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I have 05 GT Convertible. I want to go to an 18'' deep dish wheel. My question is do I want 9's or 10's. Any suggestions would be appreciated & I truly welcome "experience". I am assuming that there is NO modifications to adding 18's vs the 17's I have on now. Will I experience any problems with "deep dish"? Thanks :)
 

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I would go 9" wide in the front and 10" wide in the rear. The only thing you might have a problem with is the speedo reading incorrectly due to the tires being a different diameter than stock.
 

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I would go 9" wide in the front and 10" wide in the rear. The only thing you might have a problem with is the speedo reading incorrectly due to the tires being a different diameter than stock.
Just make sure you get them same diameter and you won't have any problems. 17-20's need no modifications. My favorite deepdish rims would have to be black bullitts with a chrome lip.
 

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I have 05 GT Convertible. I want to go to an 18'' deep dish wheel. My question is do I want 9's or 10's. Any suggestions would be appreciated & I truly welcome "experience". I am assuming that there is NO modifications to adding 18's vs the 17's I have on now. Will I experience any problems with "deep dish"? Thanks :)
If you want to be able to rotate get 9's all around. They'll be just fine for plenty of performance, and if you want to put on really expensive rubber, you'll save a lot of money by not having to toss them both (both fronts or both backs) when one is significantly more worn. I'm running 275 on a 9" rim and the shop is ok with putting on up to 285. but if you're going to keep them uniform I would keep it below 265.
 

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Not for sure what the question is, but a tire that is too small for a rim looks stupid. If you want the best look for a rim, go with a tire that fits exact or just a little bigger.
 

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9 in front 10 in back 245/45/18 up front and 275/40/18 in back is what I'm rollin now. waiting for the 275's to wear out so I can put some more meat back there. no speedo recalibration was needed because they were almost the exact height of the stock tire




 

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9s in the front will be fine if you put the right tire size. 10s in the back are also good if you put the right tire size. too big will result in rubbing.

also, the right offset makes a difference also.
 

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Bob The Mo'fukkin Builda!
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IMO a 275 on a 10" rim is way to small. i had a 285 on a 9.5" rim and i thought that was to small also. 10" rims should get nice fat tires. at least 305's, but 315 would look even better.that and a 275 out front on a 9" rim.
 

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IMO a 275 on a 10" rim is way to small. i had a 285 on a 9.5" rim and i thought that was to small also. 10" rims should get nice fat tires. at least 305's, but 315 would look even better.that and a 275 out front on a 9" rim.
+1, I've got 275/50 drag radials on a 17x9 and they look narrower than the 255/50's up front.

 
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