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Pontiac of the Month

Pedja's 1968 Firebird

2019 March
of the Month

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Hey guys I want to put a nice set of wheels on my firebird. I was wondering if anyone has put a set of 17’s or 18’s on a firebird or camaro. I know the pattern is 5X120 but I’m not sure what offset would give me the look I’m going for. And also how wide can you go without scrubbing.. I want the wheels and tires to run flush with the quarter panel or maybe a hair inside so they will have the tucked look when I lower it.

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The offset is determined more by the width of the wheel you are running rather than the height. So are you planning on running a 6", 7", 8", or even 10" wide wheel? The factory was pushing it with an 8" wheel for a '68 Firebird, 6" or 7" were common for the day. Another thing to consider is rolling the lip of the fenders to gain more clearance.

I recommend purchasing a Percy WheelRite Wheel and Tire Fitment Tool so you can accurate measure offset, backspacing, and tire size of any car. It's cheap at under $100 from Summit Racing. That way you can get as much tire and wheel under each corner as the car while allow.

https://www.summitracing.com/search?SortBy=BestKeywordMatch&SortOrder=Ascending&keyword=percy wheel

 

Edited by Frosty

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3 hours ago, Frosty said:

The offset is determined more by the width of the wheel you are running rather than the height. So are you planning on running a 6", 7", 8", or even 10" wide wheel? The factory was pushing it with an 8" wheel for a '68 Firebird, 6" or 7" were common for the day. Another thing to consider is rolling the lip of the fenders to gain more clearance.

I recommend purchasing a Percy WheelRite Wheel and Tire Fitment Tool so you can accurate measure offset, backspacing, and tire size of any car. It's cheap at under $100 from Summit Racing. That way you can get as much tire and wheel under each corner as the car while allow.

https://www.summitracing.com/search?SortBy=BestKeywordMatch&SortOrder=Ascending&keyword=percy wheel

 

Mike, Frosty is correct Percy’s is a great tool! I’ve also attached a link to a site that is pretty helpful. 

https://www.rimsntires.com/specspro.jsp

This site lets you visually see the differences between factory and the mods you might make. It also gives the differences the speedometer readings if there is a overall tire size variation.

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Awesome thanks for the info. Was hoping to see some pics of some that had wheels on it but the links help for sure

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