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Installing 18" wheels, what size tires?

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Old Nov 6, 2013 | 07:25 PM
  #1  
CandyBrandyWine's Avatar
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Installing 18" wheels, what size tires?

I just purchased 18x8 wheels tonight. I'm putting them on my 1987 Iroc with in the next week or so. What size tires should I use with this rim package? Also, should the rear tire be different from the front.
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Old Nov 6, 2013 | 07:41 PM
  #2  
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Re: Installing 18" wheels, what size tires?

Also, I read in a post that I have to lower the vehicle. Is this true and if so how far. If it has to be lowered what method do most use and where do you buy the parts to complete the lower.
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Old Nov 7, 2013 | 10:45 AM
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//<86TA>\\'s Avatar
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From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: Installing 18" wheels, what size tires?

You dotn have to lower the car to install different wheels. 245/40/18 is the most common fitment for that wheel size. Cant really go mch wider with that size
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Old Nov 7, 2013 | 02:15 PM
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From: Milltown, NJ
Car: 86 iroc, 02 v6 camaro
Engine: 350 HSR, 3800 V6
Transmission: T56, WCT5
Axle/Gears: 9in 4.11 posi, 3.23 LSD
Re: Installing 18" wheels, what size tires?

I have 255/35/18 on my 18x8 rims and 275/35/18 on 18x9s, imo this is perfect. lowering is not a necessity merely personal prefernece.
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Old Nov 7, 2013 | 03:19 PM
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paul_huryk's Avatar
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Car: 1984 LG4 Camaro
Engine: 350 Roller Motor
Transmission: Level 10 700R4
Axle/Gears: Strange 12 bolt 3.42
Re: Installing 18" wheels, what size tires?

245-40-18 is the right size for your wheels. It gives you the same tire diameter as stock (doesn't throw off your speedo) while not being too wide for your 8" wheels.
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