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Unread 10-16-2011, 09:57 AM   #1
Moroney167
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What lift needed for 31 tires

I want to fit 31x10.5 on 15x7 wheels with 4.00 backspacing. What lift would you suggest to make it happen! Ist my girls DD and won't be wheeled more than a feild or climbing a curb.

Was considering RRO's Rockfather II lift 3" but seems there not the favorite on this site. I enjoyed talking to the two guys I spoke with when I called and they deff. have plenty of hands on knowledge but. I'm new so what do I know.

help

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Unread 10-16-2011, 12:31 PM   #2
tommudd
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read through the various posts
use OME coils 927s / 948s either Bilstien or OME shocks
if you want more lift we can show you how.
Doesn't matter if she never goes off road since on road ride and handling will be 100 times better
RRO only uses front OME springs and their own rear springs and cheap shocks
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Unread 10-16-2011, 01:44 PM   #3
Moroney167
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Thank you. I was on phone fr order and was told OME shocks. So would I be better off buying OME 1.5" kit then spacers to make all fit. Just want to know from someone hands on tell me I'm ok fitting these tires I am starting to get nervous. Need my girls rig to be right. Being all OME stuff is back ordered still I may call and cancel my order if RRO is this bad.
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'04 Rubicon Auto - 3" Savvy/Currie Lift - Rancho 9000's - 4.88's - 33x10.5 KM2's on 15x8 Black Rock Vipers - 1.25" BL/1" MML - UCF Extra Clearance Aluminum Skids - Warn M8000-S - Besrk Rear Bumper/Carrier - JCR Stubby F. Bumper
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Unread 10-16-2011, 02:09 PM   #4
tommudd
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First OME springs give you more than 1.5 inches of lift ( from new stock height) You'll end up about 21.75 or so with just springs ( new stock is 19 in front) with a 1/4 inch top pate and a clevis lift you'll be at 22.50 or so when settled in
RRO uses OME front shocks but unless you request their own rear
Lots better places with actual customer service that are great to deal with.
AllJs and JeepinByAl are both great companies to get lifts from . You can just buy springs, whole kits whatever you want
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Unread 10-16-2011, 03:48 PM   #5
jamesdart
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i just did the ome hd lift and bilsteins, the ride is way better than stock. my wife hated driving or even riding passenger in my kj before, today we went to a truck show and i felt we had to take it, she was surprised with the change, said it felt liek a new car. for being the hd springs, it isnt firm at all, i think id be pissed if i bought anything less. im running the 245 70 16s which are 29.5, it sure looks like there is room for more, but i cant say if a 31 would fit without the top plate or clevis lift, but those are cheap and easy if needed. i dont wan tot buy new rims, but im thinking of doing the 1" wheel spacers.
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Unread 10-16-2011, 05:53 PM   #6
LibertyTC
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In my situation I used Boiler's 3/8 steel Top Plate. New at 22.75 inches hub to flare.

I also used clevis lift 3 conduits to driver's side & two to passenger as driver side seems to settle lower.
Now level. OME 927-948's also & Bilstien Shocks. TeraFlex bump stop & hockey pucks rear.

I ended having to use JBA 4.5 A-Arms as the top plate and clevis made the springs hit the stock A-Arm.
Also Spidertrax 5x4.5x1.25 got utilized to git rid of some tire rubbing and give clearance from inner fender well.

The difference from the bagged suspension where I could barely get 3 fingers wide between tire and fender to where you can now stack the tall coffee on top of tire is sweet.
It rides better than new to say the least now.

I will let other's comment on true 31" tires though, they may still rub without pinch weld pounding... in turns.
I have 245-65-17 Silent Armors On and am pretty happy with this set up, until these tires wear out. Then May go taller.
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Unread 10-16-2011, 07:17 PM   #7
Moroney167
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Quote:
Originally Posted by LibertyTC
In my situation I used Boiler's 3/8 steel Top Plate. New at 22.75 inches hub to flare.

I also used clevis lift 3 conduits to driver's side & two to passenger as driver side seems to settle lower.
Now level. OME 927-948's also & Bilstien Shocks. TeraFlex bump stop & hockey pucks rear.

I ended having to use JBA 4.5 A-Arms as the top plate and clevis made the springs hit the stock A-Arm.
Also Spidertrax 5x4.5x1.25 got utilized to git rid of some tire rubbing and give clearance from inner fender well.

