Ford rims have 15x7x12 stamped on them. What exactly is the 12?


outatime88

New member
Joined
Oct 25, 2014
Messages
17
Reaction score
0
Points
1
Location
California
Vehicle Year
1997
Make / Model
Ford
Engine Type
2.3 (4 Cylinder)
Transmission
Manual
So I went to the junkyard today and found some of the teardrop ranger/explorer rims and decided to buy five of them even though I wanted to continue using my 14s.

Two of them say F67A 1007-NA and 15x7x12
Three of them say F87A-1007-SA and 15x7x12.0

So what does the 12 in 15x7x12 indicate?

Between these wheels I notice that the structure of the rim is different, the F67A wheels have sort of a step up half way through the rim and the F87A have a tapered style. I need to get a scale but I think I noticed they have a slight difference in weight.

Also what are the chances that these all have the same offset and will they all fit 2wd?
 
Last edited:


Rock Auto 5% Discount Code: 248EE46702D889 Expires: October 1, 2019

85_Ranger4x4

Forum Staff Member
Forum Moderator
Article Contributor
OTOTM Winner
TRS Banner 2010-2011
TRS 20th Anniversary
Joined
Aug 7, 2007
Messages
19,843
Reaction score
779
Points
113
Location
SW Iowa
Vehicle Year
1985
Make / Model
Ford
Engine Size
5.0
Transmission
Manual
I think rangers always had the same offset.
 

97RangerXLT

Forum Staff Member
Forum Moderator
Article Contributor
TRS 20th Anniversary
Joined
Sep 18, 2007
Messages
3,725
Reaction score
204
Points
63
Location
Fishers, IN
Vehicle Year
1997
Make / Model
Ford
Engine Type
4.0 V6
Engine Size
4.0
Transmission
Automatic
2WD / 4WD
4WD
Total Lift
2"
Tire Size
31"
Just a wild guess here... but could the 12 be the maximum diameter of the brake rotor/ drums that the rim will clear?

AJ
 

pjtoledo

Well-known member
Supporting Member
U.S. Military - Veteran
Joined
Oct 5, 2007
Messages
1,866
Reaction score
102
Points
63
Location
Toledo Ohio
Vehicle Year
20002005199
Make / Model
Fords
Engine Size
3.0 2.3
My credo
get outta my way, I'm falling!
12 is the offset in millimeters. for reference 12.7 mm = 1/2"
those wheels all have a 1/2" offset.
 

85_Ranger4x4

Forum Staff Member
Forum Moderator
Article Contributor
OTOTM Winner
TRS Banner 2010-2011
TRS 20th Anniversary
Joined
Aug 7, 2007
Messages
19,843
Reaction score
779
Points
113
Location
SW Iowa
Vehicle Year
1985
Make / Model
Ford
Engine Size
5.0
Transmission
Manual
12 is the offset in millimeters. for reference 12.7 mm = 1/2"
those wheels all have a 1/2" offset.
Rangers also have 1/2" diameter wheel studs.
 

outatime88

New member
Joined
Oct 25, 2014
Messages
17
Reaction score
0
Points
1
Location
California
Vehicle Year
1997
Make / Model
Ford
Engine Type
2.3 (4 Cylinder)
Transmission
Manual
12 is the offset in millimeters. for reference 12.7 mm = 1/2"
those wheels all have a 1/2" offset.
But why would Ford use two different dimensional units and not even show a physical representation to know which is IPS and which is metric? Seems like poor engineering practice to me :unsure:
 

pjtoledo

Well-known member
Supporting Member
U.S. Military - Veteran
Joined
Oct 5, 2007
Messages
1,866
Reaction score
102
Points
63
Location
Toledo Ohio
Vehicle Year
20002005199
Make / Model
Fords
Engine Size
3.0 2.3
My credo
get outta my way, I'm falling!
don't blame Ford, it's an industry standard (in the U.S.) to define wheel diameter & width in inches, offset in millimeters. backspace is usually inches, bolt circle diameter can be either.
it's one of those "Oh, we thought you knew what we meant" situations
 

sgtsandman

Active member
U.S. Military - Active
Joined
Mar 11, 2017
Messages
805
Reaction score
239
Points
43
Location
Aliquippa, PA
Vehicle Year
2011 & 2019
Make / Model
Ford XLT & FX4
Engine Size
4.0 SOHC & 2.3 Ecoboost
2WD / 4WD
4WD
Tire Size
31X10.5R15 & 265/65R17
Yep, that is industry wide. Not just Ford. It can make it confusing when looking to get new or replacement rims. Especially since some rims are listed with offset and others with backspacing.
 

outatime88

New member
Joined
Oct 25, 2014
Messages
17
Reaction score
0
Points
1
Location
California
Vehicle Year
1997
Make / Model
Ford
Engine Type
2.3 (4 Cylinder)
Transmission
Manual
don't blame Ford, it's an industry standard (in the U.S.) to define wheel diameter & width in inches, offset in millimeters. backspace is usually inches, bolt circle diameter can be either.
it's one of those "Oh, we thought you knew what we meant" situations
Yep, that is industry wide. Not just Ford. It can make it confusing when looking to get new or replacement rims. Especially since some rims are listed with offset and others with backspacing.
Interesting, well I guess its good that I don't have to measure the offset since its already stated.

