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question about new rims and 285's

04Z

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04Z New Member

04Z

Posted
Posted

Here is what I have: 04 Z71 ecsb 1/2 ton

 

I would like to get some new wheels and tires in the very near future and I have looked and looked and cannot find anywhere that it says explicitly what backspacing I need to stay within the non rub region for 285's. I have been told that it is somewhere around 4.5".

 

Now with that said, I would like for my tires to stick just a tad bit more than stock because I have fender flares and I would like the tires to match up to the flares a bit better.

 

If anyone has any suggestions or opinions I would greatly appreciate it. I am definately getting 16x8 wheels and BFG AT's assuming they are fairly quiet for an AT tire.

 

Right now I have found a 16x8 wheel with 4.25 BS and -5mm offset. Will these work and not rub with a lil tb crank?

 

Sorry for the book and thanks in advance.

Wingnut Senior Enthusiast

Wingnut

Posted
Posted

I wish I could tell you what my offset is.

 

But if it sets the tires out any further than factory, and you're running 285s, you might have to trim the airdam just a tad.

 

Click the link for the '02 in my sig, you'll see that they stick out a bit further than stock, and I had to trim my airdam to get the 285/75/r16 Nittos on there. The 285s did NOT rub anything at all when on the stock rims.

Chris97K1500 Enthusiast

Chris97K1500

Posted
Posted

I believe the factory backspacing is 5" with a +offset, not sure the exact number. With that new rim, your rims be sticking out about 1.25" from now, tires, about another 1.5". So you'll probably be gaining about 2.5" (give or take a 1/4"). I wouldn't be surprised if you have to trim a little off the lower airdam like Wingnut mentioned. If you do crank your t-bars up, which I would not do unless you have to, get a re-alignment. Chris

Elwood 2000 Senior Enthusiast

Elwood 2000

Posted
Posted

I wish I could tell you what my backspacing is, but I have 16x8 AR rims with 285's and NO problems with rubbing, especially on the front. I am closer on the rear of the inner fender than the front. Look on the AR website, they have a chart that tells you what the backspacing and offset is for the rims that are model specific.

 

picture of my truck

 

wheel/tire picture

 

Also, I highly recommend the BFG AT tires. I have 30k on mine right now and there is at least 50% tread remaining. They are quiet, provide excellent traction, ride and drive and are wearing very evenly. I rotate about every 6-9k miles.

scottlambson Enthusiast

scottlambson

Posted
Posted

The 16 X 7 OEM wheels have a +31mm offset or ~5" backspacing. The 17 X 7.5s also have a +31mm offset giving them ~5.25" backspacing.

 

I have the BFG's on my landcruiser in a 285/75/16 on a set of stock 16 X 8's. They are great tires and even less noisy then the Goodyear RT/S street tires that were on it for awhile. Low wearing tires but expensive. Decent street tires although they do pick up rocks and fling them but most good AT tires do.

scottlambson Enthusiast

scottlambson

Posted
Posted
The 16 X 7 OEM wheels have a +31mm offset or ~5" backspacing.  The 17 X 7.5s also have a +31mm offset giving them ~5.25" backspacing.

 

I have the BFG's on my landcruiser in a 285/75/16 on a set of stock 16 X 8's.  They are great tires and even less noisy then the Goodyear RT/S street tires that were on it for awhile.  Low wearing tires but expensive.  Decent street tires although they do pick up rocks and fling them but most good AT tires do.

 

 

 

 

Oopps, I did the backspacing calculation based on a .25" rim lip. I measured both wheels last night and it's more like .50" or just a hair more. So 5.5" backspacing on the 17's and 5.25" for the 16's on the NBS wheels.

Shu Enthusiast

Shu

Posted
Posted

I have a 2005 1500 4x4 which came with the 17 inch factory steel wheels. THey are 7.5" wide and had a 29 mm offset. I also went with a 285/75R16 tire (Nitto Terra Grapplers (awesome tires BTW)). I too wanted the tires to set out a little ore than factory. I ended up with a set of Eagle Alloys 102 (go to www.aewheel.com to see). 16"X8" wheels with 3 5/8" BSM and -20mm offset. Perfect fit. I have some pictures at home and I will try to post them tonight so you can see if that is the look you are after. BTW I do not have wheel flares, so keep that in mind. I'm looking for a great used set of white wheel flares because I think that will finish the look I am after. To make this combination work, you will ahve to crank up your torsion bars, slighlty trim the lower front airdam, and use a few cable ties to pull the inner fenders back a little.

scottlambson Enthusiast

scottlambson

Posted
Posted

FYI, I threw some 16 X 8's with a 265 on them and a 4.5" backspacing 0mm offset on my truck last night. It sticks out almost two inches further. I measured side to side and it cuts down the clearance inside the fenderwells ~3/8" from the stock 7" wheels and same size tires in the front wheel wells on my Z71 NBS.

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