Date: Sat, 19 Nov 2016 14:05:34 -0500
Reply-To: Eric Wunrow <VW@ERICWUNROW.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Eric Wunrow <VW@ERICWUNROW.COM>
Subject: Re: Vredestein Comtrac Winter tire
In-Reply-To: <CACvdLxMT0Q0UOSiZfxejtcE1VJ0OCa27xsk8GA+ZG=sk6Pydhw@mail.gmail.com>
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I think you're referring to my "lengthy explanation?"
I mentioned that I'll go to D-rated again when replacing tires the next time, for added weight-bearing and blowout-reducing sidewall rigidity on dirt and all surfaces. At that time I will completely re-evaluate front vs. rear pressures based on small adjustments until the vans handles as good as I can get it to.
My pressure balance concepts are not as much about C vs. D ratings as they are about more pressure in the front vs. the rear — but I did detail the things to consider when determining what feels best.
Please try it and consider why the VW engineers came up with the pressures they did, tires have advanced amazingly since any of our vans were built, and potential legal issues are also considered when they determined the pressures. I'm not suggesting anyone exceed recommended pressures listed on their sidewalls, though did explain those are conservative per potential legal fallout as well. Think Firestone v. Ford Explorer issue years ago… which, in my view after witnessing many Ford Explorers driving waaaay too fast in the West, were as much about that vehicle apparently feeling more stable than other SUVs at excessive speeds as it was about a tire defect. But on that, that's a guess.
Eric
Eric Wunrow Pictures
303. 988. 8717
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On Nov 18, 2016, at 4:25 PM, David McNeely <davmcneely40@GMAIL.COM> wrote:
> Dan, thanks for the lengthy explanation.
>
> My comment that a C rated tire would be inappropriate referred to the 53
> psi recommendation that VW provided for my 1991 Volkswagen Vanagon GL
> Campmobile (full VW name for the vehicle provided because some list members
> insist on it -- Oh, Scott, it is the silver-tan color). A 50 psi maximum
> pressure tire would not be ok at 53 or higher psi.
>
> Though I am not privy to all the machinations and experiences that VW
> engineers have gone through as they make their determinations and change
> them for later models, I assume the increase in pressure recommendation is
> due to hard data, since they are engineers.
>
> mcneely
>
> On Fri, Nov 18, 2016 at 11:52 AM, Eric Wunrow <VW@ericwunrow.com> wrote:
>
>> Any news on your findings, Dan?
>>
>> Eric
>> Eric Wunrow Pictures
>> 303. 988. 8717
>>
>> VW@EricWunrow.com (for this list's emails)
>> EW@EricWunrow.com (for private messages)
>>
>>
>>
>> On Nov 12, 2016, at 1:03 PM, Dan N <dn92610@GMAIL.COM> wrote:
>>
>>> now this a very interesting concept... more psi in the Front than in the
>>> Rear...
>>>
>>> I will try that...
>>>
>>> thanks Eric
>>>
>>
>
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