So here's another question for you guys, as you can see in the photo these two wheels have a different structure, the one on the left has a step and seems to weigh slightly more than the tapered rim on the right. Is there anything wrong with using both rims together?

If the rims do in fact weigh differently (I'm going to get a scale), I should only run the ones that are heavier on the rear(left and right), and the lighter on the front(left and right)? I would think running different weighted rims on one axle would be dangerous.

29679
 

sgtsandman

Active member
U.S. Military - Active
Joined
Mar 11, 2017
Messages
805
Reaction score
239
Points
43
Location
Aliquippa, PA
Vehicle Year
2011 & 2019
Make / Model
Ford XLT & FX4
Engine Size
4.0 SOHC & 2.3 Ecoboost
2WD / 4WD
4WD
Tire Size
31X10.5R15 & 265/65R17
You’ve gone farther into the rabbit hole than I have. Spare tires on vehicles often have different rims and tires than the rest of the vehicle but are not meant for long term use.

I can’t see where your thinking is faulty. But someone else might be able to give you a more knowledgeable answer.
 

85_Ranger4x4

Forum Staff Member
Forum Moderator
Article Contributor
OTOTM Winner
TRS Banner 2010-2011
TRS 20th Anniversary
Joined
Aug 7, 2007
Messages
19,843
Reaction score
779
Points
113
Location
SW Iowa
Vehicle Year
1985
Make / Model
Ford
Engine Size
5.0
Transmission
Manual
Running a full-size spare on a steel rim with three alloys I never noticed a difference.
 

4x4junkie

Forum Staff Member
Forum Moderator
TRS 20th Anniversary
Joined
Aug 19, 2001
Messages
10,190
Reaction score
132
Points
63
Location
So. Calif (SFV)
Vehicle Year
1990
Make / Model
Bronco II
Engine Type
2.9 V6
Engine Size
2.9L V6
Transmission
Manual
2WD / 4WD
4WD
Tire Size
35x12.50R15
I don't think this is something that will matter.

But if you're worried about it, then run two of the same on the front, and the other same two on the rear (which ones go where does not matter, and won't play into a normal 4-tire rotation at all).

FWIW, the unsprung weights on the front axles of these trucks ('83-'97) are already not the same on both sides to begin with (especially on 4WD models) due to the design of the front axle beams.
 

pjtoledo

Well-known member
Supporting Member
U.S. Military - Veteran
Joined
Oct 5, 2007
Messages
1,866
Reaction score
102
Points
63
Location
Toledo Ohio
Vehicle Year
20002005199
Make / Model
Fords
Engine Size
3.0 2.3
My credo
get outta my way, I'm falling!
Interesting, well I guess its good that I don't have to measure the offset since its already stated.

So here's another question for you guys, as you can see in the photo these two wheels have a different structure, the one on the left has a step and seems to weigh slightly more than the tapered rim on the right. Is there anything wrong with using both rims together?

If the rims do in fact weigh differently (I'm going to get a scale), I should only run the ones that are heavier on the rear(left and right), and the lighter on the front(left and right)? I would think running different weighted rims on one axle would be dangerous.

View attachment 29679


the wheel on the left, stepped one, has clearance for a larger 12" front brake rotor.
the tapered one is for 11.25" front rotors.
since you have a 1997 the rotor upgrade is not do-able, so the wheel differences are a non-issue.
 

outatime88

New member
Joined
Oct 25, 2014
Messages
17
Reaction score
0
Points
1
Location
California
Vehicle Year
1997
Make / Model
Ford
Engine Type
2.3 (4 Cylinder)
Transmission
Manual
the wheel on the left, stepped one, has clearance for a larger 12" front brake rotor.
the tapered one is for 11.25" front rotors.
since you have a 1997 the rotor upgrade is not do-able, so the wheel differences are a non-issue.
Ah I see, I had a feeling it had more of a specific reason.

Thank you for the help guys, I'm going to make a trip to another local junkyard and see if I can find any more matching rims and if I can't find anything to satisfy my OCD habit of having everything be the same then I'll just do the two of one type in the front on the other in the back.
 


Top