Radials or bias tires for my 35 s/c auburn driver?

  • Lee
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18 Dec 2006 05:24 #5945 by Lee
Lee created the topic: Radials or bias tires for my 35 s/c auburn driver?
Hi all you drivers:
Okay, recently drove the 35 S/C phaeton 2,000 miles to the west coast meet (and back). After getting home and the car safely in the garage, I by chance spotted one of my 30 year old tires (almost unused) had a chunk missing from the tread. Now don't say nothing about it, like it was dangerous, or something! Thinking back to the drive, I think I hear something hit the fender about 200 miles in to the trip--i thought it was just an extra nut or bolt from the rebuild or something not important! Now I think it was the tire. All in all, I guess the tires were okay even with the chunk missing, 'cause I did 70 mph most of the trip (don't tell the wife--I did a few miles at 75.


Okay, so I am cheap...and didn't replace the tires before the trip--I did road test them a couple of 100 miles. I thought, well hell, if those tires have held up on my local test trips of a couple of 100 miles, why not on the big one to CA.

So now I am deciding on the new tires and of course the question comes up about bias vs. radials for a driver car. ...I would like to hear from some of you driver types that use radials...I hear they work swift on keeping the car on a straight path on the road. Here in Oregon, I'm not the only cheap one; the highway department pavement has trenches (tire grooves) instead of lanes. These treanches make the bias tires hard to control when i do my higher speeds. By the way, the CA highways were not any better.

Now if you responders go with radials, I got some questions, yes I am finally getting to the questions (It is a club, so I am allow long winded stuff).
Q1: It seems there are two companies, Diamond and Corker. Evidently the Diamonds are made by taking regular radials, grinding off all the markings and vucanizing the wide whitewall on.
Q2: What about Coker? How are those made?
Q3: Is one better than the other?

Q4: I know I will need to buy special radial tubes? anybody know about this, seems like a gouge at $25 each...is there a cheaper way?

Q5: Last question: I understand the same size radials (225-75R-16) don't carry as much weight as the bias (6:50x16). If I get radials, should I run 225-75R-16 the equivent to 6:50x16's or go bigger, if bigger what size?

Q6: Say does that rubber cement really work, do you think I could find a chunk of tread and...,

So with that, please respond and guide this blind driver...

Lee in Oregon

Hey Curt, Merry Christmas...
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  • MICHAEL S SMITH
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18 Dec 2006 07:13 #5948 by MICHAEL S SMITH
MICHAEL S SMITH replied the topic:
LEE
GET THE RADIALS I HAVE THEM ON BOTH MY AUBURNS AND CORDS AND THERE IS NO COMPARISON IN RIDE OR HANDLING COMPARED TO EVEN THE BEST BIAS PLYS ( MOST OR WHICH THE MOLDS ARE SO OLD THEY ARE COMPLETELY OUT OF ROUND WHEN NEW!).
IF YOU HAVE A SIDE MOUNT THEY PROBABLY WON'T FIT IN THE WELL KEEP THIS IN MIND.
DIAMOND HAS AT LEAST 3 DIFFERENT TIRES THAT VARY IN PROFILE AND THEY CAN HELP YOU PICK THE ONE THAT BEST FITS YOUR NEEDS, THE ONE THING I DON'T PERSONALLY LIKE IN SOME RADIALS IS THAT THE PROFILE IS SO SQUARE THEY JUST LOOK WRONG .
YOU ACTUALLY BROUGHT UP ONE OF MY PET PEEVES, PEOPLE WHO SAY, MY TIRES DON'T HAVE THAT MANY MILES AND THEY ARE STILL GOOD EVEN THOUGH THEY ARE 10 OR MORE YEARS OLD ARE DECEIVING THEMSELVES BADLY, EXPOSURE TO AIR OVER THAT PERIOD OF TIME DETERIORATES THE COMPOUND, AND DRIVING ON THEM AT TODAYS HIGHWAY SPEEDS IS JUST LOOKING FOR TROUBLE. AND WHEN YOU LOOK AT THE VALUE OF OUR VEHICLES NOW, NOT SPENDING A THOUSAND BUCKS TO HAVE SAFE RELIABLE TIRES ON THEM IS, I HATE TO SAY, JUST DUMB.
YES YOU HAVE TO USE THE RADIAL TUBES , DUE TO THE SIDEWALL FLEXING OF THE RADIALS ETC. A REGULAR TUBE WON'T WORK.
HOPE I DON'T SOUND TO PREACHY, BUT YOU ASKED, TAKE IT FROM SOMEBODY WHO HAS HAD AN OLD BIAS PLY GRENADE GOING DOWN THE HIGHWAY GTE RID OF THEM IF YOU ARE DOING MUCH HIGHWAY DRIVING, OF COURSE IF YOU HAVE A TRAILER QUEEN THAT JUST RIDES FROM SHOW TO SHOW LOOKING FOR TROPHIES DON'T WORRY.

MICHAEL S SMITH ACD LIFE MEMBER #40
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  • Josh Malks
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18 Dec 2006 15:17 #5949 by Josh Malks
Josh Malks replied the topic:
Check ACD Newsletter 2003-3 regarding radial tires on ACD cars.

Check issue 2004-3, and several subsequent letters in the Mailbox column, regarding driving on old tires. Glad you're still here to tell us about it. (Coulda been hard on the Auburn, too <!-- s:? --><img src="{SMILIES_PATH}/icon_confused.gif" alt=":?" title="Confused" /><!-- s:? -->)

One more note. Do NOT use tubes in your Diamond Back radials. This strong advice comes from Michelin and Goodyear, who make most of the tires that DB converts to whitewalls. On wire wheels, seal the inside of the rims where the spokes come thru.

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  • Bill Hummel
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18 Dec 2006 20:53 #5953 by Bill Hummel
Bill Hummel replied the topic: Radials of course!
My vote is for Radials ... and NO tubes. The Diamondback Classics should stay on ok. They do on Cords at least.

MAKE SURE YOU ASK FOR THE BEAUTY BEAD OPTION. Brad Waken warned me about 3 times to get the Beauty Bead and since I didn't know what he was talking about ... I didn't. It looks much better with the bead than without.

Your car will handle like a new car. If you are going to drive the car, then get radials and enjoy it. If you are just going to do parades and other very short trips, then you can go bias-ply with tubes.

I don't know of anyone who has regretted switching to Radials.

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  • Lee
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18 Dec 2006 21:27 #5954 by Lee
Lee replied the topic: Josh/Bill Hod do you sealing the inside spokes...
Josh and others, How do you seal the spokes to be tubeless? Lee

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18 Dec 2006 22:26 #5955 by Mike Dube
Mike Dube replied the topic:
So none of you are concerned about the extra stress radials put on old rims that weren't designed to handle it? I understand that the new Cord wheels may be up to the task, but what about the rest of us? People used to dismiss 'radial tuned' out of hand, but as most of you know, there is a serious difference of opinion on this. You can't argue the fact that there is a lot more metal in steel wheels from the radial age than there is in older ones. If it didn't make any difference, why did the always cost concious manufacturers spend the money on stronger wheels? I wonder how some insurance companies would handle a claim due to wheel failure with radials mounted on non radial wheels?

When I had radials put on my 41 Packard years ago, the technician cautioned me. The car wasn't driven that much, and I never had any problems. Having said that, I am not sure I'd do it again, especially with a car that is driven extensively.

Mike
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