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  #1  
Old 09-08-2013, 07:55 AM
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WA F250 WA F250 is offline
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Wheel help needed

Hi Guys,
Need some help in making sure I order the correct size rims this time after my last fiasco.
Looking at 16x8,16x9 or 16x10 to run 35's or 315's rubber. I am installing a lift kit but I am confused with the backspacing offset issue. the question is will a 4.5" backspacing let me run these tyres without any rubbing on the springs?(present problem with said tyres on stock rim, illegal I know)
From what I understand with a 8" rim I will need a 0 offset, a 9" needs -12 offset and with the 10" I will need a -25 offset. If I go more on the negative offset it will only push the wheels out wider? I am running 2" pocket flares so I can run a little wide.
Anyone having any issues with their wheel set up or not and wouldn't mind letting me know their detailed sizing? I am going to order out of the states so I can get it wrong twice

Cheers, Glenn
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Old 09-09-2013, 05:30 AM
SSSimon SSSimon is offline
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I'm runnin 20x9" rims with a -12 offset. The inspection station here said this was the maximum that would pass as regs here limit track increase to a max of 1" above stock.

With 305/55 20 tyres on full lock the front tyres will just rub on the mudflap mounted on the inside of the guard, so with my 4" lifted truck I could not go any wider on tyres or have a more neg offset rims without having more lift.
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MODS: Hutch,ICboots,plenum inserts,IH uppies,G2WW,HPx,AIH delete,EBPV delete,hi flow outlet,CCV mod,OCR,Zoodad,6637,4" TB exhaust,JW VB,coolant filter,FRx,'05 HD lights with switch bypass relays,B20 ready fuel system(3 filters).Stratos truck seats,rear head rests,LED running lights, 285-75-16s. Gauges:EGTx2,Boost,Trans temp,Fuel pressure,Eng oil temp, Coolant temp, Edge CS, PHP tuner
NOT done: big oil, big brakes, big turbo. Next Mods? None - I'm done!
Australia: where Mechanics use spanners & Plumbers use wrenches
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Old 09-09-2013, 06:03 AM
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WA F250 WA F250 is offline
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Simon, Thanks for that. We have the same laws in WA. so if I read it right 305's on a 9" rim with a -12 offset clear the springs. I am going to assume if I use 16x9 with a -12 then 305's will fit? just need to find out if 315's or 35's will still clear the springs.

cheers
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Old 09-09-2013, 06:08 AM
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What year do you have?
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Old 09-09-2013, 08:27 AM
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WA F250 WA F250 is offline
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Ozdat it is an Australian 2004 4x4 crew cab, 7.3 auto. It is the same platform as the US 99-03 F-250.
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Old 09-09-2013, 08:40 AM
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18's or 20's would give you less bag on the side wall. On my obs I have 285/75/16's or 33" which I should get away with when I go to license it. 18's would be a nice size for road and off road compromise, and would be the way I would go if I can afford to upgrade to 35's.
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Old 09-09-2013, 09:55 AM
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Ozdat I want to stay with the 16's to make it easier to get spare tyres when touring, plus I like a bit of sidewall, seems to help when airing down for the soft sand.
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Old 09-09-2013, 11:10 AM
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Quote:
Originally Posted by WA F250 View Post
Simon, Thanks for that. We have the same laws in WA. so if I read it right 305's on a 9" rim with a -12 offset clear the springs. I am going to assume if I use 16x9 with a -12 then 305's will fit? just need to find out if 315's or 35's will still clear the springs.

cheers
Off the top of my head, the stock wheels are 7" wide, with +6mm offset.

To stop rubbing, it doesn't matter the rim width, just the offset (I think you might be getting your offset/backspacing confused?). To clear 315''s/12.5's, 0mm offset will do enough. (although if you run very low pressures, -6mm might be needed, just in case). 305's will easily clear with 0mm offset.

If you want to allow for 325's/13.5 in the future, you will need -12mm offset.

Based on that offset, you can look at this chart, to get your backspacing based on the wheel width you want:
Click the image to open in full size.
Quote:
Originally Posted by ozdatman View Post
18's or 20's would give you less bag on the side wall. On my obs I have 285/75/16's or 33" which I should get away with when I go to license it. 18's would be a nice size for road and off road compromise, and would be the way I would go if I can afford to upgrade to 35's.
All the landcruisers etc. run 16's - so much easier to find tires (and if you buy tires locally... cheaper)

Not to mention, wider footprint when aired down in our soft sand, less likely to "curb" your rims etc. The only benefit of running larger wheels is for looks/clear bigger rotors. That said, I run 18's... (275/70 R18's)
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Old 09-10-2013, 05:10 AM
SSSimon SSSimon is offline
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My truck is a 2005 CC 7.3 auto 4WD with 4" lift. The rims American Racer Wolverine 20x9 with 4.5" backspace & -12 offset. The 305/55/20s (tyre height 32") do not touch the springs.

