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37s with only a 2.5BB?

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Old 07-26-2009 | 08:18 PM
  #21  
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all i know is i'm becoming inspired. i'll skip the 35's and go to 37's
Old 07-26-2009 | 10:36 PM
  #22  
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I'd go with 37's. The biggest mistake I made on my 4 dr was going with 35's. A 4 dr NEEDS 37's. I'm even considering 38's. If I felt like dropping the bucks on 60's now I'd go with 39's or 40's. Maybe post Obama if he doesn't succeed in killing the economy.
Old 07-27-2009 | 06:19 PM
  #23  
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Originally Posted by chuck45
I'd go with 37's. The biggest mistake I made on my 4 dr was going with 35's. A 4 dr NEEDS 37's. I'm even considering 38's. If I felt like dropping the bucks on 60's now I'd go with 39's or 40's. Maybe post Obama if he doesn't succeed in killing the economy.
What 38's were you looking at?
Old 07-27-2009 | 06:57 PM
  #24  
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How necessary is it to beef up the axles especially on a rubi?

I had 33s on my TJ and was about to jump to 35s before it was stolen, but the more i see this set up I am thinking about going straight to 37s on my jk rubi; however, i still want to do some mild offroading as I won't have all the funds for sleeves and gussets right away.

Planman - did you change out driveshafts or are you running the stockers?
Old 07-27-2009 | 09:43 PM
  #25  
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Originally Posted by style_front
What 38's were you looking at?
The KM2 38x14.50x17. I have a certificate from BFG for a set of 4 tires (up to 17" but excluding Krawlers and non DOT tires). The 37's are probably the prudent choice reliability wise. If 60's were immenent (not likely in our current economy) I'd do the 40's. The 37's would work fine on my 8.5" wheels but the 38's require 10-12" wheels and I don't feel like buying new wheels right now. I wish the 37's where 13.50 instead of 12.50. Decisions, decsions............
Old 07-27-2009 | 10:52 PM
  #26  
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I just flexed mine out today to see where I rub prior to cutting. It rubs bad on the front bumper and rear pinch seam and even the rear bumper. I just bought a sawzall so cutting is in the near future once I have the alloted time. (12 hour shifts and no days off sucks)
Old 07-28-2009 | 06:09 AM
  #27  
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Default Is the axle that weak?

Alright so here is what I'd like to know...Why do you have to brace the D30 so much when getting bigger tires? The tires do not change the amount of weight that is on the front axle that much do they? Granted the axle is higher in the air and has a little more stress to turn bigger tires left and right but is the axle actually that weak? If I sleeve the axle does it need to be gusseted? If I gusset the front does it need to be sleeved? The reason I ask is I am going to cut my fenders and (hopefully) put 37's on but I have a 4" lift.
Old 07-28-2009 | 09:14 AM
  #28  
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Originally Posted by planman
To run 37s, locked, offroad, I think you should beef things up. I did front & rear chromoly axle shafts. Also on the front axle, I did sleeves, axle C gussets, lower control arm skids (with extra welds on the stock bracket), and gusseted/boxed in the axle side front trackbar bracket.

My driveshafts have held up fine with only the 2.5" lift and 37s.

Here's a budget for 37s (just an example):
  • 5 Goodyear MTRs (non-Kevlar) 37x12.50x15, $256 each, $1280 with free shipping, (PM or email the Discount Tire Direct rep on this forum for a greater discount)
  • 5 Cragar Soft 8s, 15x8, 4" backspacing, CRR-3975850, and center caps CRR-29270-1, $280 shipped from summitracing.com
  • Trim stock flares flat, $20 for door edge material
  • Teraflex 2.5" coil lift with shocks, $680 from Northridge4x4
  • M.O.R.E. 1" body lift, $140 from Northridge4x4
  • Regear to 5.13s, $1200 (parts ordered from Northridge4x4, labor local)
  • Rock Hard EVAP skid, $100 from Northridge4x4
  • Rock Hard Engine skid, $380 from Northridge4x4
  • Off Road Evolution axle sleeves, C2 gussets, & lower control arm skids, $250 from Northridge 4x4.
  • Rock Krawler front trackbar gusset kit, $25 --Northridge4x4 can probably get it for you.
  • Cut 2" off rear of stock Rubi Rocker guard, $0
  • Fold over or cut rear pinch seam, $5 for a can of black spray paint
  • Stubby your stock front bumper, $0
  • Woods steering stablizer relocation bracket, $39 from jeepswag.com
  • Rear bumper/tire carrier capable of a 37" tire, about $1000
  • AEV ProCal programmer, $130 from Northridge4x4
  • Front and rear chromoly axle shafts, $1100 from Northridge4x4
  • CB, antenna, mount, cable, etc., $130


Offsets:
  • Sell stock tires and wheels, $600

Total budget to run 37s on a Rubi (sample build): about $6k if you do your own installs and have a buddy who can do the welds on the front axle sleeves, gussets, etc.

You could do it over time in this order:
  1. Lift, body lift, trim flares, trim rocker guard, fold over pinch seam, stubby front bumper, CB.
  2. Tires & wheels (run without a spare until the next step)
  3. Rear bumper/tire carrier
  4. Sell stock wheels and tires
  5. Gears and AEV ProCal
  6. Front axle reinforcements (sleeves, gussets, etc.) and stabilizer relocation bracket
  7. Engine skid & EVAP skids
  8. Axle shafts

Then, move on to better front bumper, winch, etc., etc.
Fantastic write up!!

Ive put in red what I would guess would be able to be removed from the budget/list if you were only doing 35's. Please correct as you see fit, as I'm trying to make the decision between 35s and 37s as well.
Old 07-28-2009 | 10:32 AM
  #29  
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Originally Posted by planman
Thanks.

If you are going to run 35s and wheel it hard, I'd only drop:
  • M.O.R.E. 1" body lift, $140 from Northridge4x4
  • Off Road Evolution axle sleeves--I would still do the gussets and lower control arm skids.
  • Cut 2" off rear of stock Rubi Rocker guard, $0
  • Fold over or cut rear pinch seam, $5 for a can of black spray paint
  • Front and rear chromoly axle shafts, $1100 from Northridge4x4


However, you could also do a less expensive rear bumper tire carrier. You could do the OrFab rear tire carrier without an aftermarket rear bumper.

If you have a Dana 30, you'd want front chromoly shafts, but would be fine with the stock axle shafts with a front Dana 44. If you don't have lockers, you might want to add lockers at the same time as the regear.

You could do the 1" body lift and keep the stock flares uncut.

If you don't wheel it in the rocks you could skip the engine skid and the EVAP skid.

If you don't wheel it hard, you could skip the front axle C gussets, but I'd still do the Rock Krawler trackbar bracket gussets.
Again, thank you.

I have a 4 dr Rubicon, and right now its a 95% street rig. I only run an occasional trail, and its usually fairly light.
Old 07-28-2009 | 06:16 PM
  #30  
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From: Moo Town
Default Great info Planman, thanks!

Planman, thanks for all of the information that you've provided us. I do however have a question re: your flares. In your older pictures you were running Xenons and in the later you're running trimmed factories. Any reason for the change? Did the wife's rig get the xenons?

Just curious as I'm running trimmed factories now but am not really satisfied with how "thin" they look (I know, I know.. looks aren't that important) and was considering the more substantial looking Xenons.

Otherwise my setup is identical to yours save that I have a Rubi Unlimited..

Thanks!


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