The difference from the bagged suspension where I could barely get 3 fingers wide between tire and fender to where you can now stack the tall coffee on top of tire is sweet.
It rides better than new to say the least now.

I will let other's comment on true 31" tires though, they may still rub without pinch weld pounding... in turns.
I have 245-65-17 Silent Armors On and am pretty happy with this set up, until these tires wear out. Then May go taller.
So out of all that how tall is your lift.
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Unread 10-16-2011, 07:43 PM   #8
Moroney167
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Well. Let's say I go just plan Jane the OME lift. What tire size can I use on these 15's. 245/75-15? Can I go 265?
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Unread 10-16-2011, 07:56 PM   #9
tjkj2002
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Anything much above a 245/70R16 in a "P" rating will rob your power,trans shifting,and mpg's by a good amount.If just for daily driving I would not go much above that unless your going to regear which typically costs between $1200-$1800 in a KJ and can only go to 4.10's unless you drop another $1500 for JBA's steel front diff conversion.


I ran 265/75's when my KJ still had IFS and can tell you there was major power issues until I regeared to 4.10's and it was night and day difference.


Just do a straight OME lift(927 front coils and 948 rear coils),new shocks all around(OME or Bilstien),and slap some "P" rated AT's on in the 245/70 size and you'll be ready to rock and roll and will be able to do more offroad then you'd think for such a mild setup and the streetability will be 1000 times better.
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Unread 10-16-2011, 08:07 PM   #10
tommudd
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Quote:
Originally Posted by Moroney167 View Post
So out of all that how tall is your lift.
He's at 22.75 so thats 3.75 over stock height of 19 inches new
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Unread 10-16-2011, 08:09 PM   #11
tommudd
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Quote:
Originally Posted by tjkj2002 View Post
Anything much above a 245/70R16 in a "P" rating will rob your power,trans shifting,and mpg's by a good amount.If just for daily driving I would not go much above that unless your going to regear which typically costs between $1200-$1800 in a KJ and can only go to 4.10's unless you drop another $1500 for JBA's steel front diff conversion.


I ran 265/75's when my KJ still had IFS and can tell you there was major power issues until I regeared to 4.10's and it was night and day difference.


Just do a straight OME lift(927 front coils and 948 rear coils),new shocks all around(OME or Bilstien),and slap some "P" rated AT's on in the 245/70 size and you'll be ready to rock and roll and will be able to do more offroad then you'd think for such a mild setup and the streetability will be 1000 times better.
X's two
getting anywhere over that and you start with other issues which never end, you see where its taken me and tjkj, well you can see how far he's went now
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Unread 10-16-2011, 08:12 PM   #12
Moroney167
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Quote:
Originally Posted by tjkj2002 View Post
Anything much above a 245/70R16 in a "P" rating will rob your power,trans shifting,and mpg's by a good amount.If just for daily driving I would not go much above that unless your going to regear which typically costs between $1200-$1800 in a KJ and can only go to 4.10's unless you drop another $1500 for JBA's steel front diff conversion.


I ran 265/75's when my KJ still had IFS and can tell you there was major power issues until I regeared to 4.10's and it was night and day difference.


Just do a straight OME lift(927 front coils and 948 rear coils),new shocks all around(OME or Bilstien),and slap some "P" rated AT's on in the 245/70 size and you'll be ready to rock and roll and will be able to do more offroad then you'd think for such a mild setup and the streetability will be 1000 times better.
Thanks sounds decent.. Wish I didn't read so much before and talk myself into these 31x10.5's... i'll loose a little money but i'll order tires tomorrow I bought them pre mounted from discount tire direct which have been great to me. I want to use these wheels so will I still be ok with them?

15x7 4.00 backspace
245/75-15? BFG A/T
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Unread 10-16-2011, 08:15 PM   #13
tjkj2002
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Quote:
Originally Posted by tommudd View Post
X's two
getting anywhere over that and you start with other issues which never end, you see where its taken me and tjkj, well you can see how far he's went now
What on earth are you talking about,I'm totally stock

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Unread 10-16-2011, 09:32 PM   #14
tommudd
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Yep totally stock Troy..........
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Unread 10-17-2011, 02:33 AM   #15
01CHEEKEE
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15x7 4.00 backspace
245/75-15? BFG A/T[/QUOTE]


Thought 15's wont clear calipers on our kj? I've seen it mentioned numerous times
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