View Full Version : triumph sprung hub, any good?

10-09-2010, 10:10 PM
Picked up a pre unit project. Came with the sprung hub., What is the general consensus on these? do they work, are they any good? should I allow more fender clearance? just wondering . thanks.

10-10-2010, 9:23 AM
Picked up a pre unit project. Came with the sprung hub., What is the general consensus on these? do they work, are they any good? should I allow more fender clearance? just wondering . thanks.

If it is all complete and everything works well then they're ok, but if there is anything wrong with it they are a nightmare. They weigh a ton and when they are worn they feel a little squirrely when you ride them.

10-10-2010, 12:17 PM
torch pretty much said it all
,we would need to see the clearance between gaurd & tyre , theres not much travele in a sprung hub so?

10-10-2010, 2:38 PM
I just learned of sprung hubs a couple of weeks ago. From what I understand in addition to what been said above they're potentially lethal if you try to service them.

10-10-2010, 7:49 PM
ya thats what I figured. Ive heard the horror stories too. I wanted to run it , but probably wont. It's laced to a 16 right now and I want an 18 rear, so It'll just be that much more work. thanks.

10-12-2010, 8:30 PM
lots different than most rears,a little more probs gettin parts [brake shoes,bearings etc] they really are so stiff that its a lot like riding a rigid, but if its that "different' look your going for, then they are the shyte! they can be disassembled, just dont take the spring case inside apart [BIG warnings cast right into it] theres two different types, a mark1 and a mark2 , heres a mark2

10-12-2010, 10:14 PM
if ya dont want it send it to me:rolleyes: once there set up right the sprung hubs work pretty good an looks awsome

10-12-2010, 10:16 PM
if ya dont want it send it to me:rolleyes: once set up right the sprung hub work pretty good an looks awsome

10-13-2010, 6:07 AM
main problem i have with them is that a complete sprung hub rear wheel with tire/brake/axle is almost as heavy as a complete triumph motor. fuck that. wheels are where you want the lightest possible weight (unsprung/rotational mass). unless of course acceleration, cornering & braking dont matter.

10-13-2010, 12:53 PM
I guess i'll just take the outer cover off and take a peek. If it's good I might run it, but considering the weight, who knows. The answer is a definite maybe.

10-13-2010, 12:57 PM
by the way, that red trump is kinda cool. I think my hub is the same .although, It may have more of a ribbed cover. Im at work so i cant compare. thanks for the pics and help.

10-13-2010, 6:56 PM
really, i screwed up, thats a MARK 1 sprung hub, the ribbed one is the MARK 2, which,i assume, is somewhat improved......yea, they`r a little heavy, but look at it thisa way: with the sprung hub, all the weight EXCEPT the rim, tyre and outer hub ARE sprung weight! along with the frame,the spring box and axle your butt,etc,etc.
plus its just fuggin kewl! i build bikes for people to look at [stylewise, they DO have to run and ride correctly] when asked at the local events;"which bikes yours?" i simply answer: "the one with the crowd around it!" and its true...........

10-13-2010, 7:06 PM
here's a pic of mine

10-13-2010, 7:44 PM
nice! i like the way that wheel "fattens" up the back of the bike! does that pic show the rake correctly? some triumph frames were "deraked" at the factory, making them KILLER flatrackers!

10-13-2010, 8:43 PM
I wish I knew the history on that frame. I know its been chromed, which Im not too big on. In that picture, it does seem "deraked". not sure, I got lotsa work coming either way. looking forward to it.
Also trying to piece together a norton 16h girder for the front. hopefully It wont look too goofy.
Just split the preunit cases last night. 1954 6t w/ a unit topend. Ill keep youse guys posted. I just cant do the step by step build threads. love looking at them though. Here's some more shit that came with it. looks like the top of the neck has been cut too. It's a shame to think that someone cut it just to fit that japanese front end. who knows.


10-13-2010, 10:34 PM
that is not a de-raked frame, pre unit rigid frames had a 3 degree rake in the tripple trees. when you put non raked trees on there it will look like that. and the top of the neck was not cut off, the rigid frames had a removable bearing cup.

10-14-2010, 5:22 AM
great, that's good news! thanks alot

11-09-2010, 9:23 PM
Took the hub apart tonight. here are some pictures


11-09-2010, 11:53 PM
They should reintroduce then , shit there cool:killerjob: