Richie has been running a similar arrangement for a couple of years now. Had to get rid of the smaller sprockets on the primary drive as they were eating chains and gears.
I wish I was creative and mechanically inclined enough to make my own bike. I'm envious of BCD. Shoulda majored in Mechanical/Manufacturing like all my friends....I had to go and be a computer geek
I'm just not sure why you'd want to use twice as many sprockets and require both ends to shift simultaneously for the same range and steps as a one at a time rig.
I guess the front shifting may be a little better if the ratios are tight, but generally shifting both at once would seem likely to eliminate this advantage.
I'm sure you could use a standard shifter with a leverage multiplier at the business end. That Italian one seems to have alternating cogs. Is it a 21 speed or an 11?
BCD you were a gearbox pioneer in the late 90's but gave it away for the area suspension diversion . With things like over 80% of poll respondants saying they would prefer to buy a gearbox bike on Farkin.net recently you should not be chucking gearboxes in favour of big wheels. Big wheels are good but if you lose some swingarm angle the tradeoffs on big bump performance, pedalling and braking may lose their advantage. By all means do both, but don't walk away from the real performance and reliability gains of gearbox layout.
Switch to the english version of the site and view the videos and read the description. It is an 11 speed. The advantage of using a "one at a time rig" is that the chain is aligned at all times and the shifter becomes simpler and the whole arrangement can become more compact. As well the steps between ratios can be almost the same through the whole range of gears.
The Phaser is a prototype of which only two types exist so it is not possible to make a comparison with other similar systems because they are not very popular and have a very little distribution. The taiwanese V-Boxx of SR SunTour and the G-Boxx di Karl Nicolai, for the DH and the freeriding, have been relised few weeks ago. The system Honda of Shinja, Yashiaki, Takeshi, Naoki ( patent US 2004/0192480 A1 ), is used alone on the bicycles of the G-Cross team. Petespeed (inventor Petrus Van Der Linde, patent WO 02/08050 A1 , acquired a year ago from the Hayes) and Shimano (inventor Paul Thomasberg, patent EP 1 580 114 A2 ) are not in commerce.
Wait a sec, Shimano has a diab patent? Can someone look that up?
I'm Big wheels are good but if you lose some swingarm angle the tradeoffs on big bump performance, pedalling and braking may lose their advantage. .....
Well Alex,
youre reffering to the oldest story about patents. If you have spend serious time on this project better check if the system is actually covered in the USA, or just talk to the guy.
Patents are a mess and i know that from first hand. My suspension system has been ripped by some major manufacturers and i can do just nothing (add on that the neverending conflict between the EU & US patent offices and you'll surelly get a.. headache)
Well Alex,
youre reffering to the oldest story about patents. If you have spend serious time on this project better check if the system is actually covered in the USA, or just talk to the guy.
Patents are a mess and i know that from first hand. My suspension system has been ripped by some major manufacturers and i can do just nothing (add on that the neverending conflict between the EU & US patent offices and you'll surelly get a.. headache)
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