You can buy this off the shelf from a few UK suppliers:
CAMBRIDGE MOTORSPORT
TR6 Race Hub Assembly
Many owners who race a TR6 have experienced losing a rear wheel as the rear
hub shears from the driveshaft under the strain of competition. These steel
race rear hubs are made from modern race bred components and will not fail.
They require a new drive shaft with flange fittings at both ends to match
the new hub. The drive shafts we supply are produced with the best
competition quality universal joints and yokes and are fully balanced. Part
No
CM6010
CM6011
Description
TR6 race hub (pair)
Race driveshaft for above (each)
CAMBRIDGE MOTORSPORT LTD - SPECIALIST PARTS AND ACCESSORIES
http://dialspace.dial.pipex.com/cambridge.motorsport/parts-in.htm
TR Enterprises.
UPRATED DRIVESHAFTS
Race proven heavy duty shafts and universal joints. Replace standard shafts
and require no hub modifications.
TR4A-6 £195-00 2 req'D
Rebuilt standard hub unit £60-00 Exchange only
COMPETITION HUB ASSEMBLY
Increases in both power and grip levels on competition cars, combined with a
number of hub shaft failures have led to the development of a much stronger
hub assembly which fits to the original trailing arm with minor
modification. Bearing in mind the potential severity of an accident caused
by rear hub failure, these units must be considered essential for all
competitors.
TR4A-6 l/h £347-50
r/h £347-50 1 ea req'D
http://www.trenterprises.com/tre_pages/parts_catalogue.htm#ud
Bob Kramer
TR4, TR4A, TR6, 2.5 Saloon
rgk@flash.net
----- Original Message -----
From: <ingate@horizon.com>
To: <triumphs@autox.team.net>
Sent: Friday, September 15, 2000 11:34 AM
Subject: Re: TR6 Rear Hub Question
>
> All,
>
> Bob Lang sent me his thoughts on different rear hubs
> for IRS Triumphs, and forgot to cc the List. Well, here
> it is.....
>
>
> Hi Shane.
>
> > Near as I can figure, they're not available anymore.
>
> The parts were offered by SNG Barratt, and they sold out the Triumph line
> of parts to Moss Europe. I asked the Moss folks on two seperate occasions
> if they intended to have those parts available - they said "no". Not sure
> who the supplier actually was, but the axles (and CV joints) appeared to
> "adapted" to fit the TR. And the axle stub was either adapted Triumph or
> a new piece manufactured from a billet.
>
> At any rate, the option appears to be unavailable.
>
> > If you have a moment, could you tell
> > me a little something about the Corvair arrangement?
>
> I'll try.
>
> Group 44 and the West Coast folks (Kas Kastner et al) had noticed that
> the stock axles failed pretty regularly. In fact, if you look in the TR6
> Competition Preparation Manual, and read if closely, you'll see that they
> suggest swapping the axles out from time-to-time. I even recall something
> about swapping them out every 8 races (or was it 4)... anyway - an
> expensive proposition - even when the parts were "readily available".
> Anyone that had a Triumph back then understands the quote marks.
>
> At any rate, Brian Fuerstenau (sp??) or one of the others came up with a
> smashing good idea. The Corvair IRS axle stub is quite a lot beefier than
> the Triumph piece. All you had to do was make a new hub carrier out of
> aluminium, use some slightly different bearings (diff ID's for the axle)
> and then do "a few more things" to the axles and adapt to a beefier
U-joint.
>
> The extreme case is to swap in axles from another source - the Gp44 TR6
> vintage racer that most of us in the eastern USofA are familiar with
> reportedly uses axles from a Mercedes Benz 450 SL. However, I'm told that
> the stock axles are okay up to and a bit above 200 HP, which probably is a
> number that the vast majority of the Triumphs list will _never_ see on
> their TR6's. So you don't have to go too crazy on this thing.
>
> An added attraction of the Corvair conversion is that the lug pattern is
> 4 on 4.5" - just like our big TR's. Yippeee! You don't have to get new
> wheels.
>
> Lots of folks that have raced (or currently race) IRS Triumphs in the
> USofA use this setup. I have a copy of a copy of the plan from the Gp44
> garage somewhere in my house of the dimensions of the hub carrier. A
> compentent machinist should be able to mill you out a set - but I have no
> idea of what alloy to use or anything like that. The kicker is that the
> setup appears to be basically bullet-proof, with no failures reported
> that I'm aware of. And this is from serious SCCA racer types. Should way
> more than adequate for my simple needs. ;-)
>
> So, I'm about to try to track down a certain mid-west TR6 racer who
> apparently makes these things from time-to-time and get me a set so I
don't
> have to worry about my axles anymore.
>
> If you have a street TR6, this sort of modification is "wicked overkill",
> but if I get more info, I will post to the list about it.
>
> Bottom line - it'll cost about $1000 US to adapt, and it's not a "bolt
in".
>
> > I'm
> > about to go through the rear-end of Rags, and wanted to
> > get a little "creative".
>
> Well, if you can get a hub carrier made, you could adapt to just about
> anything. If you find a hub that has a 4 on 4.5" bolt pattern - even
better!
>
> Gotta find that drawing of the hub carrier I have... _somewhere_.
>
> > Cheers,
> > Shane
>
> regards,
> rml
> --------------------------------------------------------------------------
-----
> Bob Lang Room N42-140Q | This space for rent.
> Consultant MIT Computer Services |
> Voice: (617)253-7438 FAX: (617)258-9535 |
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