What's the most backspacing you've seen?

[89Vette]

I know this can/will depend on the overall diameter and thickness of the tire/wheel combo. I'm looking at buying/mounting an 8.5 or 9" tire/wheel combo. I'm trying to determine how much of it I can shove back into the wheel wells.

Specifically, the wheels I'm looking at have positive offsets in the 10mm to 30mm range. The larger 30mm offsets have 6" or more backspacing with the wheel width in question. Since it looks (to me) like the stock backspacing is 4.75-5", I'm trying to figure out where backside contact occurs.

My tires will be between 30-31.5" in diameter.

Thanks
gp

BTW,,,Yes, I'm a new owner!

[crotchrocket]

On the standard rims with no spacers you can mount a 285 75 16 tyre and it wont stick out beyond the wheel arches. you will need to attack the front cladding a little and the inner wheel arch for steering but the back has no issues.

Go through the wheel and tyre thread, it has most combinations available and all the info on the different offset combo's


This does look lifted though

http://www.vehicross.info/gallery/data/500/medium/grass_p_3-4.jpg

[crotchrocket]

Or go the other way and just put all the tire outside the wheel arch :D


http://www.vehicross.info/gallery/data/500/medium/CIMG4391.JPG

[etlsport]

I would try talking to marlin or littlebeast. Iirc they bothe have larger width rims with close to a factory offset, so that should at least be a little more backspacing than factory.

[Marlin]

I would try talking to marlin or littlebeast. Iirc they bothe have larger width rims with close to a factory offset, so that should at least be a little more backspacing than factory.

Yep, you got it. I got as close to factory offset as I could.
Here is where I started, and since then, I have kept the same wheels as shown here, but went up to a 34"x11.5" tire. I also lowered the front end down to almost stock height, looks funny, but improved the offroad handling drastically. My VX just sits in the driveway most of the time, less than a tank a gas through it a month.
http://www.vehicross.info/gallery/data/2/AFTER_LIFT.JPGhttp://www.vehicross.info/gallery/data/2/FLEX.JPG
Ultra Goliath wheels: 108mm bore
6 on 5.5, 18x9, 5.5" back space, +12mm offset
General Grabber AT2 275/65/18 P-metric
OME919 springs
14 turns on t-bar

[89Vette]

Thanks guys.

One thing that confuses me is the stock wheel is listed with 38mm offset. Since it's a 7" wheel, the center point would be 3.5". 38mm is right at 1.5".

1.5" + 3.5" = 5" backspacking for the OEM wheel. (According to my calculations).

But this (http://www.vehicross.info/gallery/data/515/tech-wheeloffset.gif) chart shows it should be 5.5" backspacing. The chart looks wrong.

Or I don't understand something.



(I also did a search on backspacing. I looked thru most of the threads with that term. Not a single post mentioned OEM backspacing. Since my new VX no longer has stock wheels, I cannot verify what it SHOULD be.)

[Ldub]

If it's of any help, my Centerlines have 5" of backspacing on an 8" wide wheel.

[vt_maverick]

Thanks guys.

One thing that confuses me is the stock wheel is listed with 38mm offset. Since it's a 7" wheel, the center point would be 3.5". 38mm is right at 1.5".

1.5" + 3.5" = 5" backspacking for the OEM wheel. (According to my calculations).

But this (http://www.vehicross.info/gallery/data/515/tech-wheeloffset.gif) chart shows it should be 5.5" backspacing. The chart looks wrong.

Or I don't understand something.



(I also did a search on backspacing. I looked thru most of the threads with that term. Not a single post mentioned OEM backspacing. Since my new VX no longer has stock wheels, I cannot verify what it SHOULD be.)

JUST DO IT! Patience and thoughtfulness != timely mods.

***WINNER: Least helpful post in a mod thread Category*** :p

[89Vette]

Here's my real questions:

1) Would a 20x9" dub with 10mm offset stick out 2" further than stock?

2) Would the same wheel with 30mm offset have too much backspacing?

10 and 30mm are the two choices for offset in a wheel I like

[89Vette]

JUST DO IT! Patience and thoughtfulness != timely mods.

***WINNER: Least helpful post in a mod thread Category*** :p

Ughhh....what's this forum category for? Since it included a GIANT wheel thread, I thought it was the correct location. Is it not?

[vt_maverick]

Here's my real questions:

1) Would a 20x9" dub with 10mm offset stick out 2" further than stock?

