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Same issues with a Robbins vinyl top fitted on my TR250. It is very tight,
there was not really a lot of extra material to make it less tight.
Installed myself, it looks good because no wrinkles, but best erected warm
and in the sun.
I make a point to store it with the top up every winter, if it shrank at
all I would never get it back on.
Greg Lemon
TR250
On Fri, Apr 11, 2025, 3:49=E2=80=AFPM Dave MacKay <dave@mdmackay.ca> wrote:
> I experienced the same with a vinyl tonneau I got from Robbins for my
> TR3A.
>
> I had a professional install it. The installer complained that it was too
> small. When we compared it to the previous tonneau we could see that it
> was noticeably smaller. I sent it back to Robbins and they replaced it
> with a slightly larger version. Even that was VERY tight. Eventually we
> got it fitted but it was a bear. It wasn't a job I'd want to tackle
> myself.
>
> My convertible top is so tight that it's almost impossible to erect unles=
s
> the car and top have been sitting in the sunshine on a hot day (which is
> exactly when I don't need it).
>
> I always contended that the darn things shrink. Dave's explanation of why
> that happens fits with my experience.
>
> Dave MacKay
> 10960 TR3A s/n 68639L
> near Toronto, Canada
>
> >From: Robert Rochlin <rrochlin@comcast.net>
> >To: dave northrup <dave@ranteer.com>, triumphs@autox.team.net
> >Subject: Re: [TR] TR6 top R&R
> >
> >The top looks great, but is a bear to get up when the weather is cool. I
> spoke to a very experienced >top installer years later about how tight th=
e
> top was going up and he told me that that the rear >section of the Robbin=
s
> cloth top is cut too small and it make sit hard to get the top perfect.
> He >said that vinyl tops were more forgiving.
>
> >From: DAVID MASSEY <dave1massey@cs.com>
> >To: dave northrup <dave@ranteer.com>, "triumphs@autox.team.net"
> >Subject: Re: [TR] TR6 top R&R
> >
> >Ditto.? For the same reasons.? Unless you are looking at doing several,
> there is too much learning >curve.
> >
> >Vinyl and the rubber layer on canvas tops all have a chemical called an
> elastomer.? This makes >the plastic flexible (stretchable) but this
> chemical will dissipate (evaporate) over time and the >material will not
> stretch as before.?
> >
> >This has worked for me on both vinyl and canvas tops.
> >
> >Correction.? I used the term "elastomer" when I should have said
> "plasticizer."
> >Another example:? Many years ago I was given a TR6 top by an acquaintanc=
e
> who bought it 20 >years previously but wrecked his car before he had a
> chance to have it installed.? In other words, >this top sat in his
> basement for 20 years before I had it installed.? This was the easiest to=
p
> to put >up and down in all my experience.? I believe it is because the
> plasticizers had all dissipated and >the top did not stretch when the
> installer got his hands on it.? So it didn't "shrink" after
> >installation.? It went up easily in any weather.??
