Anything needed to move to bigger wheels?

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KC Brooks

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:bwahaha:Hi folks. Been looking on a few sites and I haven'tfound the definitive answer. I have an 01 ST that came with 15" wheels. If I want to upgrade to 17" wheels, how can I mod/fix it so the speedo is accurate? Appreciate any help.
 
Depends on if you want to get a lower profile tire that maintains your stock rolling diameter, hence, no speedo change. A larger rim and a taller tire is posssible, BUT, you will need to check first on tire fitment with the wheel/tire calculator at the link below. And second you would have to order a programmer(SCT XCal) or other to reset your speedo for the new tire diameter. I think I've seen on here some people have gone to a 265mm width or maybe 285. BUT then, you will need to find an 8 to 9 inch wide rim, which means aftermarket. Stock wheels are only about 7.5 inches wide. So now you've gone from a set of tires($400-$600) add and XCal(about $300) then the wheels at least will set you back another $500-$800. So if you still want to do this, shop for the best prices on the net cause its gonna be at least $1200 to $1700 plus all the shipping, taxes, mounting/balancing and environmental fees to get rid of your old tires. Plus, what are you gonna do with the old rims? Scrap 'em if thier aluminum or put them in the garage so the wife can yell at you once a week about getting rid of them. Good luck, fun costs money...how much fun do you want to have? Bob
 
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if you keep the same type, IE 265/55/r15- 265/55r17 then it should not change anything, but if they are going to be different say..285/75/r17 then you will need something to get into the computer to change it, I swap between my 265/75/r16 and 285/75/r16 and use my xcal tuner to change it so other than using one of those I guess you might go to a shop that has something that can access your computer to change the revolutions per min.
 
My '04 has 265/60-18 tires. The wheels are 18" x 8.5" with 0 offset. No fitment or rubbing problems. The tires are wider than stock but the same rolling diameter.
 
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