speedo reading w/ 18s
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From: Charleston, SC
speedo reading w/ 18s so what will 18s do to the speedo reading on my car? i've got an M6 so i'm assuming i have 3.23s (or do i?) so what if i put in 3.73s would that fix it or just jack it up worse?? need i move my thread to another forum? tried a search and didn't find anything useful, random results in random forums.
Wheel diameter has absolutely nothing to do with your speedometer . .
Tire diameter is the issue.
For example if you use the tire calculator up in the stickie, you'd see that a 275/40ZR17 is virtually the exact same OD as a 275/35ZR18, so no speedo calabrations would be needed.
The only way to correct a speedo is with a computer programmer.
Changing differential gears would never help in that situation.
Tire diameter is the issue.
For example if you use the tire calculator up in the stickie, you'd see that a 275/40ZR17 is virtually the exact same OD as a 275/35ZR18, so no speedo calabrations would be needed.
The only way to correct a speedo is with a computer programmer.
Changing differential gears would never help in that situation.
Thread Starter
12 Second Club
iTrader: (10)
Joined: Jan 2007
Posts: 226
Likes: 0
From: Charleston, SC
awesome thanks. i wanted to put 18x9.5s on my T/A and lower it using ground control coil overs. no clearance issues with anything there are they? also, i know that you're not supposed to go too big with the tires on only 9.5s but i can't find any wider C6-ZO6s. i don't suppose i would screw myself over by mounting 285/35s on there would i? i want to be able to rail corners but i want a wide enough tire to hook up when i pump up the power on my car. tires i was looking at are Nitto 555 extremes. maybe they'll hook up fine despite only being 285s?