2) Would the same wheel with 30mm offset have too much backspacing?

10 and 30mm are the two choices for offset in a wheel I like

1) That's what I get (well 2.1" and change)

2) If I understand the equations correctly, I think that 30mm offset would generate too much backspacing.

[vt_maverick]

Have you ever tried this? Punch in the OEM specs and what you're considering and see if helps you visualize all these numbers.

http://www.rimsntires.com/rt_specs.jsp

[crotchrocket]

***WINNER: Least helpful post in a thread Category*** :p




2829th post in a row....... :D

[89Vette]

2829th post in a row....... :D

Wanna let me in on the joke?

[RamAirZ]

says that VT_Mav provides useless posts, nothing directed at you. We all love VT!

[vt_maverick]

2829th post in a row....... :D

Well let me add another then... :p

[89Vette]

OK., thanks.

Without a specific reply, let me try the question this way....

Is anyone running wheels that have 3/4" more backspacing than stock? Basically, I'm trying to figure out if up to 1" more backspacing (than stock) will fit in the wheels w/o rubbing. For sake of argument, lets say it's with 30" diameter tires.

[etlsport]

From marlins post, his wheels have an inch of back spacing more than factory. He is also running 34" tires. You should be fine

[89Vette]

From marlins post, his wheels have an inch of back spacing more than factory. He is also running 34" tires. You should be fine

Are you SURE about the backspacing? It sounds like you think OEM backspacing is 4.5"? As I posted, 5" is my calculation and 5.5" is what the chart says (that's linked at the beginning of the giant whee/tire thread). IOW, Marlin's backspacing is the same as factory.

OTOH, with 9" wheels, I'd think they'd stick out more!

Marlin, can you confirm your backspacing as compared to factory?

BTW: Is there a (simple) adjustment for wheel lock-to-lock if there's any contact in that regard?

[89Vette]

I also lowered the front end down to almost stock height, looks funny, but improved the offroad handling drastically. My VX just sits in the driveway most of the time, less than a tank a gas through it a month.
Ultra Goliath wheels: 108mm bore
6 on 5.5, 18x9, 5.5" back space, +12mm offset
General Grabber AT2 275/65/18 P-metric


Marlin, you still look way above stock height. With a 31" wheel, mine is sitting WAY further up into the wheel well -- on the front. Mine is further up than your pic on the ramps!

With 12mm offset and 2" more wheel, I gotta assume your tire is sitting more outboard that the two pics in this thread portray.

[Marlin]

Marlin, you still look way above stock height. With a 31" wheel, mine is sitting WAY further up into the wheel well -- on the front. Mine is further up than your pic on the ramps!

With 12mm offset and 2" more wheel, I gotta assume your tire is sitting more outboard that the two pics in this thread portray.

Hold on, read the post, I am at stock height now, or very close to it anyway.
The tires in the pics were only 32" x10.9". Those pics are from 2 years ago when I first lifted the truck and a bunch of other hoohah..

As for the offset and whatnot, this info is straight off the shipping bill for the wheels:
6 on 5.5, 18x9, 5.5" back space, +12mm offset

Here is what the truck looks like now:

http://www.vehicross.info/gallery/data/500/IMGP1718.JPG

The tires do stick outside the cladding an inch or so. Not enough to look silly(for you Tom), but enough give it that wider more aggressive stance.

http://www.vehicross.info/gallery/data/500/IMGP1131.JPG

Yes, you can adjust the steering stops to minimize rubbing. Page 2A-16 in the shop manual. Fairly easy to do. So even if you do get rubbing, you can just set the stops to make it go away.

[Mile High VX]

I"m running a backspacing of -6 on a wheel that's 18x8.5 at stock height and I love the look...had to do some minor cladding trim front and rear, but no rubbing issues lock to lock and I have about 1" of tire outside the edge of the cladding.

http://www.vehicross.info/gallery/data/500/DSCN0022.JPG

http://www.vehicross.info/gallery/data/500/DSCN0028.JPG

http://www.vehicross.info/gallery/data/500/DSCN0027.JPG

http://www.vehicross.info/gallery/data/500/DSCN0094.JPG

[Marlin]

I"m running a backspacing of -6 on a wheel that's 18x8.5 at stock height and I love the look...had to do some minor cladding trim front and rear, but no rubbing issues lock to lock and I have about 1" of tire outside the edge of the cladding.

http://www.vehicross.info/gallery/data/500/DSCN0022.JPG

http://www.vehicross.info/gallery/data/500/DSCN0028.JPG



Your truck looks good! With that little trimming, you are gonna rub if you go wheeling, especially on steep descents. The wheel does move around a bit from front to rear. But I would guess by the pics, your truck is not a wheeling kind of truck:)

My tires do not stick out quite as far as yours, but pretty close.

