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can you use a 275/40 tire on a stock 18x8.5" wheel?

Old 11-26-2018, 01:27 AM
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efs101
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Default can you use a 275/40 tire on a stock 18x8.5" wheel?

2008 350z roadster
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Old 11-26-2018, 06:22 AM
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MicVelo
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Originally Posted by efs101 View Post
2008 350z roadster
Can it be mounted? Yes.

Safely? No, it's pushing beyond the safe limit. Have to assume you want a size like that for "performance reasons". Performance and safety is compromised meaning it's not worth doing.
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Old 11-26-2018, 09:11 AM
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iideadeyeii
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I'm running a 275/40/18 on the factory 18x8 wheel for that past few years. Cornering is fine. The front 225's will chirp on corners and the rears never chirp. Honestly probably not worth the extra weight as I'm only around 300whp. I'd probably go 265's if I had to do it again just for weight reasons only.
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Old 11-26-2018, 04:23 PM
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Spike100
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I would not run a 275/40 tire on a stock 18x8.5" wheel. The sidewall (and possibly the car's handling) is adversely affected by this deviant wheel/tire-size combination. You should mount at least a 9.5" wide wheel if you are running a 275 mm wide tire.
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Old 11-27-2018, 10:15 AM
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I would do it with a slick or cheater slick for drag use, it something i would daily drive.
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