Wheel Back Spacing
------------------------------
Date: 05 Jun 1997 11:38:15 -0700
From: Robert Elsemore
Subject: Back spacing
To: loki@crestedbutte.net (Return requested),
>I was wondering if anyone had a formula worked out for what size tires
>go with a minimum back spacing. mostly concerned about 33x12.5's on a
>pre ifs truck. what was the stock backspacing? are spacers OK to
>use? Rob Boyle 85 4runner
Rob,
I guess the curb is the limit when going for negative offset, but when
going for max positive offset on a solid axle truck, 3.75 inches of
backspacing is the limit. I have 15x8 M/T-Alcoas with 3.75 inches of
backspacing on my 85 4Runner. If the inner wheel weights are not
fastened properly on the lip of the rim, they will hit the tie rod
end. It's that close!
My tires are 33x12.5x15 Bridgestone Deuler AT's and I have minimal
rubbing problems. The front tires do not rub on the leaf springs,
but they do rub in the rear of the front fender well (pretty common
on 84-88 style bodies). The rear tires lightly rub on the very inner
part of the rear fender well (where the rubber splash guard is) when
I am at full articulation...never enough to rip off the splash guard
yet :) I have never encountered rubbing on the top/outer part of
my fenders. The tires tuck in quite well and mud/dirt slinging onto
the side of the truck is kept to a minimum too.
DON'T use spacers! We're trying save them for all of the lowered,
chromed, neon boulevard cruisers ;)
- -Rob Elsemore, 85 4Runner
------------------------------
------------------------------
Date: Sat, 21 Jun 1997 11:07:53 -0400
From: Christopher B Knight
Subject: Rims for an 85
To: "Toy4x4@tlca.org"
Would the SR-5 aluminum rims from a newer toyota fit on my 85 solid axle
vehicle. I really like the look of the rims that form an X. I believe
they stoped making them and have gone to something different but I'm not
sure about that. I need to know if the backspacing on these rims would
cause problems under my truck?
Thanks for all the help!
230,000 and still going......might have something to do with the brakes
not working.
- ---------------------------------------------------------
Date: Sun, 22 Jun 1997 12:03:58 PDT
From: "marc shirah"
Subject: rims for an '85
To: Toy4x4@tlca.org
I put a set os 92 SR5 rims with 31's on my Tacoma,then gave them back to
my cousin when I bought my Ultra rims.I think that a rim from any toyota
pickup will bolt up to another year, including the t-100 and Tacoma.
Marc shirah
95 taco reg. cab
2.7/auto tranny
Ultra 15x8 3/4's with 31's mud tires
cb,Pioneer cdplayer,about to install two Kicker competition 10 inch
speakers with a set of 6&1/2 kicker impulses to replace my 2 factory
speakers
------------------------------
Date: Sun, 22 Jun 1997 10:01:14
From: Barney McNamara
Subject: Rims for an 85
To: Toy4x4@tlca.org
>From: Christopher B Knight
>Would the SR-5 aluminum rims from a newer toyota fit on my 85 solid axle
>vehicle.
I assume you are talking about SR-5 rims from an IFS truck. If so, the
answer is no. The backspacing on the IFS compatible rims is more, by
about 1/2 inch, than the solid axle rims. This causes the rims to hit
the ends of the tie rod in the front. They sell spacers to put between
the hubs and the inside of the rims, but I decided not to do it, even
after getting a great deal on a nice set of used rims and tires. I took
the used ones back, and bought new rims that were made to fit properly.
I was concerned that the spacers might weaken the front wheel mounting,
and keeping the front wheels on the truck is very important to me.
BTW - I measured the distance from the hub mounting surface to the inside
of the rim where it mounts to the tire bead on my wheels, and found it to
be 3.6 inches.
\ /\ / Inside of rim
| | |
| | |
|_____\/______| Hub mounting surface
| |
| |
| |
/ \ Outside of rim
View of the rim from the side, without tire mounted
______________________________________________________________
Barney McNamara JENNY - 83 Toyota Short Bed
( barney@flowpoint.com ) stock 22R motor ; 3" body lift
Santa Cruz, Ca. 8" alloy rims; 31" BFG A/Ts
homepage: http://www.scruz.net/~barneym/barnhome.htm
______________________________________________________________
------------------------------
------------------------------
Date: 22 Jun 1997 16:48:00 -0700
From: Dion Hollenbeck
Subject: rims for an '85
To: toy4x4@tlca.org
>> marc shirah writes:
> I put a set os 92 SR5 rims with 31's on my Tacoma,then gave them back to
> my cousin when I bought my Ultra rims.I think that a rim from any toyota
> pickup will bolt up to another year, including the t-100 and Tacoma.
