the gearbox thread
- Thread starter xy9ine
- Start date
Big companies rarely have any idea what's going on outside of their specific branch. Apparently ohlins america had never even heard of the technology in the DB shock until Cane Creek walked through their door with the proto, for example. And yes, DHS moved, I've seen pics of him riding in cali on MTBR.
thats sick man, care to elaborate on the drivetrain?
What happened to the inboard brake setup??
I don't know man, I'd like to see a closeup of the rear hub. That chain looks a little slack. I figure when the suspension compresses, the chain stretches, that derailleur looking thing probably keeps tension but I'd doubt the chain could stay on the cog on the hub unless there was some sort of little chain guide.
im definatly going to say that the "gearbox" or internal hub system deal is going to take over once they can make it more affordable, when the time comes that u can pick up a g-boxx frame for 2500 they will be every where
that is so true. the ironhorse yakuza whatever came with the same setup and has done nothing but cause problems. ohh and metzy that thing is sic man. nice to see the gearbox trend going to trail bikes.
After a little more testing I can say:This is how suspension should be. That rear wheel is so light and stiff, I can't even feel fast chatter bump sections, big hits just get swallowed.............. I could go on and on............ and on. Shifting is pretty sweet, smooth and oiled up. wiah I built this years ago.
Some one asked a question re the inboard brake, I chose to so traditional, keeps it a bit narrower, couldn't get the pedalling geometry I wanted with concentric drive sprocket/pivot.
Some one asked a question re the inboard brake, I chose to so traditional, keeps it a bit narrower, couldn't get the pedalling geometry I wanted with concentric drive sprocket/pivot.
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http://www.g-boxx.com/ has had a minor update. Check out the new PDF under G_BOXX 2. Quite informative.
g-boxx.org is down for an update. Can't wait to see what's new.
g-boxx.org is down for an update. Can't wait to see what's new.
looking forward to seeing the rohloff trigger shifters...
where are you finding this info? rohloff is coming out with a triggered 7speed?
from that pdf it looks like universal transmissions (aka nicolai) is coming out with a trigger for the 14spd rohloff guts (which could be huge in terms of aftermarket sales) as well as one for their own 7spd tranny. also heard that rohloff was working on a lighter unit (don't know if this entails a reduction in gears though).
Trigger shift on a rohloff would be awesome but for now I will just have to use the twist.
The twit shifter aint that bad. I just run a long grip with your hand only just touching the shifter. You then just move your hand a touch to change,no big deal. The Rohloff shifter is harder to shift than a normal twit shifter so I never have mis shifts anyways.
An up paddle on one side and down on the other would be the best set up but I don't think it would work due to the system.
An up paddle on one side and down on the other would be the best set up but I don't think it would work due to the system.
Quit talking about my sister like that.
It would work just fine. In fact I am suprised the Lahar guys haven't made one yet.
I'm pretty sure he's thought of that already, alot of stuff doesn't make it off the drawing board for some reason though
Is the clicker in the shifter? Then how would you make each side register the click when they were'nt under load?SIS style possibly. It's late here and I'm half cut so I'll think about it tomorrow.
good work metzy, cant wait for a test ride.
With the shifter you need a ratchet system that decouples when the shift lever isn't being twiddled. So the cable spool can turn the other way. you could put one on each bar if a cable tensioning spring was on the spool to keep it all sharp.
With the shifter you need a ratchet system that decouples when the shift lever isn't being twiddled. So the cable spool can turn the other way. you could put one on each bar if a cable tensioning spring was on the spool to keep it all sharp.
The Italians:
A bit of gearbox racing news from the weekends NZ nationals on xy9ine's xmas fibre thread.
A bit of gearbox racing news from the weekends NZ nationals on xy9ine's xmas fibre thread.
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Hi Rob
Once again, looking superb. Any chance of posting a total weight?
