Rock Krawler Flex kit and Rubbing

Thashef

Well-Known Member
Joined
Jul 14, 2018
Messages
87
Reaction score
31
Location
Northern NJ
Vehicle(s)
2018 JLU Sahara - Bright White
I am about to start installing a RK Flex 2.5" kit on my Sahara. The wheels I ordered are the Rocktrix RT105 with 5.5" backspacing.

Question is how much rubbing will I have, do I need to switch out the wheels to 4.5". I was thinking of having a less poke and thats why I ordered 5.5.





Advertisement

 

Roky

Well-Known Member
First Name
Roky
Joined
Oct 4, 2018
Messages
3,919
Reaction score
11,282
Location
North Central Florida
Vehicle(s)
2018 JLUR
Build Thread
Link
Vehicle Showcase
1
I am about to start installing a RK Flex 2.5" kit on my Sahara. The wheels I ordered are the Rocktrix RT105 with 5.5" backspacing.

Question is how much rubbing will I have, do I need to switch out the wheels to 4.5". I was thinking of having a less poke and thats why I ordered 5.5.
You need 4.5 back spacing at most to clear lcas at full turn. Especially on Sahara, axles are a little narrower than Rubi axles.
 
OP
Thashef

Thashef

Well-Known Member
Joined
Jul 14, 2018
Messages
87
Reaction score
31
Location
Northern NJ
Vehicle(s)
2018 JLU Sahara - Bright White
  • Thread starter
  • Thread Starter
  • #3
You need 4.5 back spacing at most to clear lcas at full turn. Especially on Sahara, axles are a little narrower than Rubi axles.
Would the front and rear both rub? Could I do the trick of adjusting the steering stop that is suggested in another thread.
 

ChattVol

Well-Known Member
Joined
Jun 29, 2018
Messages
2,445
Reaction score
2,566
Location
Tennessee
Vehicle(s)
JLU 4 door
Would the front and rear both rub? Could I do the trick of adjusting the steering stop that is suggested in another thread.
I previously ran the RK 2.5" lift with 33s and 35s with the same Sahara width axles. What size tires do you plan to run and do you want to be able to flex the jeep wheelin or is this a mall crawler?
 

Roky

Well-Known Member
First Name
Roky
Joined
Oct 4, 2018
Messages
3,919
Reaction score
11,282
Location
North Central Florida
Vehicle(s)
2018 JLUR
Build Thread
Link
Vehicle Showcase
1
Would the front and rear both rub? Could I do the trick of adjusting the steering stop that is suggested in another thread.
The front wheels only when turned full lock. No problem with rear wheels. You could adjust the steering stops out, but I’m not sure if they will adjust far enough. I would do 4.5” backspace, the tires won’t stick out that bad, besides it will give it a better stance, IMO.
 
OP
Thashef

Thashef

Well-Known Member
Joined
Jul 14, 2018
Messages
87
Reaction score
31
Location
Northern NJ
Vehicle(s)
2018 JLU Sahara - Bright White
  • Thread starter
  • Thread Starter
  • #6
The front wheels only when turned full lock. No problem with rear wheels. You could adjust the steering stops out, but I’m not sure if they will adjust far enough. I would do 4.5” backspace, the tires won’t stick out that bad, besides it will give it a better stance, IMO.
Thanks!. I have 4.5" now and don't mind it. So I'll just to get Amazon to replace the wheels with 4.5 version.
 

Fire Burns

Well-Known Member
First Name
Fire
Joined
Oct 15, 2018
Messages
891
Reaction score
885
Location
CA
Vehicle(s)
2018 JLUR 3.6; 2006 Chrysler 300c SRT-8
@Roky

Well I'm stuck with my 5 inch backspaced (0 offset) 37-12.50R20s. Too late to buy some other type of wheel. Is rubbing going to be bad bad, or just bad? In other words will I feel it and be able to back off and just not turn as hard, or am I going go start breaking things? Still a noob when it comes to wheeling and about to be purchasing 2.5 in Metalcloak Gamechanger.

Also at 0 offset I'm already sticking out a bit enough that 1.75 in wheel spacers would be far too much negative offset.

Yeah, I know, please don't ding me for my 20s...

