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Thread: will 275 fit on a 9in wide rim
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03-16-2013, 07:49 PM #1Sr. Apprentice
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will 275 fit on a 9in wide rim
im basically putting some pieces together and i see on these tires that the recommend a skinnier wheel but i want to put http://us.coopertire.com/Tires/Light...-S-T-MAXX.aspx in 275/70/18 on these wheels
http://www.tirerack.com/wheels/Wheel...All&sort=Brand
anyone have any input im kind of stuck and dont want to go through the hassle of ordering wheels and tires from different sites to find out they dont fit
thanks
03-16-2013, 08:20 PM #2
Here are the Specs, on a 275/70/18....below under the Rim Size, this size tire will fit Rims that are at a min of 7.5in"s in width and to up a max of 10.5in" Rim Width.
Tire size 275/70-18 Section width 275 mm (10.8'') Sidewall 193 mm (7.6'') Tire Diameter 843 mm (33.2'') . Rim Sizes 18x7.5 to 18x10.5
MIKE


99" SILVERADO
03-16-2013, 08:21 PM #3Sr. Apprentice
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ok yea on the cooper website it says they recommend 8.5 max thats why im kind of concerned just want to make sure theres no un even wear or any negatives to it, thanks for the input
03-16-2013, 08:34 PM #4
03-16-2013, 08:43 PM #5Sr. Apprentice
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ok sounds like it will work, i finally found a wheel i like and a tire i like thats affordable. lot of work trying to get a good match thanks for the reply
03-16-2013, 08:44 PM #6
I would also mention.......if you Install a Larger Overall Diameter Tire, then what you have on your Truck Now......Keep in Mind, your Trucks Computer Calculates your Trucks Speed based on the Diameter of the Stock Tires. by installing Taller or Shorter Tires, the Trucks Computer doesn’t know how Fast the Truck is going. As a Result, the Automatic Transmission may Not Shift Correctly and the Speedometer Readings will Not be Accurate(as required by law)......and You Should and/or Need to have your Trucks Computer reprogrammed for this Change in Tire(Overall Diameter)Size.Last edited by 99'HEARTBEAT; 03-17-2013 at 09:37 AM.
03-16-2013, 08:46 PM #7Sr. Apprentice
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well im running 32 in 265/70/17 now so you think that jump would still really effect that?
03-16-2013, 08:54 PM #8
Here are the Specs on the 265/70/17's....and the 275/7018's,
Tire size 265/70-17 275/70-18 Section width 265 mm (10.4'') 275 mm (10.8'') Sidewall 186 mm (7.3'') 193 mm (7.6'') Tire diameter 804 mm (31.7'') 843 mm (33.2'')
39 mm (4.9%) taller.Rim sizes 17x7.5 to 17x10 18x7.5 to 18x10.5 Circumference 2525 mm (99.4'') 2647 mm (104.2'') Revs per mile 637.5 608 Speedometer Assuming that this is OEM tire and speedometer readings are correct >>> When Speedometer reads 60mph (96.6km/h) actual speed will be 62.9mph (101.3km/h): 4.8% faster.
The below site, is where I received the Specs on these 2-Tire Size's, its a Great Site!!!,
http/wwwrimsntires.com/specs.jsp
Last edited by 99'HEARTBEAT; 03-18-2013 at 10:17 AM. Reason: Added Infor.
03-16-2013, 08:58 PM #9Sr. Apprentice
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damn that is really helpful. thanks i appreciate it. see and im not much of a car minded person so i wouldnt really think that adding an inch would change my speed almost 3mph. im assuming that can do some major damage to a tranny.
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where would you recommend i go to get it re-programmed? a dealership? also any idea ballpark the cost on that?
03-16-2013, 08:59 PM #10
The speedometer wouldn't really bug me that bad, BUT Mike's right about the shift points. You will know if it starts up and down shifting going up hills more then it used to, to me 33" tires are borderline depending on your gear ratio. Congrats on your choice, they look real nice!!
You'll get a long time out of the tranny depending how you drive, my boyfriend had 33"s on his Colorado and he ran it with 3.42 gears and a 5 cylinder. It constantly downshifted, and was annoying as hell but he kept driving it. The 4l60e held up fine, but after about 50,000 miles of this the 3 and 4 clutches finally wore out and were in need of replacement.2004 Chevy Colorado
LS1 5.7 swap/TBSS rear axle swap

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