found mine to be at 30psi all the way around. With low profile tires.............you need to be 40-45 psi or your sidewall will be on the pavement when driving. You will wear out your tires with the quickness. My tires say 51 psi max., so Im running 42psi all the way around.

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post #12 of 14 Old 03-19-2009, 12:39 PM
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Plug this formula into an Excel spreadsheet:

=(A1*A2)*2/25.4+A3

I use it all the time it will give you a real good idea on how big or small you can go.
As far as the 40 or 45 series, that would be a big ass monster truck tire on your Accord. You also may want to head over to www.1010tires.com and use their calculator.

http://www.1010tires.com/TireSizeCalculator.asp

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post #13 of 14 Old 03-19-2009, 12:53 PM
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As far as the 40 or 45 series, that would be a big ass monster truck tire on your Accord.

................. I think Im gonna have to disagree with this one.

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post #14 of 14 Old 03-19-2009, 02:05 PM
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I was being funny but here are the specs:
25.86 I4
26.33 V6
25.79 245/30/20 Tire Rack Reccomended
26.75 245/35/20 Discount Tire Reccomended
27.03 255/35/20
27.72 245/40/20
28.68 245/45/20 HUGE

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