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Re: Coker whitewalls
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Home away from home
 
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Absolutely, those are 'gates', where the material fills into the mould around the core. On the whitewall they are trimmed close, leaving nubs, quite often they are left long on the tread's black sidewalls. You will notice a number of them arrayed around the entire surface. The synthetic rubber is quite viscous and does not flow easily so they use a whole series of small gates to ensure a complete fill of the tool. I am sure as hard as they try there is still 'short shots' that either leave areas unfilled, called 'voids' or areas that are not completely packed out leaving the tire unusable as it cannot be balanced properly. Unlike a lot of moulding processes there is no way to recover the material once vulcanized so any tires that are unusable have to be thrown into a machine to be ground into pellets that are used in other lower grade products, which explains their relatively high cost for the ones that work, as well as the tool having so many gates to try and avoid any issues.
BTW, your wheels look fantastic! Bob J.
Posted on: 2023/8/23 21:22
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Re: Coker whitewalls
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Quote:
Ah ok. That eases my mind. I thought there were some anomalies that weren't supposed to be there. I thought maybe I had gotten a bad batch of tires. Thank you for the quick response and thank you for the comment on my wheels. It's a long time waiting. Paul Attach file:  20230823_193445.jpg (329.01 KB)
Posted on: 2023/8/23 21:38
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Re: Coker whitewalls
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Looks great! I have Coker whitewalls as well, same dimples.
Interesting you have 6.50-16s. I also have a '37 120, and put on 7.00-16s, which is what I believe the manual called for. Now I'm wondering which is right.
Posted on: 2023/8/24 8:34
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1937 120 1092 - Original survivor for driving and continued preservation. Project blog / Registry
1937 115 1082 - Total basket case, partial restoration, sold Hershey 2015 Project blog / Registry |
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Re: Coker whitewalls
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Home away from home
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7.00 is correct for the 120.
6.50 is correct for the Six
Posted on: 2023/8/24 8:45
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West Peterson
1940 Packard 1808 w/Factory Air 1947 Chrysler Town and Country sedan 1970 Camaro RS packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=4307&forum=10 aaca.org/ |
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Re: Coker whitewalls
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Quote:
You're correct on size. I inadvertently ordered the 6.50's and didn't want to go through the hassle of returning.
Posted on: 2023/8/24 15:16
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Re: Coker whitewalls
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Home away from home
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In reality, more than likely it's the exact same tire size, as the reproduction manufacturers many times just change the number, and pour more rubber.
Posted on: 2023/8/25 6:07
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West Peterson
1940 Packard 1808 w/Factory Air 1947 Chrysler Town and Country sedan 1970 Camaro RS packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=4307&forum=10 aaca.org/ |
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Re: Coker whitewalls
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Quote:
That makes sense! Either way, the car looks great!
Posted on: 2023/8/25 7:50
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1937 120 1092 - Original survivor for driving and continued preservation. Project blog / Registry
1937 115 1082 - Total basket case, partial restoration, sold Hershey 2015 Project blog / Registry |
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