Not so! Especially for an `85. When I got my 4Runner, it had 12"
rims on it. I bought a set of stock later model chrome rims and tires
and as soon as I bolted them on, the back inside of the rim bound on
something behind the wheel and I could not budge the car. Fortunately
I could take them back.
Yes, the bolt pattern is the same, but you must be very careful about
clearance on the backside as not all rims will clear all front wheel
brake and suspension parts.
dion
`85 4Runner 22RE
`86 4x4 PU 22RE
Dion Hollenbeck (619)597-7080x164 Email: hollen@vigra.com
http://www.vigra.com/~hollen
Sr. Software Engineer - Vigra Div. of Visicom Labs San Diego, California
------------------------------
Date: Sun, 22 Jun 1997 21:55:56 -0700
From: nickkrest@batnet.com (Nick Krest)
Subject: Rims for an 85
To: Toy4x4@tlca.org
Christopher B Knight wrote:
"Would the SR-5 aluminum rims from a newer toyota
fit on my 85 solid axle vehicle...I need to know
if the backspacing on these rims would cause
problems under my truck?"
Barney is, of course, correct. The backspacing (offset) is different for
IFS trucks than it is for solid-axles. That is why Toyota had to make the
'86 and later rear axles about 3" wider than '85 and earlier. Putting an
IFS wheel on a solid-axle truck will cause clearance problems front and
rear.
There are dozens of rims from all sorts of manufacturers that will fit your
truck perfectly, and bolt pattern is only one part of the equation. Any
reputable manufacturer and/or retailer will be able to provide you with
fitment info. Good luck in finding one that appeals to you.
- Nick
------------------------------
------------------------------
Date: Mon, 23 Jun 1997 14:23:48 -0400 (EDT)
From: Toy4x4s@aol.com
Subject: Alum wheels on an 85...
To: Toy4x4@tlca.org
Christopher,
Ok, here is what happened to us... The 85 truck had big 32x11.50x15 trail
tires... we were gonna go take the new 88 4Runner up and play at Rubicon...
So I decided to swap the 2 sets of tires. Yes, my 88 had the alloys that
came on SR-5's. After A LOT of work, the 88 looked GREAT with the big
tires... but when i went to move the truck to go put it back in the
garage, it WOULDN"T move.... The alloys touch the disk brake caliper
and DO NOT allow it to move... Since I will not put a spacer of any
kind on, we couldn't do this...
As for "they stopped making them..." you can get used sets, also new
"look alike's" that are much cheaper than the Toy original ones. When
I lived in the Denver Metro area i went to a place called Coys Tire
and wheel. They have all sorts of used stuff, like "stock take-off's"
from new cars... Frequently insurance companies get a used wheel here
as opposed to buying it new from dealer. Like the wheels you like are
around $400 new APIECE from Toyota... I traded my Toyota Alloys in here
and got the credit from them applied to my new set of 15x8 Ultra Alloys.
This is when i also saw the after market look alikes that were exactly
the same, brand new, and actually affordable!
June Bennett
TLCA 2942
------------------------------
Date: Wed, 16 Jul 1997 10:01:12 -0400
From: Ed.Wong@astramerck.com
Subject: Backspacing on IFS
To: " - (052)Toy4x4(a)tlca.org"
I know Scott started this thread - but no on has mentioned the numbers yet.
My 89 (gen1) 4Runner had the "dawg bowl" steel stockers - and they had 4.75"
of backspacing. I now run AR wagon wheels or another "star/fake rivit" wheel
(depending on summer tyres or studded sno tyres) and both run a 4.5"
backspacing.
Some Nissan wheels may fit, but one set I got had a 5.25" backspacing!
I run a smaller tyre - so I dont have any rubbing problems
EWong
------------------------------
------------------------------
Date: Wed, 16 Jul 1997 07:58:54 -0700
From: nickkrest@batnet.com (Nick Krest)
Subject: Wheel Solutions?
To: Toy4x4@tlca.org
Scott Wilson wrote:
"Nick was nice enough to let me try AR's with
33's on for a 2nd time to check clearances.
Supposedly the AR-23's I want, have the same
off-set as Nick's AR-26's They weren't even
close to working on my IFS truck. They rubbed
on level ground with the wheel turned all the
way either direction....I REALLY want alloys.
Has anyone found a solution?"
Nice enough, my &#@! You owe me money, Wilson!
Just kidding. Actually, those particular wheels are Enkei 26's from 10 or
more years ago. I have a set of CenterLines with my desert tires on them,
too, but those are a different offset. I would recommend going with
CenterLines or Ultras (going on my prerunner). They do and will make them
in most every offset under the sun.
