Biggest spare tire?
Laughing Gas
Joined: Oct 2013
Posts: 1,028
Likes: 22
From: MA
I can only give my experience, which is with what are nominally ~34/35" tires. I have them on all four wheels, but my spare won't fit a tire that large, it won't even fit a 285/70/17 up there...so I just have a dinky 265/70 on the spare for that "worst case scenario" where I can't call a buddy or AAA. Granted, I have an aftermarket class V hitch which is bigger than OEM, but still. So based on that, I'd be weary of stuffing a 37" up in there.
Tuned
Joined: Sep 2014
Posts: 282
Likes: 3
In an emergency you can put the smaller tire on the front while NOT using 4x4. If it's a front that goes flat then no biggie. If a rear goes flat you would want to put one of the fronts on the rear (same size). This way you won't grenade the differential.
Lead Driver
Joined: Mar 2004
Posts: 5,372
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From: Northern Indiana
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Hotshot
Joined: Mar 2007
Posts: 10,101
Likes: 40
From: Pa
With the factory hitch a 33" is about all you can get. Maybe you can get a 34" under there if you push hard enough.
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New User
Joined: Oct 2015
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that's what I was thinking.
Elder User
Joined: Dec 2004
Posts: 613
Likes: 1
This really depends if he has an open diff or not. I can't see any issues running a smaller spare tire, temporarily, on the rear if it is an open/electronic locker.
Laughing Gas
Joined: Sep 2005
Posts: 984
Likes: 8
I have a 35 under my 2014. I doubt you will get a 37 to make it. Like mentioned earlier with a smaller spare it needs to go on the front axle with the hubs unlocked. I had to do exactly that when I had a 37 go down. Unless you mount a full-size spare in the bed it comes with the territory
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Techhokie
1999 - 2016 Super Duty
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Sep 19, 2006 09:54 PM