 Curiosity Kill The Cat, Why Tubes? |
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| JawjaPorsche |
 Nov 29 2018, 04:37 PM
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Advanced Member  Group: Members Posts: 3,463 Joined: 23-July 11 From: Clayton, Georgia Member No.: 13,351 Region Association: South East States  |
Someone posted this 1971 spec page.
I noticed the four had tubeless tires but the six had tubed tires. Can someone please share why they were different.. Attached image(s) 
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| johnhora |
Nov 30 2018, 08:31 AM
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Senior Member Group: Members Posts: 888 Joined: 7-January 03 From: Derby City KY Member No.: 107 Region Association: None 
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Early 911 wheels like the deep 6" Fuchs didn't have the tubeless "hump" formed on the inside of the rim. Supposedly this keeps the tire bead from slipping to the inside of the rim and sudden loss of pressure. This could happen with low pressures and severe cornering. So they used tubes like most early cars.
go hear for all you want on the patent https://patents.google.com/patent/US4606390A/en  |
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| Mark Henry |
Nov 30 2018, 09:59 AM
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#3
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
QUOTE(johnhora @ Nov 30 2018, 09:31 AM)  Early 911 wheels like the deep 6" Fuchs didn't have the tubeless "hump" formed on the inside of the rim. Supposedly this keeps the tire bead from slipping to the inside of the rim and sudden loss of pressure. This could happen with low pressures and severe cornering. So they used tubes like most early cars. (IMG:style_emoticons/default/agree.gif) All rims without an inner bead should have tubes. Yes you can get away without tubes but you're definitely taking a gamble. |
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Posts in this topic
JawjaPorsche Curiosity Kill The Cat Nov 29 2018, 04:37 PM
wndsrfr I'm going to guess it's the speed rating a... Nov 29 2018, 04:43 PM Tom_T IIRC the 5-lug steel wheel was a carry over from t... Nov 29 2018, 04:43 PM fixer34 If I recall, when I got my -6 with steelies and 18... Nov 29 2018, 07:52 PM
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