[BrayDownhill]

some info on Be-Ones take on the gear box ideas.

http://www.beone-bikes.com/indexEng.html
and the same withs some pics: http://news.southerndownhill.com/html/2004_BeOne_Drive_Train.html


brock*

 

[CBJ]

Thank you for the link - I think gear boxed bikes is one of the most interesting developments in DH at the moment.

 

[profro]

Thank you for the link - I think gear boxed bikes is one of the most interesting developments in DH at the moment.

YES it is! Can't wait to lose the weak derailleur system.

 

[SuperSlow]

I like the idea of having a low center of gravity as well. Now to talk the gf into a gearbox bike

 

[CBJ]

Profo I do not know if you are being sacastic? But I have had great succes with my XTR derailleur since 2001 but I still think the gear box is an interesting option to explore if they can promise what they say on the B1 website.

My main concern with the gear box is reliability and how difficult and expensive it will be to fix it if it breaks. It would suck if you had to send the whole gear box in for repair compared to putting a spare derailleur a bike.

 

[zedro]

whats the rumor on the GT g-box bike? will it ever make it out?

 

[CBJ]

Accourding to the local GT rep - yes.

 

[zedro]

hmm, just noticed it said "can shift while coasting", meaning the bike may have to be in motion to shift. The system i was designing had the same criteria, wonder if its the same concept....

the frame/tranny layout appears to have the same requirement as well...

 

[Trond]

whats the rumor on the GT g-box bike? will it ever make it out?

It's been posted in british MBR before. approx 9" of travel, based on a Nexxus that if finally approved by Shimano. They one they had before was never given the "go" by Shimano.

 

[binary visions]

My main concern with the gear box is reliability and how difficult and expensive it will be to fix it if it breaks. It would suck if you had to send the whole gear box in for repair compared to putting a spare derailleur a bike.

Well, the theory is that a gear box is going to be far more reliable than a derailleur, and I would never buy anything that wasn't servicable by my own two hands in my own home. I don't see why small parts on a gear box would be as expensive as a new derailleur.

Of course, just like everything, I'm sure there will be plenty of growing pains where spare parts will be scarce and/or expensive...

 

[vitox]

It's been posted in british MBR before. approx 9" of travel, based on a Nexxus that if finally approved by Shimano. They one they had before was never given the "go" by Shimano.

are there several versions of that platform? i mean because that springs looks way too thin for a 9" bike and a fox.

 

[zedro]

It's been posted in british MBR before. approx 9" of travel, based on a Nexxus that if finally approved by Shimano. They one they had before was never given the "go" by Shimano.

thats way more elegant than the Nucleon, so much cleaner. It looks like the smaller size of the Nexus makes it a more ideal condidate for transplant as well.

 

[zedro]

are there several versions of that platform? i mean because that springs looks way too thin for a 9" bike and a fox.

look at the shock body length and exposed preload threads, looks like a 9.5/3.0 shock.

Also the shock linkage can really reduce the coil weight needed. My bike at 9.25" of travel with a 8.75/2.75 shock uses a 400# spring and i'm around 170lbs equipped.

 

[Transcend]

whats the rumor on the GT g-box bike? will it ever make it out?

Last i heard, it will be making its public debut at Ibike and will be available for purchase over the winter. It almost made it under sanjay for this race season.

 

[ÆX]

some pics.

 

[profro]

Profo I do not know if you are being sacastic? But I have had great succes with my XTR derailleur since 2001 but I still think the gear box is an interesting option to explore if they can promise what they say on the B1 website.

My main concern with the gear box is reliability and how difficult and expensive it will be to fix it if it breaks. It would suck if you had to send the whole gear box in for repair compared to putting a spare derailleur a bike.

No I am not being sarcastic. I seem to bend derailluers alot as do a lot of my friends. Just seem to be asking for trouble all suck out in the open like that. I can't wait for a gear box bike.

 

[ChrisRobin]

I'm assuming you don't have to fiddle with it as far as keeping it adjusted.

 

[Jm_]

I like the idea of having a low center of gravity as well. Now to talk the gf into a gearbox bike

Well, there won't be an advantage if it weighs a few more pounds, sure if it's going to have to weigh more it's better that the weight is as low as possible, but since you've increased the mass of the frame, you've made it less manuverable.

Anyhow while this is nice, I think a simple 7spd integrated hub in the back would make a world of difference, if it was not too expensive, not too heavy, and fairly durable, it would sell like hotcakes.

 

[dw]

From what I have been told, the Be One is also a Nexus based system (like the GT), but I do not know for sure. This would be as opposed to the Rohloff based systems in the Evil 2013i and Nicolai frames.

dw

 

[dw]

hmm, just noticed it said "can shift while coasting", meaning the bike may have to be in motion to shift. The system i was designing had the same criteria, wonder if its the same concept....

the frame/tranny layout appears to have the same requirement as well...

I would guess that they meant that you can shift while you are not pedaling. This one one of the goals for me when developing my gearboxes (Non Rohloff based units)

BTW, that frame in the pic would be incredibly challenging to keep straight after welding, The exact reason that the G-Boxx design doesnt use a similar looking setup.

dw

 

[zedro]

I would guess that they meant that you can shift while you are not pedaling. This one one of the goals for me when developing my gearboxes (Non Rohloff based units)

BTW, that frame in the pic would be incredibly challenging to keep straight after welding, The exact reason that the G-Boxx design doesnt use a similar looking setup.

dw

yeah that crossed my mind, but its actually an old concept design that i discontinued awhile ago so i'm not gonna worry about it too much

the system i was looking at could be shifted while coasting, but not at a standstill (oops, gave away too much ). Their basic frame layout and lateral dimensions give me the idea it could be the same deal, since it looks rather narrow for a tranny hub, and it doesnt seem to have the torsion arms, unless they super-modified everything. It would also be fairly cheap to implement, just alot harder to design around.