 Spare tire sizes, 15 x 5.5 - 68 911 Porsche wheel |
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| emerygt350 |
 Jun 26 2026, 06:44 PM
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#1
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Advanced Member  Group: Members Posts: 3,655 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States  |
A friend gave me an ancient wheel to use as my spare. Currently it has a 165r15 Dunhill on it. The wheel is stamped 68 as well. Question to the community: is there a spare tire with near 24.9" diameter? Something like a 155/80R15 would match but I don't think they really seem to exist. Is there a way to find something like a space saver that would work on this? Anyone know a size that would work for me? The 185 is a bit big in the trunk too. Trying to use the free wheel.
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| Cairo94507 |
Jun 27 2026, 07:22 AM
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#2
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Michael Group: Members Posts: 10,683 Joined: 1-November 08 From: Auburn, CA Member No.: 9,712 Region Association: Northern California 
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Have you tried TireRack.com? They may have all the dimensions for their tires posted. If not, their technical support side is pretty good when you call them. (IMG:style_emoticons/default/beerchug.gif)
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| cgnj |
Jun 27 2026, 09:53 AM
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#3
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Senior Member Group: Members Posts: 732 Joined: 6-March 03 From: Medford, NJ Member No.: 403 Region Association: None
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I have one of those. I only use it to wash my windshield. I will check what is mounted on it. I believe it is 165-80-15
Simpletire.com Is in Philadelphia and gives a veteran discount so I buy from them when I can. I would just shop price. They sell no name tires. |
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| mgphoto |
Jun 27 2026, 01:45 PM
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#4
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"If there is a mistake it will find me" Group: Members Posts: 1,489 Joined: 1-April 09 From: Los Angeles, CA Member No.: 10,225 Region Association: Southern California |
Not totally sure but I believe the steel wheels have a different lug surface, the alloy wheels use a different lug, than the steel wheels. I believe that the compact spare tire used on the 944 has a rim that uses the same profile lug as the alloys.
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| 73-914 |
Jun 27 2026, 02:01 PM
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#5
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Senior Member Group: Members Posts: 686 Joined: 24-April 10 From: Albany UpstateNY Member No.: 11,651 Region Association: None
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QUOTE(emerygt350 @ Jun 26 2026, 08:44 PM)  A friend gave me an ancient wheel to use as my spare. Currently it has a 185rs15 Dunhill on it. The wheel is stamped 68 as well. Question to the community: is there a spare tire with near 24.9" diameter? Something like a 155/80R15 would match but I don't think they really seem to exist. Is there a way to find something like a space saver that would work on this? Anyone know a size that would work for me? The 185 is a bit big in the trunk too. Trying to use the free wheel. Looks like a 165 to me |
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| emerygt350 |
Jun 27 2026, 02:37 PM
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#6
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Advanced Member Group: Members Posts: 3,655 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
Thanks for catching that, yeah 165, corrected the above.
I tried tire rack but did not find anything. Will keep digging. |
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| emerygt350 |
Jun 27 2026, 05:37 PM
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#7
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Advanced Member Group: Members Posts: 3,655 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
What were the dimensions of the original spare?
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