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Jeep Gear & Install Packages!Rough Country Lift Kits and Parts!USA Standard Chromoly Front Axle Shaft Kits with Dana 30 4

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Unread 07-07-2008, 11:49 AM   #1
999666
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315/70/17

Was wondering if this tire size (315/70/17) wold fit on a stock JK with no lift?
Anyone try this setup or is a 2" lift needed.

Tires I have in mind are the Kumho Road Venture MT (KL71).

http://www.1010tires.com/tire.asp?ti...+MT+%28KL71%29

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Unread 07-07-2008, 12:26 PM   #2
BigJerm
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Thats a 34.5" tall tire and 12.4" wide. Height wise people have put that big a tire on a stock JK but turning, bumps, any kind of flex and I would think you would rub bad. I have a 2.5" Budget boost when I had my 35" tires and I had a lot run at full flex. As far as the tire being 12.4" wide, I am not sure that will work with the back spacing of the stock rims. Either you would need new rims or get wheel spacers.
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Unread 07-07-2008, 12:35 PM   #3
wTheOnew
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You'll definitely need spacers if you want to run the stock wheels with 12.4" wide tires.
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Unread 07-07-2008, 02:53 PM   #4
tricked919
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I think you'll need spacers AND a lift. If you plan on going off pavement at all, you'll need lift. I have 33x11.50's on AEV's that I believe have 2" less BS than stock as well as a 2.5" lift and I rub under full flex.

35's on my current set-up would definitely rub when fully tucked. Without a lift, I think running a tire that big is a disaster waiting to happen.
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Unread 07-07-2008, 06:36 PM   #5
Mountaineer19
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If your going to go to that size of a tire you may want to look at regearing also.
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Unread 07-08-2008, 06:16 AM   #6
999666
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Seems like 35" tires is a PITA, I do go wheeling fairly often so rubbing isn't something I want.
Geuss 33" is as big as I can go with an added 2"'s of backspacing on a new set of rims, tricked919 were is your rubbing @ full flex? front bumper or inside the fender?
What is the conversion you guys are using to turn 315/70/17 into 35"/12.4"/17" ?
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Unread 07-08-2008, 02:20 PM   #7
tricked919
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Quote:
Originally Posted by 999666 View Post
Seems like 35" tires is a PITA, I do go wheeling fairly often so rubbing isn't something I want.
Geuss 33" is as big as I can go with an added 2"'s of backspacing on a new set of rims, tricked919 were is your rubbing @ full flex? front bumper or inside the fender?
What is the conversion you guys are using to turn 315/70/17 into 35"/12.4"/17" ?
without a real lift and gears, 35's will be more of a burden than a benefit.
This is my rig with 33's fully tucked. I have about a 2" net lift after my bumpers and winch.

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Unread 07-08-2008, 06:51 PM   #8
999666
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^^^ Nice, looking like with proper backspacing and lift you can dial in 35's with the clearence you still have.
Thanks for the pic your tire size and advice .

So looks like to get the tire size I want I'd need at least a 3" lift, 2nd set of rims, a bumper that isn't sunk so far into the fender (i'd think even tricked919 33's would rub the stock bumper if he still had it) and gears.

Will most definatly see if just reving my 6 spd more is enough to compensate the TQ they will take away, if not would rather go FI then re-gear as I like my 3:73's. regardless can always re-gear after if needed....

Looks like my toy will get expensive soon...
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Unread 07-09-2008, 08:29 PM   #9
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Tire Math 101

315/70-17

315 is tire width in millimeters
70 is the profile, which represents a percentage of the width compared to the height
17 is the wheel size in inches

315 divided by 25.4 is 12.4, which is the tire width in inches
12.4 multiplied by .70 (which is really seventy percent) gives a sidewall width of 8.68"
You must account for both the top and bottom of the sidewall. You then add that to the wheel diameter like this:

8.68 X 2 = 17.36
17.36 + 17 = 34.36" tire diameter which is commonly sold and referred to as 35's

Pictures of my rig with BFG 315/70-17 tires and other mods are in my signature
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Unread 07-09-2008, 10:08 PM   #10
999666
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Thanks again all for educating me and answering all my questions .
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