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Whats the most I can go?


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Height and width? Increasing height (diameter) will throw the speedometer off and effectively this is like reducing the differential gears making the performance sluggish. Diameter can be kept near stock by careful selection of 60 or 50 series tires.

 

Ahis should be considered before buying rims. The biggest factor is the offset or back spacing. This is where the center line of the rim is in relation to the wheel mounting surface (WMS) If the offset is too negative, wheel center line away from vehicle, the outer edge of the rim may already be outside the fender lip. A rim with too much positive offset can rub suspension or frame on turns or bumps. There are on line calculators for this and all you do is make a few measurements and plug in the numbers. (I know, you have to do this yourself)

 

Never, never, never have to make the vehicle fit the rims. Rims should be selected to fit the vehicle to allow proper tire clearance.  This is like falling in love with a beautiful girl and then finding out she's high maintenance, a total bitch, and YOU have to make all the changes in order to keep seeing her.

 

With the torsion bars raised I managed 235s but it was an unknown chev or ford 6 bolt rim. 31 x 10.5 rubbed even with a 4" body lift. In addition the steering effort went way up and I began parking in places I could just drive away from without having to arm wrestle the steering.

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You should really not get too excited. 67's offset is not known. Your offset could easily throw your 205's into the fender or strut tower.

 

A 620KC does not have strut towers.   ^_^

 

Our shop truck has 195s on a 14x6 zero offset and it fits fine, even at a fairly low ride height. 

 

1527536_1379234055650577_655702664_n.jpg

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It all depends on the rim.

 

I seem to remember having 225s and later some 235s on my 620. That's 8.25 and 9.25" wide by 28.8" high. Again unknown 15" rims and truck was cranked up. 31x10.5 did not fit without rubbing on bumps and turns, even with a 4" body lift. I suppose with enough lift any tire/rim combo will work.

 

Not it doesn't have strut towers and wouldn't hit a strut tower anyway... it would hit the side of the strut tube.

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