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EFV-8 Club Forum / General Ford Discussion / Diamondback Radial Tires

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Discussion Topic: Diamondback Radial Tires -- page: 1 2 3

OLDTMR

05-16-2017 @ 5:35 PM

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I have just installed a set of Diamond Back radials on my 40. Went out for a short ride this evening and I notice a difference in ride quality right away. We live on a pretty rough paved road . I was a bit disappointed to see they came from another country not USA. I believe there is less tread than the bias I took off which had a lot more miles . If I had not discovered cracks on the inside side wall I might have kept the bias on longer. I also assumed the others all had cracks and did not check. Come to find out the other three are in great shape ! I also talked with James at Diamondback a few times as well as e-mailing Coker reps. Thats my take whatever its worth ?

JayChicago

05-17-2017 @ 1:07 PM

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Here is a picture of a Diamondback Auburn, as it looks mounted on the car.

len47merc

05-17-2017 @ 3:59 PM

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Looks Great! Obvious difference in handling? Have you driven it at 70 mph and if so how'd it do in terms of smoothness/vibration?

Steve

Bob-93021

05-17-2017 @ 6:55 PM

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Jay, Those look great! Hard to believe that they are radials. What rim width are you using. Thanks - Bob

woodiewagon46

05-18-2017 @ 9:06 AM

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This topic has been covered several times on the H.A.M.B. For anyone that does not know what the H.A.M.B. is, it is a site dedicated to Hot Rodder's especially flathead people. I am not going to open a can of worms, but do your research before purchasing Coker tires. If you can access their site, I think you will find some very interesting issues with Coker tires.

len47merc

05-18-2017 @ 1:34 PM

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Plenty to find on the same subject on this forum as well woodiewagon46. Good advice you give regardless of the source, but plenty here on what you referenced.

Steve

JayChicago

05-19-2017 @ 11:17 AM

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Bob-93021: As far as I know the wheels are original to the car, which I believe are 4 inch width.

len47merc asked: "Obvious difference in handling? Have you driven it at 70 mph and if so how'd it do in terms of smoothness/vibration?"

There is obvious difference in handling; the radials squish and absorb road imperfections better than the my old bias-ply tires did. But I have to say that its not a dramatic difference. I probably could have saved $100 per tire if I went with bias-ply. Was it worth it? I don't know....if I had to make the decision over again, maybe I would just save the money.

I have driven on expressway at 55 MPH. Very smooth, no vibrations. I had the new tires mounted by a good tire shop that took the time to get each wheel/tire balanced well. That's probably an important factor. They told me that with one that needed excessive weights to get balanced, they broke it down again and rotated the tire 180 degrees.

BTW, you were kidding about the 70 MPH, weren't you? I like Mike Kubarth's clever comment from a previous post about mating a Columbia overdrive with a high rear-end: "I can imagine doing 75MPH+ in a '40 Ford. I can't imagine stopping and/or steering well in case of an emergency. "

len47merc

05-19-2017 @ 1:21 PM

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No I was not kidding about the 70 miles per hour - however, if you look at my reply to that same discussion thread as that with Mike's quotation you referenced you'll see I agreed with him and in other discussions I've posted that I never drive my '47 above 55 miles per hour on the speedometer for the exact same reasons. Many people who decide to put on radials do so not only for the change in handling but also so they 'feel' safer driving their cars, potentially with overdrive, at interstate speeds - something I would never do but is why I asked the question. I've also noticed that tires - particular bias plys - that ride fairly smooth up to 55 miles per hour start to show their deficiencies above that point and you can start to feel their inability to pass a road force test in vibration for various manufacturing reasons. Given all of this I was just curious if you did drive it at 70 whether they still rode smooth because again I've experienced bias plys that did just fine at 55 but when you tried to push them beyond that speed you started getting vibration.

Hearing your comment that one of your tires had to be rotated 180 degrees due to excessive weight required also is quite telling to me personally and good information for you to have shared.

Let us know your thoughts after you've driven them for a while. Thanks!

Steve

This message was edited by len47merc on 5-19-17 @ 2:30 PM

woodiewagon46

05-19-2017 @ 3:52 PM

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I live on Long Island and just trying to get off this Island is a task. Forget the traffic, but the tractor trailer "ruts" create a white knuckle trip. The radials made the "ruts" a lot easier to cope with and the ride a lot smoother.

len47merc

05-19-2017 @ 4:30 PM

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'The Thrill is Gone...!'

Steve

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