I'm thinking of going to 16x8 4.5" BS, zero offset, to give lots of rim & tyre options. The widest popular tyre seems to be 285/75/16 - tyre height of 32.8" seems reasonably close to what I'm running now.
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MODS: Hutch,ICboots,plenum inserts,IH uppies,G2WW,HPx,AIH delete,EBPV delete,hi flow outlet,CCV mod,OCR,Zoodad,6637,4" TB exhaust,JW VB,coolant filter,FRx,'05 HD lights with switch bypass relays,B20 ready fuel system(3 filters).Stratos truck seats,rear head rests,LED running lights, 285-75-16s. Gauges:EGTx2,Boost,Trans temp,Fuel pressure,Eng oil temp, Coolant temp, Edge CS, PHP tuner
NOT done: big oil, big brakes, big turbo. Next Mods? None - I'm done!
Australia: where Mechanics use spanners & Plumbers use wrenches
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Old 09-11-2013, 02:57 AM
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WA F250 WA F250 is offline
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Ok, the wheels are their way to USAtoAUS. I ended up getting these Moto's from eBay. 16x9 with a 4.5 back space and -12 offset. Can't wait till they get here!! Got a good deal 6 wheels shipped with centre caps and lug nuts US$720. I have been assured that they will work?? And the centres have the pop off cap for accessing the hub lock.
Are our wheel studs 1.5 or 2.0 thread? they are sending me 2.0 for free, I guess if they are wrong it aint much to get the right ones.
16 17 18 20" inch Moto Metal MO 951 MO951 Wheels Rims | eBay

Thanks for all the input!!!!!!
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Old 09-11-2013, 03:49 AM
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Including shipping? Wow that's a good price. Goes to show how much markup there is on stuff in West Aus.

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Old 09-11-2013, 04:11 AM
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WA F250 WA F250 is offline
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OzDat that is only shipping to Battle Ground Washington state USA. the freight forwarder will send them to West Aus by sea freight. From the website 5+wheels shipping is around $200'ish. This is my second shipment of parts thru USAtoAUS and I can't rate them high enough. you just have to wait 6-8 weeks to get your hands on your kit. I have a set of 4" Pro-Comp springs coming too total cost for the 4 is US$560 then my freight on top. I refuse to by anything in Aus unless it is a small item or I need it ASAP! The stealership ain't getting my money!!
And I am waiting to get a box with the Riffraff yellow tape on it too!!!!
X-Mas has come early for my truck
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  #13  
Old 09-11-2013, 04:19 AM
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I was pricing tyres a few months back and even with $500 postage it was cheaper to by bridgestones from the U.S.
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  #14  
Old 09-11-2013, 05:03 AM
SSSimon SSSimon is offline
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I had Clay ship my MBRP 4" system to USAtoAUS, then got it delivered to my house via courier.

I will definitely ship my new wheels & tyres over that way. If you plan ahead & use this sort of service you can save $1000's.

My last box with the yellow RR tape was my turbo rebuild kit - via USPS standard service was here in 7 days.
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MODS: Hutch,ICboots,plenum inserts,IH uppies,G2WW,HPx,AIH delete,EBPV delete,hi flow outlet,CCV mod,OCR,Zoodad,6637,4" TB exhaust,JW VB,coolant filter,FRx,'05 HD lights with switch bypass relays,B20 ready fuel system(3 filters).Stratos truck seats,rear head rests,LED running lights, 285-75-16s. Gauges:EGTx2,Boost,Trans temp,Fuel pressure,Eng oil temp, Coolant temp, Edge CS, PHP tuner
NOT done: big oil, big brakes, big turbo. Next Mods? None - I'm done!
Australia: where Mechanics use spanners & Plumbers use wrenches
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  #15  
Old 09-11-2013, 05:24 AM
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WA F250 WA F250 is offline
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Simon, I am looking at getting the Hydrachip too. anything you have found that I would need to watch?
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Old 09-11-2013, 05:24 AM
 
 
 
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