Did you drop your spare after changing tire sizes?
02-14-2019, 11:37 AM
#31
Senior Member
I have OEM tires/wheels and my spare is a different manufacturer (pirelli, i think), and while it is supposed to be the same size, it triggers a traction control fault when I use it. Not sure why that happens. Not really an issue as it just warns me it's not available, but still. Strange.
02-14-2019, 12:23 PM
#32
Senior Member
I moved from my OEM 17" wheels to the OEM 18" wheels and the tire diameter changed. I found a really good used 17" tire that is the same diameter as the OEM 18s to use for my 17" spare wheel. Good for any emergency use.
02-14-2019, 02:05 PM
#33
Senior Member
The differential has the ability to deal with 2 wheels on the same axle going different speeds, hence the name. It happens every time you go around a corner. Unless you activate the e-locker then it can't.
The transfer case is locked same speed between front and rear. It cannot handle 2 different speeds between front and rear (different size tires).
If you are in 2wd and put a different size spare on it is ok in any position. If you put it on the rear don't use the e-locker. Do not use 4wd with different size tires.
The transfer case is locked same speed between front and rear. It cannot handle 2 different speeds between front and rear (different size tires).
If you are in 2wd and put a different size spare on it is ok in any position. If you put it on the rear don't use the e-locker. Do not use 4wd with different size tires.
A lot of you guys should google what a differential is, and does. Then google what a locker, or differential spool does.
The following users liked this post:
son of bob (02-16-2022)
02-14-2019, 02:16 PM
#34
Senior Member
Yes. It sounds harsh, but you need to pay to play. If you decide to run a 33" tire, you should be running a 33" spare. I'd never run a tire that was 1" less in diameter while running in 2WD much less 4A or 4WD
02-14-2019, 07:56 PM
#35
Senior Member
Join Date: Mar 2017
Location: South St. Louis county, Mo.
Posts: 1,463
Received 423 Likes
on
303 Posts
You do NOT need the same size spare! The spare can be on any corner as long as you don't run 4wd or use the elocker if it is on the back. Read the post a few back.
The following 2 users liked this post by KWS 2.7:
Mikesfx4 (03-05-2019),
son of bob (02-16-2022)
02-19-2019, 01:29 AM
#36
The wheel diameter of the spare has absolutely nothing to do with mechanical compatibility... as long as the overall tire diameter is the same. You could run a different wheel diameter on every corner (pending caliper clearance) in 4WD, if the tire diameter is the same on each corner.
02-19-2019, 10:22 AM
#37
Senior Member
03-05-2019, 07:52 PM
#38
Junior Member
Broke down and bought a replacement BFG LT 275/70r18 KO2 last fall to replace my OEM spare tire (finally realized it wasn't worth the risk). There was no problem fitting that 33.2 inch tire in the spare position.
03-05-2019, 08:00 PM
#39
This thread finally motivated me to order a 35" Rdige Grappler to fit the spare wheel. Because the spare wheel is a different diameter, I wasn't able to get a tire of the exact same height, but it's only about 3/10" difference which is much better than the 3" or so that I was off before. I can confirm that a 35.08" tire fits without issue.
The following 2 users liked this post by Harry Franklin:
son of bob (02-16-2022),
THEPISTONHEAD (02-22-2021)
03-05-2019, 08:10 PM
#40
Senior Member
I keep plugs, tools and an air compressor in all of my vehicles. I've only had to use the spare twice in the last 20 years and was able to plug one of those long enough to get to a shop where they mounted the spare for me. But I'd not drive without a spare. I've plugged 15-20 tires over the years, mostly helping out other stranded drivers, but several of my own. It is a lot easier, quicker, and even safer to simply plug the hole and air up than get out the jack and put on the spare. In some cases the tire was too far gone to save, but the plug got me home and to a shop.
It is BEST if all 4 tires are exactly the same size and type on all vehicles. It won't damage anything unless you're in 4x4 or have the diff locked. But different size and tire types will cause erratic handling and braking. They should only be used for limited distances and at reduced speeds.
It is BEST if all 4 tires are exactly the same size and type on all vehicles. It won't damage anything unless you're in 4x4 or have the diff locked. But different size and tire types will cause erratic handling and braking. They should only be used for limited distances and at reduced speeds.
The following users liked this post:
son of bob (02-16-2022)