> ** triumphs@autox.team.net **
>
> Donate: http://www.team.net/donate.html
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>
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>
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<div dir=3D"auto">Same issues with a Robbins vinyl top fitted on my TR250.=
=C2=A0 It is very tight, there was not really a lot of extra material to ma=
ke it less tight.<div dir=3D"auto"><br></div><div dir=3D"auto">Installed my=
self, it looks good because no wrinkles, but best erected warm and in the s=
un.</div><div dir=3D"auto"><br></div><div dir=3D"auto">I make a point to st=
ore it with the top up every winter, if it shrank at all I would never get =
it back on.</div><div dir=3D"auto"><br></div><div dir=3D"auto">Greg Lemon</=
div><div dir=3D"auto">TR250</div></div><br><div class=3D"gmail_quote gmail_=
quote_container"><div dir=3D"ltr" class=3D"gmail_attr">On Fri, Apr 11, 2025=
, 3:49=E2=80=AFPM Dave MacKay <<a href=3D"mailto:dave@mdmackay.ca";>dave@=
mdmackay.ca</a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I experi=
enced the same with a vinyl tonneau I got from Robbins for my<br>
TR3A.<br>
<br>
I had a professional install it. The installer complained that it was too<b=
r>
small. When we compared it to the previous tonneau we could see that it<br>
was noticeably smaller. I sent it back to Robbins and they replaced it<br>
with a slightly larger version. Even that was VERY tight. Eventually we<br>
got it fitted but it was a bear. It wasn't a job I'd want to tackle=
<br>
myself.<br>
<br>
My convertible top is so tight that it's almost impossible to erect unl=
ess<br>
the car and top have been sitting in the sunshine on a hot day (which is<br=
>
exactly when I don't need it).<br>
<br>
I always contended that the darn things shrink. Dave's explanation of w=
hy<br>
that happens fits with my experience.<br>
<br>
Dave MacKay<br>
10960 TR3A s/n 68639L<br>
near Toronto, Canada<br>
<br>
>From: Robert Rochlin <<a href=3D"mailto:rrochlin@comcast.net"; target=
=3D"_blank" rel=3D"noreferrer">rrochlin@comcast.net</a>><br>
>To: dave northrup <<a href=3D"mailto:dave@ranteer.com"; target=3D"_bl=
ank" rel=3D"noreferrer">dave@ranteer.com</a>>, <a href=3D"mailto:triumph=
s@autox.team.net" target=3D"_blank" rel=3D"noreferrer">triumphs@autox.team.=
net</a><br>
>Subject: Re: [TR] TR6 top R&R<br>
><br>
>The top looks great, but is a bear to get up when the weather is cool. =
I<br>
spoke to a very experienced >top installer years later about how tight t=
he<br>
top was going up and he told me that that the rear >section of the Robbi=
ns<br>
cloth top is cut too small and it make sit hard to get the top perfect.<br>
He >said that vinyl tops were more forgiving.<br>
<br>
>From: DAVID MASSEY <<a href=3D"mailto:dave1massey@cs.com"; target=3D"=
_blank" rel=3D"noreferrer">dave1massey@cs.com</a>><br>
>To: dave northrup <<a href=3D"mailto:dave@ranteer.com"; target=3D"_bl=
ank" rel=3D"noreferrer">dave@ranteer.com</a>>,=C2=A0 "<a href=3D"ma=
ilto:triumphs@autox.team.net" target=3D"_blank" rel=3D"noreferrer">triumphs=
@autox.team.net</a>"<br>
>Subject: Re: [TR] TR6 top R&R<br>
><br>
>Ditto.? For the same reasons.? Unless you are looking at doing several,=
<br>
there is too much learning >curve.<br>
><br>
>Vinyl and the rubber layer on canvas tops all have a chemical called an=
<br>
elastomer.? This makes >the plastic flexible (stretchable) but this<br>
chemical will dissipate (evaporate) over time and the >material will not=
<br>
stretch as before.?<br>
><br>
>This has worked for me on both vinyl and canvas tops.<br>
><br>
>Correction.? I used the term "elastomer" when I should have s=
aid<br>
"plasticizer."<br>
>Another example:? Many years ago I was given a TR6 top by an acquaintan=
ce<br>
who bought it 20 >years previously but wrecked his car before he had a<b=
r>
chance to have it installed.? In other words, >this top sat in his<br>
basement for 20 years before I had it installed.? This was the easiest top<=
br>
to put >up and down in all my experience.? I believe it is because the<b=
r>
plasticizers had all dissipated and >the top did not stretch when the<br=
>
installer got his hands on it.? So it didn't "shrink" after<b=
r>
>installation.? It went up easily in any weather.??<br>
** <a href=3D"mailto:triumphs@autox.team.net"; target=3D"_blank" rel=3D"nore=
ferrer">triumphs@autox.team.net</a> **<br>
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Archive: <a href=3D"http://www.team.net/pipermail/triumphs"; rel=3D"noreferr=
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=C2=A0 <a href=3D"http://www.team.net/archive"; rel=3D"noreferrer noreferrer=
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</blockquote></div>
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