Please login or register.

Login with username, password and session length
Pages: [1] |   Go Down

Author Topic: The great 114.3mm v 115mm debate  (Read 3031 times)

0 Members and 1 Guest are viewing this topic.

Woodvark

  • Urban Legend
  • Dippy God
  • ****
  • Offline
  • West of Indy
  • Posts: 1694
  • Disturbing the peace since 1956
The great 114.3mm v 115mm debate
« on: November 29, 2015, 20:59:25 »

Our cars have a hub/wheel bolt circle listed as 4.5 inches or 114.3mm.  LX cars and some other brand x are listed at 115mm.  The difference between the two is 0.0275 inches.  My personal observations after using a little trigonometry and a Vernier caliper on several Mopar and GM hubs is that there are manufacturing tolerances greater than 0.0275 inches including at least one 115mm hub that measured 114.26mm (4.498 inches) or a manufacturing discrepancy of 0.029 inches.

The topic has been debated many times in many forums with no apparent consensus or conclusion.  IMHO, the two advertised sizes are essentially the same, plus or minus manufacturing tolerances, and the two sizes are interchangeable (not considering other factors such as hub diameter).  Others say "no" citing the stated/advertised difference and excess lateral stress on studs with the possibility of breaking studs or wheels.

Let the debate begin.

 
Logged
"She may not look like much, but she's got it where it counts, and I've made a lot of special modifications myself."  - Han Solo

Dippy.org

  • Advertisement
  • ***

Ice Cold

  • Dippy Oracle
  • *****
  • Offline
  • Frozen Wastelands, Canada
  • Posts: 17563
  • Mopar or No Car
Re: The great 114.3mm v 115mm debate
« Reply #1 on: November 30, 2015, 09:58:23 »

OK, I'll get my 2 cents in.
Even if you post the 114.3 vs 115 question on a search, the answers still vary.

I wouldn't run them, or buy a M/F that had them on.
Still takes a little stud stretching and a good impact.
Don't think you could do it by hand, even with a pipe.

I don't see the E/B/A guys running them at car shows around here.
Generally, yes they are close, but not close enough for me.
More like Redneck engineering close.
Logged
1988 Fifth Ave
1987 Diplomat
1989 Diplomat AHB
1979 Lebaron Medallion 4dr
1979 Lebaron Coupe
1977 Aspen R/T
All drivers.
Too many cars and still looking.

Patrick

  • I'm Back!!!!
  • Inactive
  • Dippy God
  • *
  • Offline
  • Posts: 1043
Re: The great 114.3mm v 115mm debate
« Reply #2 on: November 30, 2015, 10:00:21 »

Are the M's hub centric or lug centric?

I know on my truck, the rims (wheels) are lug centric and not hub centric, meaning they never contact the hubs, but are centered via the lug nuts. It is possible to open the center hole wider and use a full size truck rim as they are otherwise interchangeable.

My opinion is that much depends on the way the car was intended to have the wheels centered. The lugs hold it to the car in either case.
Logged

270SE

  • The Other F-body (the one that's fast)
  • Dippy Oracle
  • *****
  • Offline
  • NC
  • Posts: 6279
  • Vinyl, woodgrain, and shag- that's an interior
Re: The great 114.3mm v 115mm debate
« Reply #3 on: November 30, 2015, 10:27:43 »

Are the M's hub centric or lug centric?

I know on my truck, the rims (wheels) are lug centric and not hub centric, meaning they never contact the hubs, but are centered via the lug nuts. It is possible to open the center hole wider and use a full size truck rim as they are otherwise interchangeable.

My opinion is that much depends on the way the car was intended to have the wheels centered. The lugs hold it to the car in either case.
Pretty sure all the 5x4.5 Chrysler products are hub-centric.
Logged

DobaMark

  • Dippy Oracle
  • *****
  • Offline
  • Pittsburgh
  • Posts: 6424
Re: The great 114.3mm v 115mm debate
« Reply #4 on: November 30, 2015, 10:47:25 »

Chryslers have pretty much always been hub-centric.

I know you can probably run the 115mm wheels on a 114.3mm car and never have an issue, but I'm not going to do it on mine.
« Last Edit: December 01, 2015, 07:27:53 by DobaMark »
Logged

Ice Cold

  • Dippy Oracle
  • *****
  • Offline
  • Frozen Wastelands, Canada
  • Posts: 17563
  • Mopar or No Car
Re: The great 114.3mm v 115mm debate
« Reply #5 on: November 30, 2015, 19:51:03 »

If I wanted larger wheels, I'd go 'cough' Furd first.
Logged
1988 Fifth Ave
1987 Diplomat
1989 Diplomat AHB
1979 Lebaron Medallion 4dr
1979 Lebaron Coupe
1977 Aspen R/T
All drivers.
Too many cars and still looking.

DobaMark

  • Dippy Oracle
  • *****
  • Offline
  • Pittsburgh
  • Posts: 6424
Re: The great 114.3mm v 115mm debate
« Reply #6 on: December 01, 2015, 07:28:40 »

If I wanted larger wheels, I'd go 'cough' Furd first.
I guess that's only fair.  My Dad ran my extra 15" Cordoba wheels on his Ford Ranger to replace the factory 14" ones.
Logged

80 Lebaron Coupe

  • 5 M Coupes
  • Honored Member
  • Dippy Oracle
  • *****
  • Offline
  • Diplomaniac Drive, East Texas.
  • Posts: 8481
  • Lebaron Coupe. Muscle with a touch of Class.
Re: The great 114.3mm v 115mm debate
« Reply #7 on: December 01, 2015, 08:36:04 »

I am weird about putting anything but Mopar on My Mopars.
I wont even paint a Mopar engine a Ford or GM color. :biggrin:



Logged
5 1980 & 81 M Coupes
88 Dodge Diplomat AHB
80 Plymouth Volare Duster
80 & 2-83 Dodge Miradas

Ice Cold

  • Dippy Oracle
  • *****
  • Offline
  • Frozen Wastelands, Canada
  • Posts: 17563
  • Mopar or No Car
Re: The great 114.3mm v 115mm debate
« Reply #8 on: December 01, 2015, 08:53:58 »

I guess that's only fair.  My Dad ran my extra 15" Cordoba wheels on his Ford Ranger to replace the factory 14" ones.
There was a guy with real nice Mirada wheels on his Furd at a show.
Tried to talk him out of them.
Logged
1988 Fifth Ave
1987 Diplomat
1989 Diplomat AHB
1979 Lebaron Medallion 4dr
1979 Lebaron Coupe
1977 Aspen R/T
All drivers.
Too many cars and still looking.

Mike

  • Global Moderator
  • Dippy Oracle
  • *
  • Offline
  • Canada
  • Posts: 9231
Re: The great 114.3mm v 115mm debate
« Reply #9 on: December 01, 2015, 18:25:03 »

There's a guy around here who had Mirada rims on a number of cars and even a trailer for a while. They are still on something, I forget what now tho.
Logged

MarkM

  • Dippy Oracle
  • *****
  • Offline
  • Michigan
  • Posts: 4204
Re: The great 114.3mm v 115mm debate
« Reply #10 on: March 10, 2017, 09:31:18 »

Back up from the murky depths...

I wouldn't worry about the size difference in the two.  Only thing that would prevent me from putting 115mm wheel on an old Chrysler would be if there was anything weird with the wheel centering on the hub.  That being said though aftermarket wheel availability for our cars isn't scarce.  Don't see why you would unless you were just looking for cheap wheels.
Logged
87' Fifth Avenue - 512/518/8.75 - built for twisties

Pages: [1] |   Go Up