997 Turbo / GT2 2006–2012 Turbo discussion on the 997 model Porsche 911 Twin Turbo.
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wheel size 18"

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Old Dec 10, 2011 | 05:07 PM
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wheel size 18"

Hello. If I purchase 18x10 wheels, can i put 305x35x18 wheels on the 10" wide rims? and what offset do i have to get those wheels with? can you tell me offset limits i can use for this setup on 997.1 turbo?
 
Old Dec 10, 2011 | 06:23 PM
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Make sure you keep the front/rear outside tire diameters the same ratio as stock or you will end up blowing your diff.
 
Old Dec 10, 2011 | 06:24 PM
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Hello. Stock 305x30x19 and 305x25x18 is less then .2" difference which is more then acceptable as the tire wear is more then this right?
 
Old Dec 10, 2011 | 06:54 PM
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Originally Posted by topspeedua
Hello. If I purchase 18x10 wheels, can i put 305x35x18 wheels on the 10" wide rims? and what offset do i have to get those wheels with? can you tell me offset limits i can use for this setup on 997.1 turbo?
Most tire manufacturers require a minimum 10.5 in wide wheel for a 305 tire. We think 11 is better.
Also, be sure to maintain the OEM revs/mile relationship front to rear or you will damage the drive train. There is only a 1% tolerance.
 
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