[DeTomaso] Offset versus Backspace (was Re: What is thewidest wheel I can run . . .)

[Mirril M. McMullen]

Not so Asa!

 

I just had a custom set of wheels made, and I was confused also.

 

The width of the wheel is measured from the "inside" edge of the wheel lip
(where the rubber meets the wheel).

 

The backspace is measured from the "outside" edge of the wheel lip.

 

It is possible to have a 9" wheel (9" between the inner lips where the tire
touches), but have a 5" backspace with 0 offset, if the lips add another .5"
width to the wheel on both the inside and the outside.

 

I am going to right an article about the wheels I had made and the great
company that I worked with that makes custom widths and offsets for some
classic wheels.

 

Stay tuned!

 

74L WAYBAC

99 M3

98 323 Track Car

89 M3

74 Bronco

 

 

Mirril M. McMullen 

Mobile: 917 295.9587 

AIM:      MirrilM 

email:   MirrilM at earthlink.net 

 

 

-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
Behalf Of asajay at asajay.com
Sent: Monday, July 14, 2008 2:42 PM
To: asajay at asajay.com
Cc: detomaso at realbig.com
Subject: [DeTomaso] Offset versus Backspace (was Re: What is thewidest wheel
I can run . . .)

 

So let me clarify my question a bit.

 

How can a 9 inch wide rim, have an offset of 0.000 mm -and- a  

backspace of 5.00 Inches?

 

If it's 9 inches wide, and the offset is 0, that means the hub  

mounting surface is inline with the centerline of the wheel.  If that  

same surface is then used to measure the backspace, shouldn't it be  

4.5" since that is half of 9?

 

 

Can you see why I'm confused?

 

Asa Jay

<likes to think he's good at math, but often finds out he is not.>

 

 

Quoting asajay at asajay.com:

 

> On a stock bodied Pantera L?

> 

> It has 15x7 and 15x8 (front/rear) now.

> 

> How wide can I go in front versus how wide in the rear?

> I've also read all the articles on offset and backspacing, and I'm

> still confused.  What is the real difference and what do I want in an

> aftermarket wheel to fit properly?

> 

> I'm looking at inexpensive rims for just racing.

> Thanks,

> Asa Jay

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