Discussion in 'Triumph (Classic)' started by Jerry Doe, Feb 14, 2018.
Don't just suggest it: show me an older twin shock swing arm.
No! I’m not looking for an argument here.
I was simply discussing the Mcandless ( and others ) involvement in swinging arm design.
If Velocete came first, that’s just splendid as far as I’m concerned TT !
Perhaps you were not probing for an argument there after all TT ?
I think I was a tad over sensitive there, read it in a way it was not intended.
I apologise sir.
I recently purchased a 'rider' 53 Thunderbird. Sprung hub ride is better than I expected. Front end is a bit klunky.
Question of front 7" half width. Can it be improved? currently it has standard shoes on a fixed pivot, are the self centering ones better? cheers John
There are two types of Triumph Sprung Hub - Mk1 and Mk2. The Mk2 has the ribs on the plate on the side away from the brake plate. They are not all bad, but never pull the spring box apart, the spring can kill when it jumps out. I can remember a very good rider who use to race a Sprung Hub Thunderbird against Manxes back in the fifties and won races.
A Sprung Hub Triumph is usually better performing than a Garden Gate Manx. But the Manx looks better.
Early 50s rigid framed (sprung hub or not) Triumph twins are the epitomy of beauty!
Since when did Marlon Brando ride a garden gate Manx ?!?
I reckon the sprung hub should be upgraded and make a comeback with modern components and proper damping
The unsprung weight could be substantially reduced not having a swing arm and shocks or monoshock to sling around!!!!
And of course with a wm4 rim it'd be a killer setup
“A killer setup” is one way of putting it.
Ha ha yep
Marlon Brando was a hoodlum. I liked Keenan Wynn better he rode Harleys - a man's bike. Wasn't the bike that Steve McQueen jumped the bob-wire with in The Great Escape a sprung hub Triumph for at least half the jump, then morphed into a motocrosser ?
Have you ever seen the Triumph GP with the full race kit ? - I think the sprung hub was part of it.
The race kit which was sold to the public for the 1953 Tiger 100 had the Mk2 Sprung Hub and skinny pipes (similar to the Triumph GP), tacho, two E3134 cams with R-type followers and twin carbs with a remote bowl clamped to the frame. My friend had a 1953 T100 with the full race kit, registered and on the road, complete with megaphones. When I first met him he wanted to race me while I was riding my side-valve 500cc Indian. In later years, we were both at Winton and he made sure he stayed on the other side of the circuit, away from me. I was riding an RD250LC Yamaha and he was on my old 500cc short-stroke Triton. He is dead now, so we won't get to play silly-buggers any more.
A 1962 swingarm TR6 with some Thunderbird cycle parts to make it look more like a military bike and, of course, it was Bud Ekins who actually did the jump.
Jumps......and lands with no film 'cut'.
Even if the bike had been a sprung hub Triumph, it probably would have been incorrect for the era.
If we go back to page 1:
"Hitler delayed the introduction of the Triumph sprung hub/wheel as it would've gone into production in 1941 if it hadn't been for WW2.
The original factory drawings were destroyed during the air raid on Coventry on the night of 14/15 November 1940 so had to be done again after the war ended."
On a fairly smooth race circuit a sprung hub Triumph is OK, but the plunger rear end on a GG Manx had provision for a friction damper. Neither of them had sufficient travel to get the bike handling in any way like a Featherbed Manx.
One of my projects (long term) is a 1951 TR5, I bought a Mark 2 hub for it just to be different,.
A mate, during his apprenticeship used to ride a Triumph to work in the sixties that had a sprung hub and he reckoned it was OK just had to keep the maintenance up to it.
He has given me a detail drawing of the jig so I can rebuild the hub, I see the price of the bearings has come down a bit?
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