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  #1  
Old 07-27-2011, 11:03 AM
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Tire size question

Hey guys,

I apologize if this has been answered somewhere else, not having much luck finding it. I have a 2011 GC laredo with 17" wheels and I am contemplating going with 22" KMC slides. Since there's not a programmer yet, can the dealer adjust my truck for the larger diameter tires? Is there another way to do it?
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Old 07-27-2011, 12:10 PM
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Re: Tire size question

What size tire are you going with? If you use a "plus" size tire the speedometer won't change much...potentially one or two mph's up or down. This is one of the best tire size calculators to help out.
http://www.miata.net/garage/tirecalc.html

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Old 07-27-2011, 02:30 PM
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Re: Tire size question

do you realize that wheel weighs 42lbs each?
that's a lot of unsprung weight you're adding
not to mention it's not hubcentric so centering rings required, just another potential vibration down the road...
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Old 07-27-2011, 04:12 PM
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Re: Tire size question

@ mtndog, good call on that link! Its says I would be within 1%. @Eurosport, I did NOT realize those would be that heavy. There's some braking implications and I don't even know wtf a centering ring is - last time I bought new wheels was 10 years ago for my mustang andthey were cobra R's. Getting a pretty good deal on the rims but that does have me thinking...

What I really want is just some stock god damn overland rims hahahaha! Maybe I am getting too fancy with these custom rims.
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Old 07-27-2011, 04:25 PM
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Re: Tire size question

Quote:
Originally Posted by Eurosport View Post
do you realize that wheel weighs 42lbs each?
that's a lot of unsprung weight you're adding
not to mention it's not hubcentric so centering rings required, just another potential vibration down the road...
That's not uncommon.

22" viper reps for LX's weight in at:

35.9 lbs. - 22x9
41.7lbs. - 22x10

The OEM 22's on a Cadillac Escalade are 88lbs each with tires.

Here's some Chrysler OEM Forged SRT8 20" wheels with tires:

300 SRT8 - 60.0 lbs.
Magnum SRT8 - 63.1 lbs.
Charger SRT8 -65.2 lbs.
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Old 07-27-2011, 04:51 PM
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Re: Tire size question

Quote:
Originally Posted by .moneen. View Post
That's not uncommon.

22" viper reps for LX's weight in at:

35.9 lbs. - 22x9
41.7lbs. - 22x10

The OEM 22's on a Cadillac Escalade are 88lbs each with tires.

Here's some Chrysler OEM Forged SRT8 20" wheels with tires:

300 SRT8 - 60.0 lbs.
Magnum SRT8 - 63.1 lbs.
Charger SRT8 -65.2 lbs.
yes not uncommon because we're talking low quality wheels here, that's what replicas are, weight is not taken into consideration, same level of quality as KMC wheels...

as far as the ones you mentioned as OEM with tires, you have to take into acct that a stock tire on those cars is 30-35lbs each, so wheels only weigh ~30lbs...but those are forged, different ballgame.

here's another calculator site: http://www.1010tires.com/TireSizeCalculator.asp
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Old 07-27-2011, 05:28 PM
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Re: Tire size question

Quote:
Originally Posted by Eurosport View Post
yes not uncommon because we're talking low quality wheels here, that's what replicas are, weight is not taken into consideration, same level of quality as KMC wheels...
Do you know the weight of a OEM 20” wheel? When you say “low quality” where are you putting the OEM wheels as far as quality.

Jeep didn’t spend any money putting on the POS Goodyear’s.
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Old 07-27-2011, 06:13 PM
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Re: Tire size question

There's no question that the OEM forged are great quality, and the runflats are heavy. But assuming he isn't going to those tires on his new wheels he'll save some weight there.

It's one if those things, what's worth more to you? Lighter forged wheels for a lot of money, or heavier cast wheels for less money.
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Old 07-28-2011, 04:06 PM
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Re: Tire size question

Quote:
Originally Posted by Eurosport View Post
as far as the ones you mentioned as OEM with tires, you have to take into acct that a stock tire on those cars is 30-35lbs each
Yup, they're heavy. I'm not sure what the OEM Jeep SRT8 wheels weight though.

The RS-A's on SRT8 Jeeps:

Front
Goodyear Eagle RS-A EMT
P255/45R20 = 36.88 lbs.

Rear
Goodyear Eagle RS-A EMT
P285/40R20 = 40.68 lbs.
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Old 07-28-2011, 04:15 PM
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Re: Tire size question

Quote:
Originally Posted by Eurosport View Post
as far as the ones you mentioned as OEM with tires, you have to take into acct that a stock tire on those cars is 30-35lbs each
Yup, they're heavy.

OEM Forged SRT8 Jeep wheels.
Front 20x9 = 36.2 lbs.
Rear 20x10 = 37.6 lbs

The RS-A's on SRT8 Jeeps:

Front Goodyear Eagle RS-A EMT
P255/45R20 = 36.88 lbs.

Rear Goodyear Eagle RS-A EMT
P285/40R20 = 40.68 lbs.

Mounted together the OEM SRT's weigh:
Front = 73 lbs
Rear = 79.2 lbs.
----------------------------------------------
KMC Slide 22x9.5 = 42lbs.
Nitto/Kumho/General 265/40/22 = 42lbs.

KMC's with a 265/40/22 they will weigh around: 84 lbs. each.

Which to me, isn't a huge enough increase to worry about.
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Old 07-28-2011, 05:46 PM
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Re: Tire size question

I agree, 5 pounds isnt that bad. Now I just need to make sure I am OK with the $2k that the rims/tires cost. Havent even made the first payment on the truck yet! Thanks a ton for your input guys. This is why I like forums - I haven't been on one since my mustang days 9 years ago!
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Old 08-02-2011, 02:54 PM
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Re: Tire size question

does anybody know the weight of the laredo x OEM 18" wheels
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