I kind of thought this did go to the list, but if not, here it is:
----- Original Message -----
From: "Ted" <triumph66@gmail.com>
To: <pethier@isd.net>
Sent: Thursday, March 10, 2005 1:43 PM
Subject: Re: TR3A tires
> Hi Phil,
>
> I still think your advice is the best. Stick with 165s vs. 185s. I
> showed my 4.5" width rims to my mechanic, and he highly agreed with
> you, stick to 165s.
>
> I think you're excellent reply to me should be part of this dialogue
> above. Thanks again, Ted
>
> Here it is if you want to paste it up to the tire dialogue going on.
=================
> "> My question is: will 185/70s work for a 4.5" rim
>
> I think you are pressing your luck. A rule of thumb is that the rim
> width should be at least 70 percent of the section width.
>
> 4.5" is 114.3mm
>
> 114.3 is 62 percent of 185.
> 114.3 is 65 percent of 175.
> 114.3 is 69 percent of 165.
>
> The lower the aspect ratio, the more important this becomes, so
> 185-70s would give you more problems than a regular 185, and 185-60s
> would be more problemetic yet.
>
> You say these are the original 60-spoke Dunlop wires? I think they
> have about all they can do to deal with fresh 165s. I'm not saying
> that they won't work, but I am saying that the combination of
> over-wide tires for the wheels, the camber-challenged TR4 stock front
> end, and the whippy wire wheels probably add up to a setup that would
> not be any faster around the old skidpad than the 165s.
>
> I use 165s on my Dayton 4.5" wide x 15" wire wheels.
>
> If you really want to get the most out of 185 or wider tires, put on
> 6-inch Panasports.
>
> I have sticky 175-60-13 on 6-inch wheels for autocrossing my Lotus.
> I'd go to 185s if I could get what I wanted for compound and price.
>
> > and are there any clearance issues.
>
> I don't know. TR4 cars do seem to have a lot of wheel space. I have
> been told that you can put TR6-size stuff on TR4 cars, but have not
> tried it.
================
I think "Ted" <triumph66@gmail.com> wrote this bit
> P.S. When you get the tires mounted, try to get them to use the MAG
> machine, not the regular unit. If they have to use the regular
> machine, have them mount from the inside of the rim, not the outside.
> If they try to mount the "normal" way, they might bend your rims!!!!
================
Phil Ethier West Side Saint Paul Minnesota USA
1970 Lotus Europa 65/2597, 1992 Saturn SL2, 1993 Suburban, 1962 TR4 CT2846L
pethier@isd.net http://www.mnautox.com/ http://www.lotusowners.com
"TOOLS? Hell, any fool can work with tools. It takes a real mechanic to
work with this junk." -Orv Ethier, 1921-2004. First Shot Naval Vets, Pearl
Harbor Survivor.
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