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Tire Sizing for my new rims

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Old 09-22-2005, 10:20 AM
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USMC-Z
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Default Tire Sizing for my new rims

I just purchased some Ruff Racing 278 rims and now I need to wrap them in something. I saw some falkens on discount tire direct but they ony have 245 35 19 in the fronts and 275 30 19 in the back. Can I run a 35 and 30 together or will the setting look off? Specs of the wheel are below:

Size:: 19x8.5 & 19x9.5
Offset:: 20mm front, 20mm rear

I'm trying to make sure that the sidewall is thin and the tire fits around the whole rim without any distortion. Thanks for any help!
Attached Thumbnails Tire Sizing for my new rims-278s3.jpg  
Old 09-22-2005, 10:58 AM
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Chris@DTD
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I'd recommend the 245/275-35 combo. With the 30 series, the front tire is taller.
Old 09-22-2005, 11:07 AM
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Alberto
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Originally Posted by Chris@DTD
I'd recommend the 245/275-35 combo. With the 30 series, the front tire is taller.
+1 those are perfect sizes for thos rims....
Old 09-22-2005, 12:18 PM
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Ok, sounds good. What would going from 275 to 285 change? Also, Chris@DTD, could you get me a deal on these tires? I will be purchasing within the next 1-2 weeks. Thanks!
Old 09-22-2005, 01:49 PM
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Badmonkey
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Originally Posted by krnlikewh0a
Ok, sounds good. What would going from 275 to 285 change? Also, Chris@DTD, could you get me a deal on these tires? I will be purchasing within the next 1-2 weeks. Thanks!
275 is the tire width in mm, so, 285 is 10mm wider. The 35 is an aspect ratio. So, 35% of the width = the sidewall height.

275/35/19 = 26.6" Tire diameter.
285/35/19 = 26.9" Tire diameter.

245/45/18 = 26.7" Stock diameter.
Old 09-22-2005, 02:00 PM
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Ahh, i get it now. Thanks for clearing that up for me
Old 09-23-2005, 02:02 PM
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I see that the prices for a 235 over a 245 in the front is much cheaper. Will this really change ride quality/looks/steering? If the changes are small, I might just go with the 235.
Old 09-23-2005, 02:47 PM
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235 on a 8.5" wheel sounds too skinny. It might stretch the sidewall and look funny, also that is a 40mm difference between front and rear width, it may affect your handling. Keep in mind that if you have VDC, you need to keep the computer happy with the sizes. Your front and rear diameters must be within the VDC parameters. Your rear wheel must be about 1/2" larger in diameter.
Old 09-23-2005, 02:48 PM
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Just go with the 245, it can't be that much more.
Old 09-23-2005, 02:53 PM
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on tire rack i think it was a 200 difference if I bought 2. I think i'll just stick with the 245. Ahhh, I just called another company and they said for me to run a 275 30 19 in the back instead of a 35. They claimed that the back tire sidewall would be higher if I used a 275 35 19 with 245 35 19 in the front. This sounds incorrect to me as everyone else has said otherwise. Is this claim correct?
Old 09-23-2005, 03:18 PM
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The rear HAS to be higher than the front. Get the 275/35 and the 245/35 tires. I would find other sources for tires if it is really a $100/tire difference going up one size. Find out exactly the brand and tell the tire place what you want, don't let somebody who has no idea about our cars tell you any different.
Old 09-23-2005, 03:47 PM
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Originally Posted by Badmonkey
The rear HAS to be higher than the front. Get the 275/35 and the 245/35 tires. I would find other sources for tires if it is really a $100/tire difference going up one size. Find out exactly the brand and tell the tire place what you want, don't let somebody who has no idea about our cars tell you any different.
Right on!
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