Also remember that, everything else being equal, a forged wheel is going to
be lighter and stronger than a cast one (e.g. American Racing and most
others). There is a price difference, but believe me, you will pay ANY
price to not have a broken wheel off-road. Cast wheels tend to break;
forged wheels tend to bend. A (big) rubber mallet or hammer will usually
straighten a forged (or steel) wheel to the point where it will hold a
bead, whereas a cast wheel mostly leaves you trying to ponder "Plan B."
Since we're kind of on this subject, I'm looking to get some mud tires for
our notoriously muddy California winters (kidding...). What we have is not
slick goo or gumbo like in the East, but adobe clay. It sticks and don't
let go. I need an open tread pattern to throw it off; all-terrain tires
turn into slicks when they come into contact with adobe mud.
I was pondering the Swamper TSL Radials. Anybody have any experience with
them? I will not be using them for lots of highway driving or anything like
that. They'll go on in December and off in March, and definitely be off for
any desert/Baja/road trips.
- Nick
------------------------------
Date: Wed, 16 Jul 1997 08:29:39 -0700
From: Eric Stegall
Subject: Wheel Solutions?
To: Toy4x4@tlca.org
Scott,
On my '91 X-cab (4" lift) I have 15x10 Alcoas($$$) with 33x12.5s and I
don't have any problems with clearance; except when the wheels are turned
and the front end is compressed, then the tires rub on the valance. Some
tin snips will take care of this problem. I believe Alcoas only have a
"standard offset" for their 10" rims. Give 4WPH in San Jose a call to find
out what it is. You are more than welcome to try mine out if you would like.
- --Eric
P.S. How is the Pismo trip coming together?
------------------------------
------------------------------
Date: Thu, 17 Jul 1997 09:03:35 -0500
From: Brian Gallus
Subject: Wheel Offset
To: "'Toy4x4@tlca.org'"
When I was looking for wheels, I talked with the guys at Downey for a
couple of minutes about the subject. Apparently AR makes an Outlaw 2
with the 4.75 *toyota* standard offset. It's a rare bird, but Downey
has the part number and you should be able to order it from anyone
who deals in ARs.
Someone mentioned Forged/Cast. Frankly, of the wheels I've seen and
the ones I ordered (learned the hard way), there is no standard in
advertising for wheels. I have Weld Roadhawks (15*8) and only the
center section if forged. I blew a gasket when I found that out and
spend many an hour yelling at the sales rep and Mr. Weld himself
(they wouldn't let me return the wheels - LONG story). So the center
section is forged and the barrel is spun aluminum - same as any cheap
cast wheel. The only true forged wheels that you will find should be
one piece wheels (MT, Boyds) - be careful with two piece.
My opnion? Save money, go cast and carry a full size spare.
bkg
PS. Looking for an 85 shortbed, SR5 4by in *decent* condition.
Cheap.
------------------------------
------------------------------
Date: Wed, 19 Nov 1997 16:40:15 -0800 (PST)
From: Chris Geiger
Subject: Rim size?
To: Toy4x4@tlca.org
If you are planning to stay with the 31" tires, I say stay with 7" wheels
if you plan to use 33" tires in the future you may want to buy 8" wheels.
Stay away from rims with a 3.5" backspacing, If you don't use 4.5"
wheels the tires will stick out on the wheel wells and you truck will
look funny. But I guess some people like funny, Mickey Mouse is still in
business
Chris Geiger 93 4Runner http://geiger.mcl.ucsb.edu/offroad.html
> I am getting ready to buy rims for my 93 xcab. I have 31x10.5 tires and no
> lift. I don't know if I should buy 15x7 or 15x8 rims. I could use some
> recommendations and pros and cons of each. Thanks
------------------------------
------------------------------
Date: Tue, 15 Sep 1998 17:36:43 -0700
From: "Roger Brown, P.E."
Subject: Re: Wheel Question.....
alan300@ticnet.com writes:
> Quick wheel question here.....Does anyone know how far 15x8 wheels extend out
> from the fender of the truck?
> Just wandering if I want to go with 15x8s or 15x10s......
Depends on the backspacing and tire. Here's some data from my recent
wheel/tire upgrade on a solid axle 4Runner:
Old New
------ -----
Wheel 15x6 15x10
Backspacing 3.25" 2.5"
Tire 33x9.50 33x15.50
Mounted width 8" 14"
Fender->Tire -2" (i.e. innie) +4" (i.e. outie)
Just do the math from your old wheel-tire combo to the new one:
Add any lesser backspace to the current track
Add 1/2 the new wheel width to the current track
Add 1/2 the extra tire width to the current track
There you have a good estimate for your new track, for example on mine:
(3.25-2.5) + (10-6)/2 (14-8)/2 = 5.75" which is about what I observe.
- --
Roger Brown
------------------------------
Back to the top of this thread
Back to the top of the Hub-Axle-Tire Threads Group
Back to the top of the Technical Discussion Groups
Back to the top of the Toy Thread Tree