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  #1  
Old March 2nd, 2018, 18:49
Lake919 Lake919 is offline
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Requirement to run 33x12.50/15

Hey guys, Iím getting ready to put a long arm system on my 95 XJ, I want to run 33x12.50ís on 15 inch steel wheels. What size rim would you recommend? Do I need spacers? Thanks.
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  #2  
Old March 2nd, 2018, 18:59
GreaseMonkey17 GreaseMonkey17 is offline
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Re: Requirement to run 33x12.50/15

15x8 allows for a better seat on the beat when aired down . 3.75 back spacing would be my reccomendation and that’s what I will be running no on the spacers .
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Old March 3rd, 2018, 10:53
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sinat01 sinat01 is offline
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Re: Requirement to run 33x12.50/15

at a minimum 15x8 with 4" backspacing. I have 33x10.50R15s on the stock 5 spokes (15x7 w 5.5" backspacing) and their is about 3/4"-1" between my sidewall and leafspring
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Old March 3rd, 2018, 16:11
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DutchVDub DutchVDub is offline
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Re: Requirement to run 33x12.50/15

Requirement to run 33's on an XJ? A NHRA spec roll cage, or it'll fold like a taco.
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  #5  
Old March 3rd, 2018, 16:27
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sinat01 sinat01 is offline
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Re: Requirement to run 33x12.50/15

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Originally Posted by DutchVDub View Post
Requirement to run 33's on an XJ? A NHRA spec roll cage, or it'll fold like a taco.
That's only if you take the doors off
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  #6  
Old March 4th, 2018, 06:01
Lake919 Lake919 is offline
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Re: Requirement to run 33x12.50/15

No it only folds like a taco if you put a dual battery setup in it. The XJ cannot hold that kind of weight on the flimsy unibody.
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Old March 5th, 2018, 10:44
burntkat burntkat is offline
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Re: Requirement to run 33x12.50/15

I'm running Clayton's longarms on my 90, 33X12.5X15 tires on 15X8 wheels. 4" BS, IIRC.

Can't say that would be better than 3.75" BS, but it works. I have done moderate fender trimming and run BW fender flares . I am going to be going to the flatfender steel flares after a bit. I am not impressed by the $400 plastic flares, have already ripped a few off the vehicle.
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Old March 5th, 2018, 13:53
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Re: Requirement to run 33x12.50/15

OP are you asking for street-only, moderate trails, or hard wheeling? Articulation required will determine how much space you need between the tires and fender lip
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  #9  
Old March 5th, 2018, 16:26
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4x4JeePmaNthINg 4x4JeePmaNthINg is offline
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Re: Requirement to run 33x12.50/15

on my 99 i went with 15x8 with 4'' back spacing, that seems to work rather well for turning, plan on trimming if you havent.

for what its worth i would recommend the proper backspaced wheels (3.75-4) rather than spacers.
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Old March 5th, 2018, 19:08
Lake919 Lake919 is offline
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Re: Requirement to run 33x12.50/15

It won’t see hard wheeling often. I will be running the foothills and mountains of northern AL and TN and next year will be making a trip to Moab with my buddy.
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Old March 7th, 2018, 10:11
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clydefrog clydefrog is offline
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Re: Requirement to run 33x12.50/15

I have 3.75" BS with 33x12.50x15 and a RC long arm kit. Also running a narrower Ford 8.8 in the rear. No problems. ~4" lift with heavy trimming of all four fenders.
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Old March 8th, 2018, 09:14
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Re: Requirement to run 33x12.50/15

keeping it in the parking lot? nothing.

flexing it? considerable trimming AND bumpstopping
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  #13  
Old March 8th, 2018, 11:46
Rockwood Rockwood is offline
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Re: Requirement to run 33x12.50/15

3" short arm lift and 33x12.50 on my XJ. Needed the full length Daystar bumpstops to keep them from eating themselves on the inner fenders flexed out. I drilled holes in the ends of the stops to soften them a little as we do a lot of high speed running in the desert here.
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Old March 9th, 2018, 08:16
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denverd1 denverd1 is offline
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Re: Requirement to run 33x12.50/15

Quote:
Originally Posted by Rockwood View Post
3" short arm lift and 33x12.50 on my XJ. Needed the full length Daystar bumpstops to keep them from eating themselves on the inner fenders flexed out. I drilled holes in the ends of the stops to soften them a little as we do a lot of high speed running in the desert here.
like that idea! going to 6.5" and 35" soon. will keep that in mind, I know I'll need to redo bumps
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Old March 9th, 2018, 13:31
ID96XJ ID96XJ is offline
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Re: Requirement to run 33x12.50/15

Use Prothane coil inserts instead.
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