[DeTomaso] Anyone have offset numbers for 8 inch front and 10inch rear wheels?
Tomas Gunnarsson
guson at home.se
Thu Aug 20 15:32:25 EDT 2015
Backspacing is measured on the outsides of the rim, the advertised rim width however is inside the bead where the tire sits. The difference is typically about 1". So an 8" rim is 9" on the outside and that's where you measure BS.
Tomas
----- Original Message -----
From: Ken Green
To: Mike Drew
Cc: detomaso at poca.com ; Tomas Gunnarsson
Sent: Thursday, August 20, 2015 8:54 PM
Subject: Re: [DeTomaso] Anyone have offset numbers for 8 inch front and 10inch rear wheels?
I first thought that, but the math doesn't work.
Offset = backspacing - width/2
So for the wheels on ebay (my only interest in these wheels is understanding the correct offset for a Panera):
front wheel offset = 5.25 - 8/2 = 1.25 inches = 31.75mm? Not 19mm.
Did I make a mistake here?
Maybe they measured the backspacing from the outside of the rim and the width as the tire mounting surfaces. If the difference is 1/2 inch thickness, the numbers could work out, but could result in a 1/2 inch fitment error if we are not careful.
Ken
------------------------------------------------------------------------------
From: Mike Drew via DeTomaso <detomaso at poca.com>
To: Ken Green <kenn_green at yahoo.com>
Cc: "detomaso at poca.com" <detomaso at poca.com>; Tomas Gunnarsson <guson at home.se>
Sent: Thursday, August 20, 2015 10:53 AM
Subject: Re: [DeTomaso] Anyone have offset numbers for 8 inch front and 10 inch rear wheels?
Ken,
ET 19 means 19mm offset....
Mike
Sent from my iPhone
On Aug 20, 2015, at 13:01, Ken Green via DeTomaso <detomaso at poca.com> wrote:
> Thanks Tomas,
> There are a set of Coddington "Pantera wheels" on ebay right now:
> [1]http://www.ebay.com/itm/Boyd-Coddington-Super-10-Spoke-Wheel-for-DeT
> omaso-Pantera-staggered-17x8-11-/181840688325
> with this description:
> "For sale is a set of four authentic Bill Coddington designed Super 10
> Spoke wheels. The front wheels measure 17x8 (et 19, or a 5.25"
> backspacing) and the rears measure 17x11 (et 12, or a 6.5" backspacing)
> and have a 5x114.3 (or 5x4.5) bolt pattern."
> If I have this right, the front wheels are 46mm inward versus your 19mm
> (about an inch difference). That seems substantial, and could cause
> clearance issues? What do you think? I'm not sure what the "et 19" in
> the description means.
> Ken,
> __________________________________________________________________
>
> From: Tomas Gunnarsson <guson at home.se>
> To: kenn_green at yahoo.com
> Cc: detomaso at poca.com
> Sent: Wednesday, August 19, 2015 11:50 PM
> Subject: Re: [DeTomaso] Anyone have offset numbers for 8 inch front and
> 10 inch rear wheels?
> Ken,
>
> 19 mm inwards on the front wheels, 5 mm outwards on the rears is what I
> have noted.
>
> Tomas
> <-----Ursprungligt Meddelande----->
> From: Ken Green via DeTomaso [detomaso at poca.com]
> Sent: 20/8/2015 6:21:15 AM
> To: detomaso at poca.com
> Subject: [DeTomaso] Anyone have offset numbers for 8 inch front and 10
> inch rear wheels?
> Been looking at aftermarket wheels, and need the offset (not the
> backspacing) to see if anything fits. I know backspacing numbers have
> been posted and I think offset is backspacing - width/2, but people
> seem to measure the backspacing differently.
> Thanks,
> Ken
>
> References
>
> 1. http://www.ebay.com/itm/Boyd-Coddington-Super-10-Spoke-Wheel-for-DeTomaso-Pantera-staggered-17x8-11-/181840688325
> _______________________________________________
>
> Detomaso Forum Managed by POCA
> Posted emails must not exceed 1.5 Megabytes
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-------------- next part --------------
i>>?
Backspacing is measured on the outsides of the rim, the advertised rim
width however is inside the bead where the tire sits. The difference is
typically about 1". So an 8" rim is 9" on the outside and that's where
you measure BS.
Tomas
----- Original Message -----
From: [1]Ken Green
To: [2]Mike Drew
Cc: [3]detomaso at poca.com ; [4]Tomas Gunnarsson
Sent: Thursday, August 20, 2015 8:54 PM
Subject: Re: [DeTomaso] Anyone have offset numbers for 8 inch front and
10inch rear wheels?
I first thought that, but the math doesn't work.