2018 Rubicon, if that helps...
 
OP
Thashef

Thashef

Well-Known Member
Joined
Jul 14, 2018
Messages
87
Reaction score
31
Location
Northern NJ
Vehicle(s)
2018 JLU Sahara - Bright White
  • Thread starter
  • Thread Starter
  • #9
Just talked to RK and they said that the rubbing is only on full lock. He said it’s going to happen for sure but it won’t be terrible. They suggested that I just try it
 

Fire Burns

Well-Known Member
First Name
Fire
Joined
Oct 15, 2018
Messages
891
Reaction score
885
Location
CA
Vehicle(s)
2018 JLUR 3.6; 2006 Chrysler 300c SRT-8
Just talked to RK and they said that the rubbing is only on full lock. He said it’s going to happen for sure but it won’t be terrible. They suggested that I just try it
So by that standard. Me with 4.5" backspace on a Rubicon should be even less of a problem than your 5.5" backspace on a Sahara.

I hope...
 

Roky

Well-Known Member
First Name
Roky
Joined
Oct 4, 2018
Messages
3,919
Reaction score
11,282
Location
North Central Florida
Vehicle(s)
2018 JLUR
Build Thread
Link
Vehicle Showcase
1
@Roky

Well I'm stuck with my 5 inch backspaced (0 offset) 37-12.50R20s. Too late to buy some other type of wheel. Is rubbing going to be bad bad, or just bad? In other words will I feel it and be able to back off and just not turn as hard, or am I going go start breaking things? Still a noob when it comes to wheeling and about to be purchasing 2.5 in Metalcloak Gamechanger.

Also at 0 offset I'm already sticking out a bit enough that 1.75 in wheel spacers would be far too much negative offset.

Yeah, I know, please don't ding me for my 20s...

2018 Rubicon, if that helps...
It won’t be real bad, just turn your stops out some and try and avoid full lock when turning. You’ll be able to manage it I think. It’ll just rub the lca, no threat of puncture or anything like that. It also helps being a Rubi.
I’d say run it for a while, worse case you have to touch up lca with rattle can once in a while.
 

Roky

Well-Known Member
First Name
Roky
Joined
Oct 4, 2018
Messages
3,919
Reaction score
11,282
Location
North Central Florida
Vehicle(s)
2018 JLUR
Build Thread
Link
Vehicle Showcase
1
@Roky

Well I'm stuck with my 5 inch backspaced (0 offset) 37-12.50R20s. Too late to buy some other type of wheel. Is rubbing going to be bad bad, or just bad? In other words will I feel it and be able to back off and just not turn as hard, or am I going go start breaking things? Still a noob when it comes to wheeling and about to be purchasing 2.5 in Metalcloak Gamechanger.

Also at 0 offset I'm already sticking out a bit enough that 1.75 in wheel spacers would be far too much negative offset.

Yeah, I know, please don't ding me for my 20s...

2018 Rubicon, if that helps...
I just re read your post, you won’t rub on MC control arms, they bend inward, RK is the ones that will rub since they’re bent up for clearance.
 

Fire Burns

Well-Known Member
First Name
Fire
Joined
Oct 15, 2018
Messages
891
Reaction score
885
Location
CA
Vehicle(s)
2018 JLUR 3.6; 2006 Chrysler 300c SRT-8
I just re read your post, you won’t rub on MC control arms, they bend inward, RK is the ones that will rub since they’re bent up for clearance.
Thanks @Roky - Metalcloak for the win!
Sorry @Thashef for hijacking.

This is something I have been wondering about for some time. Metakcloak still does recommend < 4.5" backspace for some reason, so I have been nervous.
 

psdtime

Well-Known Member
First Name
Tom
Joined
Nov 21, 2019
Messages
314
Reaction score
262
Location
California
Vehicle(s)
2005 LJ Rubicon, 2016 Ram 2500 CTD, 2020 JLRU
Vehicle Showcase
1
One thick washer on the steering stop solved my rubbing issue. I was only rubbing on the side wall tread. This is with 5.77" back spacing (+25) offset on 8.5" wheel with 35's. It only rubbed the sidewall tread that almost all new AT and MT tires have. I did have the same tires on 17x9 4.75 backspaced (-6 offset) wheels and they didn't rub. I prefer the tucked in look much more so I went with AEV wheels. At this point I would replace the suspension parts before replacing the wheels if need be, but I think I solved the problem with the washer since it only seemed to rub on the lower control arm and it was minimal.

Edit: I do have a Rubicon BTW
 

Roky

Well-Known Member
First Name
Roky
Joined
Oct 4, 2018
Messages
3,919
Reaction score
11,282
Location
North Central Florida
Vehicle(s)
2018 JLUR
Build Thread
Link
Vehicle Showcase
1
Thanks @Roky - Metalcloak for the win!
Sorry @Thashef for hijacking.

This is something I have been wondering about for some time. Metakcloak still does recommend < 4.5" backspace for some reason, so I have been nervous.
It’s just the sweet spot for rims with a lift, to ensure they don’t rub anything while wheeling.
 

Advertisement




ATO4x4
 



Advertisement
Top