FWIW, As defined in the respective '13 rulebooks:
SCTA page 23, 2.H TREAD: Tread is defined as the measurement from the
centerline of one tire to the centerline of the opposite tire of paired
wheels.
ECTA page 16, 2.H TREAD: Tread is defined as the measurement from the
centerline of one tire to the centerline of the opposite tire of paired
wheels. The minimum tread dimensions for all Vintage Category vehicles are
44 in. front and 50 in. rear. Special Construction Category vehicles are
not subject to this rule.
LTA Page 14, 2.J TRACK [FORMERLY TREAD]: Track is defined as the
measurement from the centerline of one tire to the centerline of the
opposite tire of paired wheels. The minimum track dimensions for all
Vintage Category vehicles are 44 in. front and 50 in. rear. Special
Construction Category vehicles are not subject to this rule.
Ed
On Thu, Oct 3, 2013 at 6:01 PM, <NT788@comcast.net> wrote:
> Or better Center of contact patch to center of contact patch.Burp sizzle
> pop!
>
> ----- Original Message -----
> From: NT788@comcast.net
> To: "Benn" <benn@sonic.net>
> Cc: land-speed@autox.team.net
> Sent: Thursday, October 3, 2013 2:50:47 PM
> Subject: Re: [Land-speed] Another B Dumb Question 5172...Tread width?
>
> I beg to differ, center to center is tread
>
> ----- Original Message -----
> From: "Benn" <benn@sonic.net>
> To: land-speed@autox.team.net
> Sent: Thursday, October 3, 2013 2:21:31 PM
> Subject: Re: [Land-speed] Another B Dumb Question 5172...Tread width?
>
> finally something I can answer...tread width is total outside-to-outside
> rubber on the ground. B So if your tire tread is 5", add that to track
> width
> and you've got, uh, 63 inches for tread width. B (Shwew, I can still
> add...)
> Benn
>
>
> -----Original Message-----
> From: land-speed-bounces@autox.team.net
> [mailto:land-speed-bounces@autox.team.net] On Behalf Of Larry Mayfield
> Sent: Thursday, October 3, 2013 2:08 PM
> To: land-speed@autox.team.net
> Subject: [Land-speed] Another Dumb Question 5172...Tread width?
>
> Hit delete now.... and no, you do not have to answer or reply... No, I am
> not seeking rule changes...just education......
>
> Ok, so I am continuously reading the short page and a half of MS rules,
> para 5.D.4, B B and I see that the front suspension can be narrowed to a
> "tread width" of B 27 inches. B Now my basic understanding of tread width
> is
> that width of rubber on a tire that has grooves in it. B Track Width, I
> understand as the width between center lines of tires on an axle. My front
> "track width" is about 58 inches (ie center of one tire to the other tire)
> while my "tread width" is about 5 inches as I measure it.
>
> What's correct? My curiosity abounds....
>
> mayf
>
> --
> ______________________________
> drmayf
> Worlds Fastest Sunbeam, period.
> 204.913 mph flying mile
> 210.779 mph exit speed
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