The fact that you're 17.5 foot tall means I'd never be able to reach the pedals - so tell me again how good it is again, and when you're taking orders...
cheers
Sam
thats pretty hot
Regarding that pdf file, the thought of a trigger shifter excites me!! IF Rohloff had made one a long time ago, more people would be using the hubs today. I'm looking forward to see how that shifter works.
Good work Dodzy winning the on the day entry pro race at the NZ nats for the gearbox revolution. 1 sec victory over Lahar m8 privateer Scott Sheldon.
Great to see another Gearbox bike winning races.
Love to hear of any other race success from the leading edge.
Great to see another Gearbox bike winning races.
Love to hear of any other race success from the leading edge.
Unfortunatly Aaron he wasn't running his gearbox bike. He was on a GT DHI. His one needs new bearings
oster_oops: 
Ain't it great!
you back in rotovegas?
Looks like Shimano also has a diab patent. Crank-sprocket is stationary while the cogset moves. Neat.
http://www.freepatentsonline.com/20050215367.pdf
http://www.freepatentsonline.com/20050215367.pdf
Millyard racing:
From NSMB:
Sea Otter is like Mardi Gras for the bicycling set . You'll see folks walking around with their mountain bike from 1987 - from Ritcheys to Bridgestones - wearing the now threadbare lycra they wore then. The proximity to San Francisco means there are lots of freaks - and that's not a dirty word within 100 miles of the Bay Area. Some of the characters hail from farther afield though and I bumped into a trio of Brits pushing around a very interesting DH bike. Stephen Millyard is one of the luckier young racers around. His father likes to design and manufacture products for his bike. Earlier he put together a double disc front wheel and since his ambitions have blossomed into a complete frame.
It sports a derailleur-less drivetrain similar to that on GT's monster IT-1 but it manages to look much more elegant while encasing the chain in the left side of the swingarm. A Shimano 8 speed Nexus hub performs the shifting duties and the entire package comes in at around 42 lbs (the IT-1 is around 50). The rear shock is Millyard built one-off as well and was designed by one of Stephen's dad's comrades. When I asked the two mad scientists their chosen occupation I was met with "best not ask that question." All right then. Stephen told us he loves the bike with the proprietary shock so much that he won't go back to something built by Fox or Marzocchi. Let's hope this is a step towards the death of the venerable derailleur - the mountain bike's achilles heel.
From NSMB:
Sea Otter is like Mardi Gras for the bicycling set . You'll see folks walking around with their mountain bike from 1987 - from Ritcheys to Bridgestones - wearing the now threadbare lycra they wore then. The proximity to San Francisco means there are lots of freaks - and that's not a dirty word within 100 miles of the Bay Area. Some of the characters hail from farther afield though and I bumped into a trio of Brits pushing around a very interesting DH bike. Stephen Millyard is one of the luckier young racers around. His father likes to design and manufacture products for his bike. Earlier he put together a double disc front wheel and since his ambitions have blossomed into a complete frame.
It sports a derailleur-less drivetrain similar to that on GT's monster IT-1 but it manages to look much more elegant while encasing the chain in the left side of the swingarm. A Shimano 8 speed Nexus hub performs the shifting duties and the entire package comes in at around 42 lbs (the IT-1 is around 50). The rear shock is Millyard built one-off as well and was designed by one of Stephen's dad's comrades. When I asked the two mad scientists their chosen occupation I was met with "best not ask that question." All right then. Stephen told us he loves the bike with the proprietary shock so much that he won't go back to something built by Fox or Marzocchi. Let's hope this is a step towards the death of the venerable derailleur - the mountain bike's achilles heel.
Impressive bike only thing is the BB looks a little high but clean lines. Would love to give it a try. Can't believe they build their own shock!
some impressive work on the millyard. custom shock = wow. i'd question the logic of placing the weight of the gearbox on the swingarm, but it is a nice clean design. here's the double disc:
a serious custom ride.....very nice.