Wheel and Tire Discussions - Page 10 - JeepForum.com

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post #136 of 2394 Old 10-17-2011, 08:28 PM
EVILUTION
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This is not my picture but I think the 275/55/20's look great on the stock wheels!



2011 JEEP GRAND CHEROKEE OVERLAND 4X4 HEMI
2002 JEEP GRAND CHEROKEE LIMITED QD
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post #137 of 2394 Old 10-20-2011, 11:45 AM
Terminator2
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New Plan for me though. I sold the stock 20 inch wheels and tires. Monday I have 305/60/18s comming and 18 x 9.5 wheels as well. I love the look of the stock 20s but they needed to be wider like at least a 9.0 IMO and during any kind of offroading the 20s will get messed up very easily do to little sidewall (50 or 55 series tire).
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post #138 of 2394 Old 10-25-2011, 10:20 AM
webspoke
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Quote:
Originally Posted by dedoman View Post
Hmmm. I wonder if this setup will work without spacers?! I'm putting a level or lift kit on... No QL.

Thoughts??
If you mean the 285/60/18's - it works fine with my QL at it's normal and highway setting (1/2" lower). There is another jeep on here without QL with the same tire on XD wheels also who has not mentioned any issues (see page 5 of this thread)

2013 White V8 Limited, 285/60/18 Terra Grapplers, 25000 miles problem free
2011 Black V8 Overland, retired at 46000 miles with QL problems
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post #139 of 2394 Old 10-25-2011, 01:07 PM
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Lots of good looking wheel/tire combos on here. I am looking at going skinny and taller on the Mopar Offroad Wheels or possibly even the Spare Steelies and plan to get the Rocky Road Outfitters 2.5" lift. All that being said, anyone have a guess if 265/70/18 (equiv. to 32.6x10.7x8.3) would fit?
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post #140 of 2394 Old 10-25-2011, 07:11 PM
My1stJGC
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Quote:
Originally Posted by webspoke View Post
Yes, your speedo will read low by 3%. It is about 2mph at 70mph (reads 70, actually running 72). I've checked mine against a GPS and that is pretty accurate.
Shouldn't you be running slower. According to www.1010tires.com mine being a laredo 245/70-17 vs 285/60-18 being slower. Stock 245/70-17 60mph & 285/60-18 58.1mph.
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post #141 of 2394 Old 10-26-2011, 10:22 AM
webspoke
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Quote:
Originally Posted by My1stJGC View Post
Shouldn't you be running slower. According to www.1010tires.com mine being a laredo 245/70-17 vs 285/60-18 being slower. Stock 245/70-17 60mph & 285/60-18 58.1mph.
285/60/18 are 31.5" vs 245/70/17 at 30.5" (same as all the other oem wk2 sizes). And I checked mine with a standalone gps as well, at it matches the calculations, about 3% error in the speedometer.

2013 White V8 Limited, 285/60/18 Terra Grapplers, 25000 miles problem free
2011 Black V8 Overland, retired at 46000 miles with QL problems
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post #142 of 2394 Old 10-26-2011, 11:24 AM
dedoman
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Quote:
Originally Posted by My1stJGC View Post
Shouldn't you be running slower. According to www.1010tires.com mine being a laredo 245/70-17 vs 285/60-18 being slower. Stock 245/70-17 60mph & 285/60-18 58.1mph.
I think he's on the mark!