[etlsport]

I"m running a backspacing of -6 on a wheel that's 18x8.5 at stock height and I love the look...had to do some minor cladding trim front and rear, but no rubbing issues lock to lock and I have about 1" of tire outside the edge of the cladding.


Dont mean to be nitpicky.. but your running an OFFSET of -6.. backspacing would be about 4 inches

offset is measured from the center line of the wheel, backspacing is measured from the back of the wheel

[Marlin]

http://www.vehicross.info/gallery/data/500/IMGP1722.JPG

http://www.vehicross.info/gallery/data/500/IMGP1458.JPG

[VXjunky]

man that looks close to a sidewall puncture

[VX KAT]

man that looks close to a sidewall puncture

That's exactly why he's running the Goodyear Wrangler Kevlar MT/R.

[vt_maverick]

Not to mention why you air down before offroading. Tires will take a lot of abuse/flex at 5-10 PSI.

[Marlin]

The sidewalls on those tires are close to an inch thick, and if I somehow do manage to damage one, they get replaced for free:)

[tom4bren]

The tires do stick outside the cladding an inch or so. Not enough to look silly(for you Tom), but enough give it that wider more aggressive stance.

I have no response to that. (Can't let Ash 1 up me on useless posts.)

Vette, don't worry about the tasteless humor on this forum ... you'll get used to it.:)

The picture of the Proton with the 'offset from hell' is mine. Wheel/tire protrusion is purely a matter of taste so do what you feel is right for you.

One thing to consider is that the VehiCross was hand made. We've found through this forum that there are variations from vehicle to vehicle. Some with 3" lift never have CV problems while others (like me) blow CV boots several times a year. Rim/tire combos may rub on some but not on others.

My advice to you is to take Merlin's advice on the rim size/offset. If you get interference, adjusting the lock stops is easy (from what I've read - never tried it myself 'cause I like the tight turning radius). Trimming the cladding/wheel well skirt is very easy as well.

The last thing not mentioned is that you can lift your front end slightly to avoid some rubbing as well. That's accomplished by just tightening 2 bolts on your torsion bars. You'll have to get an alignment after though.

One final comment: I ditched the Wrangler MTs over the weekend & put on Firestone ATs (I had a $100 off coupon). I did that for 3 reasons: The front tires were shot & needed to be replaced, Boy is driving it to school & I wanted a tire better behaved on the road for him, last & least is that they'll last much longer.

I don't like them (& neither does Boy). They handle very well on the road. They will last a long time. They are very quiet on the road. But ... they look so whimpy!!! Oh well, at least getting it through inspection should be easier now.

I'll post some pictures soon.

[crotchrocket]

The VX has the best turning circle of any vehicle i've owned, so loosing a few degrees wouldn't hurt if you need too.

Just for your information, my Isuzu is running an 8" wheel with a zero offset and 265 75 16 tyres. The tyre edge sits pretty much inline with the wheel arch (fender :D )

The other thing to add is that with my set up and i presume others that haven't increased their off set out beyond the arches is that i get full travel of the suspension using the OEM bump stops, my wheels dont rub at all.

I dont have any real front on pics so heres a close one

http://i76.photobucket.com/albums/j31/crotchrocket3000/vehicross/100_4965.jpg

[crotchrocket]

And articulation wise, you can see things tuck in nicely.

http://i76.photobucket.com/albums/j31/crotchrocket3000/chichester%20quarry/100_5311.jpg

http://i76.photobucket.com/albums/j31/crotchrocket3000/chichester%20quarry/100_5312.jpg

[VX KAT]

My advice to you is to take Merlin's advice on the rim size/offset.


Merlin....or Marlin?;)

[tom4bren]

Merlin....or Marlin?;)

Ooooppss!!

Fingers type faster than the brain sometimes.

Surprised there wasn't a :slap: stuck in there.:)

[VX KAT]

Ooooppss!!

Fingers type faster than the brain sometimes.

Surprised there wasn't a :slap: stuck in there.:)

Who me?.....I knew you'd take care of it yourself....:mbrasd::laugho: