Correct Tire Size for 20" Wheels
03-26-2007, 09:31 AM
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And the wheels could be for your first tyre option:
F 8.5 x 20 ET15 and R10 x 20 ET20
F 8.5 x 20 ET15 and R10 x 20 ET20
03-26-2007, 10:46 AM
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the more correct option in terms of keeping the rolling dia and radius as close to stock as possible would be option 2 (285/25 or 295/25 on the rear), only problem being it doesn't leave much rubber on the rim and the 295's can throw up catching issues.
The first option is a theoretical oversizing of nearly an inch on the wheel dia, but works perfectly fine, is much cheaper and leaves more rubber on the rim. Also the tyres of option 1 usually have a higher load index. In theory the difference to stock would be between 3 and 4%, but in practice it all is a little more relative. Different tyre manufacturers have different overall tyre widths, although they all carry the same markings.
I also use option 1 and my speedo should be out more theoretically than it is in reality. Further the slight oversizing fills the arches nicer and reduces the visual necessity of dropping the suspension
The first option is a theoretical oversizing of nearly an inch on the wheel dia, but works perfectly fine, is much cheaper and leaves more rubber on the rim. Also the tyres of option 1 usually have a higher load index. In theory the difference to stock would be between 3 and 4%, but in practice it all is a little more relative. Different tyre manufacturers have different overall tyre widths, although they all carry the same markings.
I also use option 1 and my speedo should be out more theoretically than it is in reality. Further the slight oversizing fills the arches nicer and reduces the visual necessity of dropping the suspension
03-26-2007, 11:45 AM
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Originally Posted by olli_535d' post='407191' date='Mar 26 2007, 01:46 PM
the more correct option in terms of keeping the rolling dia and radius as close to stock as possible would be option 2 (285/25 or 295/25 on the rear), only problem being it doesn't leave much rubber on the rim and the 295's can throw up catching issues.
The first option is a theoretical oversizing of nearly an inch on the wheel dia, but works perfectly fine, is much cheaper and leaves more rubber on the rim. Also the tyres of option 1 usually have a higher load index. In theory the difference to stock would be between 3 and 4%, but in practice it all is a little more relative. Different tyre manufacturers have different overall tyre widths, although they all carry the same markings.
I also use option 1 and my speedo should be out more theoretically than it is in reality. Further the slight oversizing fills the arches nicer and reduces the visual necessity of dropping the suspension
The first option is a theoretical oversizing of nearly an inch on the wheel dia, but works perfectly fine, is much cheaper and leaves more rubber on the rim. Also the tyres of option 1 usually have a higher load index. In theory the difference to stock would be between 3 and 4%, but in practice it all is a little more relative. Different tyre manufacturers have different overall tyre widths, although they all carry the same markings.
I also use option 1 and my speedo should be out more theoretically than it is in reality. Further the slight oversizing fills the arches nicer and reduces the visual necessity of dropping the suspension
Thanks for the great information. I'll go with option 1.
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