Offset = backspacing - width/2
So for the wheels on ebay (my only interest in these wheels is
understanding the correct offset for a Panera):
front wheel offset = 5.25 - 8/2 = 1.25 inches = 31.75mm? Not 19mm.
Did I make a mistake here?
Maybe they measured the backspacing from the outside of the rim and the
width as the tire mounting surfaces. If the difference is 1/2 inch
thickness, the numbers could work out, but could result in a 1/2 inch
fitment error if we are not careful.
Ken
__________________________________________________________________
From: Mike Drew via DeTomaso <detomaso at poca.com>
To: Ken Green <kenn_green at yahoo.com>
Cc: "detomaso at poca.com" <detomaso at poca.com>; Tomas Gunnarsson
<guson at home.se>
Sent: Thursday, August 20, 2015 10:53 AM
Subject: Re: [DeTomaso] Anyone have offset numbers for 8 inch front and
10 inch rear wheels?
Ken,
ET 19 means 19mm offset....
Mike
Sent from my iPhone
On Aug 20, 2015, at 13:01, Ken Green via DeTomaso
<[5]detomaso at poca.com> wrote:
> Thanks Tomas,
> There are a set of Coddington "Pantera wheels" on ebay right
now:
>
[1][6]http://www.ebay.com/itm/Boyd-Coddington-Super-10-Spoke-Wheel-for-
DeT
> omaso-Pantera-staggered-17x8-11-/181840688325
> with this description:
> "For sale is a set of four authentic Bill Coddington designed Super
10
> Spoke wheels. The front wheels measure 17x8 (et 19, or a 5.25"
> backspacing) and the rears measure 17x11 (et 12, or a 6.5"
backspacing)
> and have a 5x114.3 (or 5x4.5) bolt pattern."
> If I have this right, the front wheels are 46mm inward versus your
19mm
> (about an inch difference). That seems substantial, and could cause
> clearance issues? What do you think? I'm not sure what the "et 19"
in
> the description means.
> Ken,
> __________________________________________________________________
>
> From: Tomas Gunnarsson <[7]guson at home.se>
> To: [8]kenn_green at yahoo.com
> Cc: [9]detomaso at poca.com
> Sent: Wednesday, August 19, 2015 11:50 PM
> Subject: Re: [DeTomaso] Anyone have offset numbers for 8 inch front
and
> 10 inch rear wheels?
> Ken,
>
> 19 mm inwards on the front wheels, 5 mm outwards on the rears is
what I
> have noted.
>
> Tomas
> <-----Ursprungligt Meddelande----->
> From: Ken Green via DeTomaso [[10]detomaso at poca.com]
> Sent: 20/8/2015 6:21:15 AM
> To: [11]detomaso at poca.com
> Subject: [DeTomaso] Anyone have offset numbers for 8 inch front and
10
> inch rear wheels?
> Been looking at aftermarket wheels, and need the offset (not the
> backspacing) to see if anything fits. I know backspacing numbers
have
> been posted and I think offset is backspacing - width/2, but people
> seem to measure the backspacing differently.
> Thanks,
> Ken
>
> References
>
> 1.
[12]http://www.ebay.com/itm/Boyd-Coddington-Super-10-Spoke-Wheel-for-De
Tomaso-Pantera-staggered-17x8-11-/181840688325
> _______________________________________________
>
> Detomaso Forum Managed by POCA
> Posted emails must not exceed 1.5 Megabytes
> DeTomaso mailing list
> [13]DeTomaso at poca.com
> [14]http://poca.com/mailman/listinfo/detomaso_poca.com
>
> To manage your subscription (change email address, unsubscribe, etc.)
use the links above.
_______________________________________________
Detomaso Forum Managed by POCA
Posted emails must not exceed 1.5 Megabytes
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References
1. mailto:kenn_green at yahoo.com
2. mailto:MikeLDrew at aol.com
3. mailto:detomaso at poca.com
4. mailto:guson at home.se
5. mailto:detomaso at poca.com
6. http://www.ebay.com/itm/Boyd-Coddington-Super-10-Spoke-Wheel-for-DeT
7. mailto:guson at home.se
8. mailto:kenn_green at yahoo.com
9. mailto:detomaso at poca.com
10. mailto:detomaso at poca.com
11. mailto:detomaso at poca.com
12. http://www.ebay.com/itm/Boyd-Coddington-Super-10-Spoke-Wheel-for-DeTomaso-Pantera-staggered-17x8-11-/181840688325
13. mailto:DeTomaso at poca.com
14. http://poca.com/mailman/listinfo/detomaso_poca.com
15. mailto:DeTomaso at poca.com
16. http://poca.com/mailman/listinfo/detomaso_poca.com
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