there's been speculation that his orion suspension design (moto based) might be developed for a gearbox application - ie, a new dw-esque suspension layout more gearbox friendly than the current design.
the gearbox thread
- Thread starter xy9ine
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really? ah well poo. I can wait though.
wow this post has gone in so many directions its awsome
It's funny how similiar all of the gboxx/vboxx bikes are smiliar, due to the need to use the box as a structural member and get the cranks in the right place.
Has anyone done a non single pivot version yet?
Has anyone done a non single pivot version yet?
I was just thinking the same thing.
Having a gearbox standard definitely allows for more companies to jump on the boat, but it sure does a good job of making it more difficult to design the suspension geometry around the gearbox. A simple, relatively lightweight internally geared hub keeps sounding better...
Has anyone messed around with a Sturmey-Archer XRK8 yet? Or is it destined to blow up the first outing?
Sturmey Archer stuff is pretty decent, but not designed for the stresses we would put on it. They also own sunrace, so maybe a JUJU branded gearbox would be in order?
There was that Lawill style gear box bike at Eurobike. Can't remember the name, but pics were posted here.
BTW, like to add that so far, I much prefer visually the look of the Suntour V-Boxx for its lower profile.
Yeah, rotec make a lawill bike i have some pics i will post tomorrow.
dead, just got back
alex
:biggrin: 
lil sampler of the Versus Gearbox Bike in the prototype phase
One more to add to the list
One more to add to the list
that right there is going to be a winner...the pivot is a little low for me, especially with a gearbox, but I can see a TON of people picking one of those up for the season...
o....m.....f......g..... 
That's sooo hawt... I need to start saving now and ride the piss outta my current Rotec....Then I'll have to upgrade....
I'll have to go over to Sully's once he's back from IB and get the 411 on this bad boy!!!
That's sooo hawt... I need to start saving now and ride the piss outta my current Rotec....Then I'll have to upgrade....
I'll have to go over to Sully's once he's back from IB and get the 411 on this bad boy!!!
come on, no full bike pics?! I know I know, beggars can't be choosers!
If none are posted by the time I go over to Sully's, I'll try to convince him to let me snap a few.
The rotec bike is super cool, it was a fun project to be part of.
I do believe that he's working toward making the non-gearbox frame "any shock" compatible for this next production year, so I hope it carries over to the gearbox version.
That's what I was referring to as well...but in a more comprehensive nature. It looks tight now cause it's a frankenbike just like the original RL9 proto. It's all peiced and welded together. The original proto frame was 15 lbs. and had whacky pieces everywhere. Just the fact that a DHX fits on there now (that's a medium in the photo I believe) bodes well for when the production model comes to fruition. *shrug* Time will tell.
this one is only a point of concept, there still working out some details to get to the full proto. your right on the size it was designed to be a medium
li
is that roxy from ibis he is talking too?
He's givin' her the "finger through the CD" look too....Danger!!
Definitely not Roxy. Stalker.:biggrin:
wow and it keeps going
The girl is Vivian. She works for Versus and owns it with Herb
So Rotek bag out Yeti for not using Mert's concentric BB design, then entirely change the pivot location to suit a heavy gearbox design??
It looks as though they have really slapped that together, how much thought / calculations have theyu put in to the axle path etc?
It looks as though they have really slapped that together, how much thought / calculations have theyu put in to the axle path etc?
its still a concentric design, although concentric to the secondary drive.
axle path is gonna be pretty damn similar to the rest of the high pivots it looks...
no such thing, Lawills have a fairly marginal variation from a single pivot.
i'm wondering about the lack a brake linkage (floater or otherwise), big no-no. Love the machining and overall design tho
Looks as if the back side of the left crank had to be machined down to clear the frame . . .
The Rotec would appear to use the same sort of tiny brake arm that the Yetis used,transfering brake force to bottom swingarm.
It seems to have a chain tensioner indicating that it would have a similer wheel path to a high (BB7,RaceLink,Lahar)pivot bike,so yes rear to verticalI'm guessing. Best design for the Suntour box yet i recon,looks heavy but I'm sure it's a proto.
The Centurion pictured has no chain tensioner indicating that it in theory is just a single pivot,pivoting around the middle of the gearbax output sprocket at top.
It seems to have a chain tensioner indicating that it would have a similer wheel path to a high (BB7,RaceLink,Lahar)pivot bike,so yes rear to verticalI'm guessing. Best design for the Suntour box yet i recon,looks heavy but I'm sure it's a proto.
The Centurion pictured has no chain tensioner indicating that it in theory is just a single pivot,pivoting around the middle of the gearbax output sprocket at top.
The Rotec design would require the tensioner no matter if the wheelpath is rearward or not...
The Lawwill design makes no sense to me in its conventional application, and even less when combined with a gearbox. The Rotec would not perform any differently if it was a concentric single-pivot, but it would not require the chain tensioner to take up chaingrowth.
Yes true,good point. There would be a slightly bigger arc due to the top arm more rearward front pivot but without being able to see where the top rear pivot is and how long the top arm is it's hard to say,a full side photo would be better to determin this. If the bottom arms rear pivot was lower and further away from the axle it would give a bigger wheel travel arc especially if the top arm was long,but ground clearance issues would be no better or worse than a rear deraileur. None the less it would offer at least a slightly more rearward action.Chain growth would then become an issue,and affect the suspension,so would chain induced anti squat. I think a high single pivot with a roller to relocate the drive output would work better and weigh less if the G-Box housing would permit the chain to exit upwards,you'd then have less chain purchase on the G-box sprocket though. Points for trying.Tyre clearance looks tight,near the shock.
As other have said, it is still concentric to the output. Same as it is now.
I guarantee that frame is slapped together. It is IB and it is a working concept. The orig. RL 9 was the same way. Chopped and welded together and painted on a balcony in vegas the night before IB. That just seems to be the way that Sully works. Give it a little time and it will be refined, lighter, and much more polished, if history is any indication.
It's not a Lawwill, it's a true parallelogram linkage with the CC at the drive output (note the lack of chain tensioner). It won't need a brake linkage/floater.