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The Tire Rack's Tire & Wheel Forum
Use this forum to discuss anything in relation to wheels to tires to offsets. Sponsored by The Tire Rack |
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08-15-2009, 09:46 AM
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#1 |
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Registered User
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Question on Tire Size
My car has 205 x 50 as its OEM size. When I check Tire Rack or Discount Tire for optional sizes in 17 inch tires, they both move down to 45 sidewalls. I would like a wider tire but still would like to keep the 50 sidewall for added protection from our lousy Indiana roads. Is there a reason that you should not get 225 x 50 tires for my car?
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08-15-2009, 11:30 AM
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#2 |
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Registered User
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205 x 50 is usually what comes on the factory 16" wheels, is that what you have?
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08-15-2009, 01:43 PM
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#3 |
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Registered User
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The reason why the profile decreases to a 45 with a 225 is because you need to decrease the aspect ratio to maintain the same overall rolling diameter so that you're speedometer will be accurate.
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-Chris  
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08-15-2009, 01:50 PM
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#4 |
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Registered User
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Like what Chris said, a wider tire with a lower aspect ratio will give the same sidewall height. It's a ratio of the width, not a set sidewall height.
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Go ahead, ask me a question... Check out the CopTalk thread in the California forum Thank you Sam 
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08-15-2009, 11:03 PM
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#5 |
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Registered User
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Thanks for the info. I have 17 inch wheels, but it appears from what you are telling me I will need to go with the 45 sidewalls to get a wider tire in the 17 inch size.
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08-16-2009, 11:43 PM
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#6 | |
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Registered User
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Quote:
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harry
 VMR VB3 | 19x9.5 et30 | 19x10 et38 | 235/35's |
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08-17-2009, 11:31 AM
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#7 |
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Registered User
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the correct 17 inch size is actually 225/45/17 and it has exactly the same sidewall as 205/50/17
Here is a good tool for calculating sizes - http://www.miata.net/garage/tirecalc.html |
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08-17-2009, 12:01 PM
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#8 |
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Registered User
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225/45/17
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-Chris
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08-17-2009, 02:26 PM
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#9 |
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Registered User
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Thanks guys, that's what I will get with these wheels.
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08-17-2009, 05:37 PM
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#10 | |
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Registered User
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Quote:
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harry
VMR VB3 | 19x9.5 et30 | 19x10 et38 | 235/35's |
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08-17-2009, 07:01 PM
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#11 |
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Registered User
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What kind of upgrade? I would think weight would start to become a real issue with a tire this wide.
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08-17-2009, 08:20 PM
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#12 |
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Registered User
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Upgrade as in wider tire for a little more grip and a little better look. Weight won't become a big issue. But as they said above 225/45/17 is the correct size because it is OEM recommended, but 235's won't hurt a thing.
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harry
VMR VB3 | 19x9.5 et30 | 19x10 et38 | 235/35's |
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08-18-2009, 04:05 PM
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#13 | |
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Moderator
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Quote:
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Refer to 'Gary/E46Fanatics' as your previous contact when you order online. Credit E46Fanatics.com by ordering through the sig link. Click sig! --> 
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