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305/50/20? Using a Goodyear Eagle GT II, overall height is 32 inches, vs the 275/55/20 Eagle LS2 at 31.8 inches. Speedo would be off 0.5%, 60 mph with the stock tire would be 60.3 mph with the 305. Width is a tick above 1 inch wider overall.

 

295/50/20 also but there is only one choice on Tirerack.

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Damn....nevermind... This guys beat me to it. ^^^^

 

Tom,

Below is some information. I don't have first hand experience with the stock wheel offset and larger tires but if your factory wheel is at least 8.5" wide and with a around a 30mm offset then you can run a 305 tire like I have listed below, it is almost exactly the same diameter at 3/10ths of a percent bigger which will have no adverse effect on Speedo or factory shift calibrations. I have 305's on mine and these aftermarket wheels are 30mm offset.

 

I'm sure that somebody that has more experience with the stock wheels will chime in shortly.

 

 

 

This is your stock size...

275/55R20

Imperial Metric

Section Width: 10.83 in 275.00 mm

Rim Diameter: 20 in 508 mm

Rim Width Range: 7.5 - 9.5 in

Overall Diameter: 31.91 in 810.50 mm

Sidewall Height: 5.95 in 151.25 mm

Radius: 15.95 in 405.25 mm

Circumference: 100.25 in 2,546.26 mm

Revs per Mile: 651.84/mi

Actual Speed: 62.14 mph 100.00 kph

Speed Variance: -

Diameter Variance: -

 

Here is an alternate size if wheel permits...

305/50R20 Imperial Metric

Section Width: 12.01 in 305.00 mm

Rim Diameter: 20 in 508 mm

Rim Width Range: 8.5 - 11 in

Overall Diameter: 32.01 in 813.00 mm

Sidewall Height: 6.00 in 152.50 mm

Radius: 16.00 in 406.50 mm

Circumference: 100.56 in 2,554.11 mm

Revs per Mile: 649.84/mi

Actual Speed: 62.33 mph 100.31 kph

Speed Variance: 0.31% too fast.

Diameter Variance: 0.31%

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Damn....nevermind... This guys beat me to it. ^^^^

 

Tom,

Below is some information. I don't have first hand experience with the stock wheel offset and larger tires but if your factory wheel is at least 8.5" wide and with a around a 30mm offset then you can run a 305 tire like I have listed below, it is almost exactly the same diameter at 3/10ths of a percent bigger which will have no adverse effect on Speedo or factory shift calibrations. I have 305's on mine and these aftermarket wheels are 30mm offset.

 

I'm sure that somebody that has more experience with the stock wheels will chime in shortly.

 

 

 

This is your stock size...

275/55R20

Imperial Metric

Section Width: 10.83 in 275.00 mm

Rim Diameter: 20 in 508 mm

Rim Width Range: 7.5 - 9.5 in

Overall Diameter: 31.91 in 810.50 mm

Sidewall Height: 5.95 in 151.25 mm

Radius: 15.95 in 405.25 mm

Circumference: 100.25 in 2,546.26 mm

Revs per Mile: 651.84/mi

Actual Speed: 62.14 mph 100.00 kph

Speed Variance: -

Diameter Variance: -

 

Here is an alternate size if wheel permits...

305/50R20 Imperial Metric

Section Width: 12.01 in 305.00 mm

Rim Diameter: 20 in 508 mm

Rim Width Range: 8.5 - 11 in

Overall Diameter: 32.01 in 813.00 mm

Sidewall Height: 6.00 in 152.50 mm

Radius: 16.00 in 406.50 mm

Circumference: 100.56 in 2,554.11 mm

Revs per Mile: 649.84/mi

Actual Speed: 62.33 mph 100.31 kph

Speed Variance: 0.31% too fast.

Diameter Variance: 0.31%

I'll have a look at yours when we get around to doing the tune. Thanks!!

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FWIW I thought about doing this but decided against it for fear of rubbing. I ended up going with a more aggressive looking all terrain tire (Cooper Zeon LTZ) in the stock size. Glad I didn't I get a slight rub at full lock to the right only. Can't imagine it would be anything but worse with the 305s. I think it looks pretty decent compared to stock

 

Craig

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