Stock Tire - 265/60R18 >**optional tire 1** Tire 1 - 285/60R18 >Search Tires
Section Width: 10.43 in 265 mm
**optional tire 1 Section Width: 11.22 in 285 mm
Rim Diameter: 18 in 457.2 mm
**optional tire 1Rim Diameter: 18 in 457.2 mm
Rim Width Range: 7.5 - 9.5 in
**optional tire 1 Rim Width Range: 8 - 10 in
Overall Diameter: 30.51 in 774.95 mm
**optional tire 1Overall Diameter: 31.46 in 799.08 mm
Sidewall Height: 6.25 in 158.75 mm
**optional tire 1 Sidewall Height: 6.73 in 170.94 mm
Radius: 15.25 in 387.35 mm
**optional tire 1 Radius: 15.73 in 399.54 mm
Circumference: 95.84 in 2434.3 mm
**optional tire 1 Circumference: 98.83 in 2510.2 mm
Revs per Mile: 681.7
**optional tire 1Revs per Mile: 661.1
Actual Speed: 60 mph 100 km/h
**optional tire 1 Speedometer1: 58.1 mph 96.9 km/h
Speedometer Difference: - Speedometer Difference: 3.116% too slow
**optional tire 1** Diameter Difference: - Diameter Difference: 3.02%
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post #143 of 2394 Old 10-26-2011, 02:34 PM
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Quote:
Originally Posted by webspoke View Post
Yes, your speedo will read low by 3%. It is about 2mph at 70mph (reads 70, actually running 72). I've checked mine against a GPS and that is pretty accurate.

Then this is a typo.
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post #144 of 2394 Old 10-27-2011, 04:53 PM
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Anyone running LTX MS/2s at 275/55R20? Wondering if they will fit my Overland.
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post #145 of 2394 Old 10-27-2011, 06:20 PM
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Quote:
Originally Posted by My1stJGC View Post
Shouldn't you be running slower. According to www.1010tires.com mine being a laredo 245/70-17 vs 285/60-18 being slower. Stock 245/70-17 60mph & 285/60-18 58.1mph.
Bigger tires make fewer revs/mile which means the speedo will read slower than actual speed and odo will record fewer miles driven vs actual.
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post #146 of 2394 Old 10-27-2011, 06:29 PM
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over all dia of Michelin LTX M/S2 P275/55R20 is 31.9
over all dia of P265/60R18 is 30.5

1) 2011 Grand Cherokee LImited
Blackberry Pearl
5.7L
Quadra Trac 2
Lux Group 2
20" tires and rims
Towing package

2) 2011 Grand Cherokee Laredo X
Blackberry Pearl
5.7L
Quadra Drive 2
Quadra Lift
Laredo X Group 25 package
Chrome Fogs and Mirrors
Off-Road Adventure II Package
P265/60R18 Michelin LTX M/S 2's
BWoody 4" Velocity Intake
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post #147 of 2394 Old 10-28-2011, 06:56 AM
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Quote:
Originally Posted by wjs81866 View Post
over all dia of Michelin LTX M/S2 P275/55R20 is 31.9
over all dia of P265/60R18 is 30.5
Speedo would read 4% low vs stock so at 100MPH indicated it is 104 MPH actual speed. Mine is off about 6% from stock.
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post #148 of 2394 Old 10-28-2011, 08:28 PM
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Has anyone tried 265/70-18's ?
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post #149 of 2394 Old 11-01-2011, 07:12 PM
My1stJGC
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Quote:
Originally Posted by Terminator2 View Post
Bigger tires make fewer revs/mile which means the speedo will read slower than actual speed and odo will record fewer miles driven vs actual.
I know that but what webspoke said was is your speedo will read low by 3%. It is about 2mph at 70mph (reads 70, actually running 72) It shouldn't be 72 but 68. Like I said I like the setup but can't find wheels that look like heavy boat anchors.
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post #150 of 2394 Old 11-06-2011, 04:29 PM
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So by my calculations -

285/60/18 and 265/65/18 are almost the same sized tire...? This would open up some other rub free options if the nitto isn't your first choice.

Specification Sidewall Radius Diameter Circumference Revs/Mile Difference
285/60-18 6.7in 15.7in 31.5in 98.8in 641 0.0%
265/65-18 6.8in 15.8in 31.6in 99.2in 639 0.3%

I love the vision warrior wheel in this thread. Any reason this other size wouldn't work as well? I'm pretty partial to the cooper st or BF TKO. But I did like what I read about the nitto grappler and their price point is sweet.

Anything I'm missing?
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