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Another Tire Question......

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Old 09-19-2009, 11:15 AM
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I've noticed that alot of people seem to be running the 35 series up front and the 30 in the rear, or 30, 25 respectively. I too, ended up going this route when I ordered my tires a few days ago (they should be here on Monday!) but I realized that I never asked why this is common practice. Could you please offer a little insight?

Thanks.
Old 09-19-2009, 11:17 AM
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Originally Posted by e60lurker' post='1011850' date='Sep 19 2009, 10:15 PM
I've noticed that alot of people seem to be running the 35 series up front and the 30 in the rear, or 30, 25 respectively. I too, ended up going this route when I ordered my tires a few days ago (they should be here on Monday!) but I realized that I never asked why this is common practice. Could you please offer a little insight?

Thanks.
Using 35 and 30 profile tires on 20" wheels will give more protection to the wheel and feel more comfortable.
Old 09-19-2009, 11:21 AM
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To get as close to stock wheel dimensions as possible. Bigger or smaller than stock wheel diameter will result in erroneous speedometer reading.
Old 09-19-2009, 11:32 AM
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Makes sense. Thanks.
Old 09-19-2009, 11:34 AM
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Originally Posted by Rizbel' post='1011855' date='Sep 19 2009, 10:21 PM
To get as close to stock wheel dimensions as possible. Bigger or smaller than stock wheel diameter will result in erroneous speedometer reading.
Overall diameters:
245/35 R19 = 25.75 in / 654.05 mm STOCK
275/30 R19 = 25.49 in / 647.44 mm STOCK

245/30 R20 = 25.78 in / 654.81 mm STOCK
275/25 R20 = 25.41 in / 645.41 mm STOCK

245/35 R20 = 26.75 in / 679.45 mm NON-STOCK
275/30 R20 = 26.49 in / 672.84 mm NON-STOCK
Old 09-19-2009, 01:32 PM
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Originally Posted by Anzafin' post='1011852' date='Sep 19 2009, 12:17 PM
Using 35 and 30 profile tires on 20" wheels will give more protection to the wheel and feel more comfortable.
+1 with that thicker sidewall. most cases it leads to needing the fenders to be rolled and/or cut, but worth it for the rim protection in my opinion.
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