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Thread: Rear Wheel Clarence
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06-21-2015 #1
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Rear Wheel Clarence
How much clearance is need between frame rails and outer rear quarter? Wheel are 18 by 12 inch wheels.
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06-21-2015 #2
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Trying to measure for rearend
06-21-2015 #3
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Depends on the car - shape of wheel openings and also ride height. No easy answer that I am aware of.
Don1969 Camaro - LSA 6L90E AME sub/IRS
1957 Buick Estate Wagon
1959 El Camino - Ironworks frame
1956 Cameo - full C5 suspension/drivetrain
1959 Apache Fleetside
06-21-2015 #4
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As Don said there is now easy answer to this question. It might help if people knew what type of car?
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Chris--
'72 Cutlass S LSA/T56 Magnum
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06-21-2015 #5
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Rear Wheel Clarence
12 inch wheels are actually 13" wide.. 335 tires are just a tiny bit wider overall, so figure a minimum of 14", but preferably more to allow for suspension movement and tire sidewall flex.
But yes it does depend on the car.. A lot of quarter panels are deceiving, and ride height is a factor.
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06-22-2015 #6
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Car? Year? Tires? Lowered?
06-22-2015 #7
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1969 camaro 18 wheels with 335 tires ridetech coil over suspension.
06-22-2015 #8
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Do you already have the wheels? I have about an inch of clearance to the inner and 1/2 an inch to the outer. As the rear axle articulates it pulls the tire towards the inner and away from the outer so keep that in mind.
06-22-2015 #9
Starting The Transformation
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With that tire, that car, and a stock/modified stock frame rail you don't really have an option for clearance. You just have to center it in the wheelhouse as best you can.
If you are cutting out the floor and backhalfing the car with new frame rails, then you have a lot more options. We typically recommend two inches on either side. The taller the sidewall the more it will deflect under cornering and move toward the inside of the corner.
My best recommendation is to measure the car and the wheel/tire combo that you're going to use. EVERY car is slightly different. We have a worksheet that has a lot of math that double checks itself.http://www.cachassisworks.com/cac_worksheets.html
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