 ET vs Backspacing, What the... |
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| Krieger |
 Oct 8 2024, 06:14 PM
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Advanced Member  Group: Members Posts: 4,847 Joined: 24-May 04 From: Santa Rosa CA Member No.: 2,104 Region Association: None 
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I am going to order some new wheels for my track car. 15 x 9. I understand backspacing. I think all 911 and 914/6 backspacing stock is 125mm. That is what I'd like. The manufacturer is listing three different ETs: 3mm, 10.6, 23.3. Which ET gives me the stock backspacing?
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| SirAndy |
Oct 8 2024, 10:24 PM
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Resident German Group: Admin Posts: 42,469 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
Found this in the info listed on an online calculator.
Not sure how accurate it is but it assumes that a 9" wheel is actually wider than 9" if you account for the wheel "lip". (IMG:style_emoticons/default/idea.gif) QUOTE Once you have your wheel width, it’s common practice to add an inch to it to account for the wheel’s outer lips before dividing it by two. |
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Posts in this topic
Krieger ET vs Backspacing Oct 8 2024, 06:14 PM
JamesM https://tiresize.com/wheel-offset-calculator/
htt... Oct 8 2024, 09:59 PM SirAndy
I am going to order some new wheels for my track ... Oct 8 2024, 10:05 PM sixnotfour A factory 15x9 is 3mm offset,and have a 117mm back... Oct 9 2024, 08:38 AM Krieger Thank you! So a 9" rim =228.6. 228.6/2... Oct 9 2024, 08:39 AM sixnotfour Backing the day you could buy a actual 245/50 -15 ... Oct 9 2024, 08:50 AM technicalninja
[url=https://tiresize.com/wheel-offset-calculator... Oct 9 2024, 09:18 AM BillJ One of my combos is 15x9 and I used minilites from... Oct 9 2024, 10:16 AM
Olympic 914 This chart may be some help.
It is for 911 Fuchs ... Oct 10 2024, 08:03 AM |
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