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big tyres and leaf springs????

General Tech Talk

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big tyres and leaf springs????

Post by GQ Bear »

My mate's got a 75 series ute which he will be running 35's on. The problem is that when he full locks with 33's the tyres scrub-out on the leaf springs, the 35's will be worse.

He has extended shackles giving about a 3" lift and has moved the front axle forward about 35mm so clearance is not an issue. He currently runs offset 15x10" rims (i'm not sure how much offset, but a fair bit)

He was going to use wheel spacers but was strongly advised against them. What are others doing to combat this problem on leaf-sprung trucks? And what are thoughts on wheel spacers?
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Post by frigga 40 »

i had a sprung over 40 series and i ran 38.5x15 claws and i used snake racing 2 inch wheel spacers for front and 3 inch in the rear and never had a problem with the wheel spacers just broke the rest of the driveline................ :lol:
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Post by Rhysta »

I have a mate with a 75 ute.He is running 35 x 12.5 muds with just a 2" body lift.

All he did was screw in the stops for the full lock to stop it rubbing.

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Post by ljxtreem »

Could also get rimms with more offset or get the rims you have offset more.

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Post by V8 Middy »

WHat is the current backspace on his rims? I'm trying to combat the same problem.
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Post by mtb_man »

Tell your mate to do a coil conversion.

Hey Presto, no more rubbing on the leaf... :D
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Post by evil_hitman »

Had the same problem on my hj75 troopy. Just readjusted the steering stops. didn't need much (34x10.5 Simex JT2's)

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Post by ljxtreem »

mtb_man wrote:Tell your mate to do a coil conversion.

Hey Presto, no more rubbing on the leaf... :D
Yes, thats a cheep way of solving the problem :armsup: :finger: :)

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Post by largesuzy »

4 ways to fix it

1. more rim offset
2. spacers
3. adjust the steering lock so the wheels turn less
4. remove leafs and go to coils
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Post by NMK »

i have a 75 on 35's with a three inch lift and it dosn't rub anywere but it has a horible turning circle and it has 8i rims
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Post by balzackracing »

incorrect offset wheels. you require a minimum of 3 and 5/8 inch backspace for a 75 series which is what most wheels for crusiers are. I would personally change the rim offset to 2 and 5/8 or 1 and 5/8. fourbys make some sweet custom rims with or without external beadlocks if your from brisbane area. You will also find you have to relocate your front diff further forward to clear the rear of the wheel arch. i shifted mine 40mm to fit a simex 36" et2's but you could get away with only 25mm. http://www.outerlimits4x4.com/PHP_Modul ... c&start=30
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Post by V8 Middy »

Balzackracing:

By my calculations you are running approx 2.1in backspacing at the moment right? But you think you could get away with 2.75in?
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Post by baddboy »

Do a thread search. this has been done heaps!
75 series ute. 8 inch lift, Drop shackles, Shock hoops, ladder bar, Ubolt flip, 3 inch wheel spacers, intercooled turbo, winch, twin detroits, 35" Mtr's, etc, etc.
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Post by balzackracing »

1 and 5/8 inch backspace
HZJ75, 3in spring,2in cab,drop shackles,shock hoops and inverted shocks, fourbys 15x10 beadlocks, 36x12.5x15 simex ET2,
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Post by Ruffy »

Hey Bear, I've got 30 mm extra off set rims on the 60 to run the Q78's. The still rub a little though. I'd be looking at off set rims for sure. The dam things don't turn real well without screwing your lock stops out let alone if you do.
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Post by V8 Middy »

Just phoned Pro Comp and found out that their extra offset rims have a 2.5in backspace, not a crazy 1.25in as the website would suggest
73 Series Middy Cruiser 308 VN V8 OME 2in Susp lift 2in Body lift 35in Pro Comp X-Terrains
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