Lives The Dream
Well-Known Member
- First Name
- Meericole
- Joined
- Oct 1, 2019
- Threads
- 9
- Messages
- 90
- Reaction score
- 117
- Location
- The basement.
- Vehicle(s)
- 1955 cj5, 1995 YJ, 2006 LJ Rubicon, 2020 JT
Well I did ask if real world diameters are much different, but iām not sure what the comparison of a rubicon tire and a overland tire is for, Iām just looking at what came stock on an overland, if youāre using a rubicon tire thatās fine you chose to do it, but the factory chose the stock tires. Regarding slippage on the road though, isnāt this why you get bind in 4H in dry roads, because the part time system needs slippage, and on dry roads all four tires are turning at the same speed without slippage. With 2 different tire sizes on dry roads means 2 different wheel rpms without slippage, correct? Very short distances you are ok, but going longer or if you have to use 4H, there will be wear, and as itās a regular tire and not donut Iām sure some people will drive hundreds to thousands of miles before repair/replacement. I donāt no what it is where you live but people around here think nothing of driving on multiple donut tires at the same time for months and at 80 mph+. Jeep couldnāt assume someone wouldnāt do the same on their overland ās spare tire.Actually there's very little difference between the Overland stock tires and the Rubicon stock tires. The SPECS for the 18" overland tire is 32.2"
The spec for the 17" RUBICON A/T is - wait for it - NOT 33" but 32.8"
That's barely over 1/2" diameter difference! .6"
The diameter difference is what? Maybe 1.3" or so if that? A touch over an inche and a quarter. There's a lot of inches in a mile.
So frankly I'd not be too bothered by having to use a Rubicon tire as a spare - roads are never 100% perfectly straight so normaly driving will move the LSD anyway - it's a BIG difference when they lock and you have troubles. They slip easily when there's such a VERY TINY difference as 1 or 2".
IF you saw how they work inside - it takes more difference in torque between sides to apply more pressure to the mechanism. A typical LSD under no real torque difference can be broken free pretty easily.
If we are talking 1" or 2" difference side to side, I'd not be the slightest concerned, especially with a SPARE and a couple days driving. The rotational differences will be all but nil - you have more differences on interstate exists and country roads by a long shot.
I'll have to check the correct diameter of the spare, but I bet it's not much different in the end - use charts at Tirerack and similar sites, they have the manufacturer's specs.
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