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  #1  
Old 12-01-2015, 09:37 PM
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Traction devices

CA. sometimes requires you to carry traction devices IE: tire chains or cables. I can't find anything in the manual about them. If needed I would think they would go on the rear since the AWD is biased to the rear. Am I correct?

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Old 12-01-2015, 09:46 PM
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Re: Traction devices

From the owner's manual (page 494 in the 7th edition)...

TIRE CHAINS (TRACTION DEVICES)

Use of traction devices require sufficient tire-to-body clearance. Follow these recommendations to guard against damage.

• Traction device must be of proper size for the tire, as recommended by the traction device manufacturer.

• Install on Rear Tires Only

• Due to limited clearance, the Security Chain Company (SCC) Super Z6 low profile traction device or equivalent is recommended on P265/60R18 or 265/50R20 tires.
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Old 12-01-2015, 09:48 PM
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Re: Traction devices

Page 487-488 of your owner's manual:
ImageUploadedByJeepGarage1449024530.221031.jpg


2013 Grand Cherokee Trailhawk 5.7L V8, 2015 JKUR AEV
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Old 12-01-2015, 11:33 PM
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Re: Traction devices

A prior version of the manual (6th edition) specifies:
Quote:
TIRE CHAINS (TRACTION DEVICES)

Use of traction devices require sufficient tire-to-body clearance. Follow these recommendations to guard against damage.
Traction device must be of proper size for the tire, as recommended by the traction device manufacturer.
Install on Rear Tires Only
Due to limited clearance, Thule XG-12 Pro or equivalent is recommended on P245/70/R17, P265/60R18 or 265/50R20 tires.
The Thule XG-12 Pro have a 12mm inside sidewall and treadface clearance.

The Super Z6 specified by the later edition manual has a 6.3mm inside sidewall clearance and a 31mm treadface clearance.

Older WK2 owner manuals said "Class S" or better is fine, which is 15mm inside sidewall clearance and 37mm treadface clearance.

I ended up getting some Peerless Auto-Trac #0232105 chains (ratchet auto-tightening). They meet "Class S". They're not as tight to the tire as the Super Z6, so I'm going to test fit in my driveway to make sure there aren't any clearance issues. If there are, I'm going to see if putting Quadra-Lift (air suspension) in Off-Road 1 is enough to clear.

I'm really hoping I don't have to use Super Z6. I hate cables. They just don't give the traction that a real chain does when the stuff is thick and nasty.

I'm in Washington State and the law around here is that when chains are required in the mountain passes, AWD/4WD vehicles with snow tires aren't required to put chains on, but are required to carry them.
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Old 12-04-2015, 05:22 PM
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Re: Traction devices

I wonder if a couple sets of these would suffice:
V-Bar Emergency Strap On Chains

I really like the Thule K-Summit system, but damn they are expensive.
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Old 12-04-2015, 05:35 PM
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Re: Traction devices

Unless it has changed in the past few years, California does not require traction devices or chains on 4WD vehicles equipped with snow tires. They didn't even used to require the snowflake symbol--the Michelin M+S got me past several check stations going over Donner. Only once do I recall them even checking tread depth.
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Old 01-16-2016, 04:31 PM
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Traction devices

Quote:
Originally Posted by akinney View Post
A prior version of the manual (6th edition) specifies:





The Thule XG-12 Pro have a 12mm inside sidewall and treadface clearance.



The Super Z6 specified by the later edition manual has a 6.3mm inside sidewall clearance and a 31mm treadface clearance.



Older WK2 owner manuals said "Class S" or better is fine, which is 15mm inside sidewall clearance and 37mm treadface clearance.



I ended up getting some Peerless Auto-Trac #0232105 chains (ratchet auto-tightening). They meet "Class S". They're not as tight to the tire as the Super Z6, so I'm going to test fit in my driveway to make sure there aren't any clearance issues. If there are, I'm going to see if putting Quadra-Lift (air suspension) in Off-Road 1 is enough to clear.



I'm really hoping I don't have to use Super Z6. I hate cables. They just don't give the traction that a real chain does when the stuff is thick and nasty.



I'm in Washington State and the law around here is that when chains are required in the mountain passes, AWD/4WD vehicles with snow tires aren't required to put chains on, but are required to carry them.

Any updates? Had a hellofa time getting up the drive to the cabin this weekend. All plowed, but still lots of ice. Was looking at the Z6 as well, but would also prefer actual chains as I need the most traction possible and don't need them for long distance or pavement driving. Just a couple hundred yards up a curvy hill.

Thanks!
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Old 01-20-2016, 03:52 PM
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Re: Traction devices

Quote:
Originally Posted by Knwilson View Post
Any updates? Had a hellofa time getting up the drive to the cabin this weekend. All plowed, but still lots of ice. Was looking at the Z6 as well, but would also prefer actual chains as I need the most traction possible and don't need them for long distance or pavement driving. Just a couple hundred yards up a curvy hill.

Thanks!
I test fit the Peerless Auto-Trac #0232105 chains in my driveway awhile back and they clear just fine. An inch or more clearance in all the tight spots. Rear wheels only, per Jeep owner's manual. On my Nokian Hakkapalita SUV R2 265/60R18 tires, it took some muscle to compress the tire enough to get the last tensioner connected. They're really tight against the tires with no slack at all. That's probably a good thing, but something to be aware of if you're in a hurry putting on these chains.

I wouldn't hesitate to use them at the 0-30MPH speeds allowed for the chains.

Here's some pictures of the tight spots and their clearances.
Attached Images
File Type: jpg 2015-12-22 14.28.02.jpg (533.2 KB, 9 views)
File Type: jpg 2015-12-22 14.28.27.jpg (544.8 KB, 8 views)
File Type: jpg 2015-12-22 14.29.36.jpg (516.6 KB, 8 views)
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