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post #1 of 12 (permalink) Old 12-05-2009, 11:27 AM Thread Starter
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Help W/ Tire Size

I got some new rims for the balt and was wondering what size tires i need i have heard two different sizes and just wanted to know which one. I have 20 inch wheels and have heard that 225/35/20 and 225/30/20 will both fit but i dont wanna have any issues w/ rubbing. Currently i'm lowered on eibach sportlines, soon to be bagged so if that helps. Im looking for any info thanks.

I know that large wheels are not widely accepted here but please don't leave comments that "they are to big" or "not my style" or such. To each their own
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post #2 of 12 (permalink) Old 12-05-2009, 11:36 AM
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I honestly don't know man....I honestly like a little bit of meat on my tires so i would go with 35 if they would fit. you know what i mean.




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post #3 of 12 (permalink) Old 12-05-2009, 11:43 AM
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try this

Tire size calculator


I would go 30s if youre gonna bag it. 20s are huuuugge
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post #4 of 12 (permalink) Old 12-05-2009, 03:43 PM
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stretch the tires please lol

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post #5 of 12 (permalink) Old 12-05-2009, 04:48 PM
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yeah I agree with drift. Plus it looks super cool! Haha

2006 LS coupe, tint, 18'' DR9 wheels, Eibach Sportlines, 12'' rockford sub w/600w rockford comp amp, alarm and so much more to come.
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post #6 of 12 (permalink) Old 12-07-2009, 04:15 AM
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if you're going to do it, do it right...


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post #7 of 12 (permalink) Old 12-07-2009, 04:20 AM
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alek come on man...lol




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post #8 of 12 (permalink) Old 12-07-2009, 05:02 AM
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My bad, couldn't resist... but yeah agreed with gCobalt05 on the site. Check that vs your current stock tire to see how much the difference between 30 and 35 will throw off your speedo, won't be a lot but check it out.

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post #9 of 12 (permalink) Old 12-07-2009, 05:17 AM
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there is a formula to figure out the speedo thing. car came with 17's i assume? measure it in mm to figure out the height of the aspect ratio (side wall). so every inch is 25.4mm, you have a 431.8mm wheel. the 20" wheel is 508mm. now you have to add the tire size to see what is going to get you closest overall diameter to the 17" with stock tires. for example, a 225/40/r20 is going to get you this: 225 x .40= 90mm. 90mm is the height of your side wall. add that to your 17" wheel 90 + 431.8 and you have 521.8.
so your wheel now from tread to tread has an overall diameter of 521.8

add your 90mm sidewall to 508mm and you get 598mm. that's a huge freakin' wheel! so you will have to try a different aspect ratio. 225/30/r20 is like a rubber band but we'll give it a shot just for theory. 225 x .30 = 67.5 add that to 508 you have an overall diameter of 575.5
get where I'm going here?
using a tire with a low aspect ratio is going to be a bumpy ride.

as far as the rubbing thing, you'll most likely need to modify your inner fender linings. if you're bagging it, you won't be able to drive it deflated anyway because the cv joints won't be able to handle the angle. I'd say you're pretty safe with 20's, it's been done plenty of times.

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post #10 of 12 (permalink) Old 12-08-2009, 09:07 PM Thread Starter
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Thank you all for your help after much deliberation i have decided to order the 225/30/20 tires should be here this week. Again thank you to all who posted it was a BIG help. I'll post some pics up when i get em on .....damn NY winters might be awhile
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