What year is your 1800? Since the TR6 debuted in 1969, maybe you brakes are
from another, more middle '60's, TR4 or MGB perhaps?
The TR6 are indeed 10.75 and 9 inch F/R.
Kimball Ayer
2500M #3723TM
> ----------
> From: Dr John Upham[SMTP:webmaster@ukmotorsport.com]
> Reply To: Dr John Upham
> Sent: Wednesday, November 29, 2000 2:28 PM
> To: TVR US mailing list; Polly, Craig J
> Subject: Re: tvr,s
>
> Craig,
> I have copied your enquiry to the US TVR mailing list in the
> hope that someone can shed some light on your problem.
>
> Polly, Craig J wrote:
> >
> > Hello John,
> > I've hit a problem with my 1800s rebuild. I have been
> > rebuilding the brakes and I have found that the new TR6 disc's that I have
> > bought do not allow the brake calipers to fit. The old disc's that I took
> > off are a good 1" smaller on the o/dia .Does this mean that I need the
> > caliper mounting plate from a TR6 ?.
>
> As far as I knew, TR6 discs are 10.75" in diametre but I'm no expert
> on TR6s.
>
> I am now a little concerned that I have
> > the correct uprights and steering arms as I have had a quick look at my
> > 2500m and it seems on quick inspection that the mounting holes in the
> > steering arms may be different.
>
> I think the Ms use different steering arms to Vixens.
>
> The rear brakes are also smaller than TR6
> > items which adds to my confusion.
>
> It adds to mine as well. I would expect 9" drums at the rear.
>
> > From your parts list the upright should be herald drum brake
> > these obviously allow the fitment of larger TR6 disc's but do they have any
> > identification features ?. The ones I have the steering arm passes through
> > them.
> >
> > Any advice would be helpful
> >
> > Regards,
> >
> > Craig
> >
> Lets hope someone else can help.
>
> Regards,
>
> John Upham, TVRCC Helpline.
>
>
> --
> Dr John Upham, The UKMotorSport Index,
> http://www.ukmotorsport.com/, webmaster@ukmotorsport.com,
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