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Registered
Join Date: Nov 2002
Posts: 1,955
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Wheels: "ET" v. "Backspace"
I'm selling some wheels.
The ET numbers are ET13 (8.5 inch wide wheel) and ET14 (10 inch wide wheel). Some people have asked me what the "backspacing" is. Is it possible to calculate the backspacing from the above? |
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02-25-2005, 07:51 PM
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Registered
Join Date: Jul 2004
Location: Summit Point area
Posts: 250
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You have any pics?
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David Walsh 77 911 04 ram 2 E30's 87' and my John Deere Http://www.ProBraking.com |
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02-25-2005, 09:07 PM
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Re: Wheels: "ET" v. "Backspace"
Quote:
It is probably easier to just measure it. Lay the wheel upside down and put a straightedge on the backside, spanning the rim edges. If the tire is still mounted, avoid laying the staightedge on the rubber--make sure it is on the rim edge only. Now measure perpendicular to the straightedge down to the hub mating surface. That measurement is the backspacing for the wheel. TT
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Tom Tweed Early S Registry #257 R Gruppe #232 Rennlist Founding Member #990416-1164 Driving Porsches since 1964 Last edited by ttweed; 02-26-2005 at 05:44 AM.. |
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02-26-2005, 05:02 AM
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Moderator
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This diagram shows the relationship
 As Thom said some measurement will be needed.
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Bill Verburg '76 Carrera 3.6RS(nee C3/hotrod), '95 993RS/CS(clone) | Pelican Home |Rennlist Wheels |Rennlist Brakes | |
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02-26-2005, 05:29 AM
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Posts: 1,955
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Got it, thanks!
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02-26-2005, 08:13 AM
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another round please
Join Date: Sep 2004
Location: Carmel In.
Posts: 4,452
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Bill, do you have any idea of the offset for a set of 18" Turbo Twist's from 96. Ive seen somewhere where the front is 48mm and back is 57mm. Does that sound about right. Thanks
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Getting old is not for wimps. |
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02-26-2005, 06:22 PM
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911
Ultima GTR
LeGrand DSR
GT3
1976 Porsche Carrera 3.0
1995 Porsche 993 Carrera Coupe
