MG Sports Cars

engine swaps and other performance upgrades, plus "factory" and Costello V8s

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Brownwood
Keith Montague

(176 posts)

Registered:
01/25/2014 08:08PM

Main British Car:


Max tire width with rear Bump stop
Posted by: Brownwood
Date: February 07, 2014 10:17AM

I have recently purchased my 1st MGB and plan on doing a 302 V8 swap. Is a nice driver car so the idea is to upgrade while I drive, on a budget and collect the V8 parts.

I ran across a smoking deal on a set of Mustang pony wheels with 225X50X16 tires. I am planning on modifying the rear bumpstop to remove where it sticks out in the wheelwell. It looks like 225s might just fit with some wheelwell lip rolling.

Is it possible or am i just dreaming? Also will they work on the front?


ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(1165 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

authors avatar
Re: Max tire width with rear Bump stop
Posted by: ex-tyke
Date: February 07, 2014 03:50PM

Quite a few of us run 225/50 rubber with some rear fender lip messaging, but axle width and wheel offset will play a big part in determining whether yours will work or not.
If wheel offset and axle width are close to optimum, you can get that size tire to work on the rear. The fronts (again depending on wheel offset and ride height) can work, with due regard to possible interference from sway bar linkage and header collectors.


Brownwood
Keith Montague

(176 posts)

Registered:
01/25/2014 08:08PM

Main British Car:


Re: Max tire width with rear Bump stop
Posted by: Brownwood
Date: February 07, 2014 04:11PM

Yes, it looks real close but doable. I am trying to confirm backspacing but based on info I can find it's 4-7/8 which should put offset very near 22MM.


ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(1165 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

authors avatar
Re: Max tire width with rear Bump stop
Posted by: ex-tyke
Date: February 07, 2014 04:50PM

22mm is close to the original MG wheel spacing - and it's the offset of my 15 x 7 Panaports. ...if your axle is original or same width as original, you should be in the ballpark.


mstemp
Mike Stemp
Calgary, Canada
(222 posts)

Registered:
11/25/2009 07:18AM

Main British Car:
1980 MGB Rover 4.6L

Re: Max tire width with rear Bump stop
Posted by: mstemp
Date: February 07, 2014 05:45PM

All depends on what size wheel, offset by itself is meaningless unless you know the width as well.
Case in point 205/55/16 on a 16X7" with ET 38 will not fit without spacers or removal of the inner bump stop.



Edited 1 time(s). Last edit at 02/07/2014 05:46PM by mstemp.


mgbreis
Ryan Reis
Beatrice, NE
(203 posts)

Registered:
07/16/2008 11:07AM

Main British Car:


Re: Max tire width with rear Bump stop
Posted by: mgbreis
Date: February 07, 2014 10:42PM

I'd love to see pony wheels on an mgb. I've always like that wheel.


ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(1165 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

authors avatar
Re: Max tire width with rear Bump stop
Posted by: ex-tyke
Date: February 08, 2014 08:51AM

Quote:
All depends on what size wheel, offset by itself is meaningless unless you know the width as well...
Keith has measured backspace at 4-7/8" and offset at 22mm - that indicates that the overall rim width is 8" or an actual bead to bead width of 7". So, Keith has a 16 x 7 Pony wheel with 22mm (+) offset and should fit his application based on my comments above.



mstemp
Mike Stemp
Calgary, Canada
(222 posts)

Registered:
11/25/2009 07:18AM

Main British Car:
1980 MGB Rover 4.6L

Re: Max tire width with rear Bump stop
Posted by: mstemp
Date: February 08, 2014 02:01PM

Graham,

Sorry missed part of Keith's comments. 225/50/16 is still going to be tight and require fender lip mods. Even my setup rubs the outside occasionally but I have not rolled the fender lip. My offset is 31 mm when you factor in the spacers.


billymgb1000
bill gaulin
harrisville R.I.
(74 posts)

Registered:
11/30/2012 12:31AM

Main British Car:
1974 MGB V8 LS1 5.3

Re: Max tire width with rear Bump stop
Posted by: billymgb1000
Date: February 09, 2014 06:44PM

Does that bolt pattern bolt up, I always thought that pattern didn't


rcf4
Robert Fish

(8 posts)

Registered:
10/27/2007 08:26PM

Main British Car:


Re: Max tire width with rear Bump stop
Posted by: rcf4
Date: February 10, 2014 09:12AM

The Mustang bolt pattern is 4 x 4.25" or 4 x 108 mm for the Fox bodies. The MGB is 4 x 4.5" is I remember correctly. Anyway, I had an 89 Mustang with the chrome Pony R wheels and they wouldn't fit. Looked really nice on the Mustang. My wife wanted me to keep the wheels when I sold the car. lol.


Brownwood
Keith Montague

(176 posts)

Registered:
01/25/2014 08:08PM

Main British Car:


Re: Max tire width with rear Bump stop
Posted by: Brownwood
Date: February 10, 2014 02:57PM

Dang you guys are right. Ponies are 4X4.25. Almost made a big mistake!


mgb260
Jim Nichols
Sequim,WA
(2461 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: Max tire width with rear Bump stop
Posted by: mgb260
Date: February 10, 2014 04:39PM

Keith, You can use 1" dual bolt pattern adapters.


ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(1165 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

authors avatar
Re: Max tire width with rear Bump stop
Posted by: ex-tyke
Date: February 10, 2014 05:16PM

Quote:
Keith, You can use 1" dual bolt pattern adapters
Those will really screw up Keith's tire clearance issue though.....


mgb260
Jim Nichols
Sequim,WA
(2461 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: Max tire width with rear Bump stop
Posted by: mgb260
Date: February 10, 2014 05:30PM

Graham, True, but he's looking for flares now. Bruce's car is using 2" 2 piece 4 lug to 5 lug adapters and Omni flares for his R type wheels.

[www.britishv8.org]



Edited 3 time(s). Last edit at 02/10/2014 05:42PM by mgb260.


ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(1165 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

authors avatar
Re: Max tire width with rear Bump stop
Posted by: ex-tyke
Date: February 10, 2014 06:56PM

Is there any opportunity to redrill for 4 on 4-1/2" bolt pattern?...front and rear flange surface seems to be pretty flat.
Pony  1.jpg

Pony 2.jpg



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