found some rare stuff ... chainring, brake and stem ....
05-20-14, 06:26 AM
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found some rare stuff ... chainring, brake and stem ....
found something rare or something never thought it exit .....
sanyo Canti Brake, sanyo making brake ?
Shimano Adamas single chainring, for me is rare. (shimano FC-ad11)
Anlun MTB/Touring stem, all the time i thought anlun only make bmx stuff ...
sanyo Canti Brake, sanyo making brake ?
Shimano Adamas single chainring, for me is rare. (shimano FC-ad11)
Anlun MTB/Touring stem, all the time i thought anlun only make bmx stuff ...
05-20-14, 08:53 AM
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IIRC, Shimano combined their FFS (Front Freewheel System) with that Adamas crankset.......
I think my younger brother's Motobecan Profil bike had the system with that crankset...
I think my younger brother's Motobecan Profil bike had the system with that crankset...
05-20-14, 10:15 AM
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05-20-14, 10:48 AM
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05-20-14, 12:47 PM
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Looking at the photos of that cast chainring, it appears to be Shimano's first use of their patented Octalink spline technology.
I would love to see a cast-as-one quad-chainring (to take the place of modern triples).
With closer ratio spacings, the rings could also be closer together for minimal width, and the unit construction could afford great rigidity with minimal metal for lower weight.
I imagine that the shifting might also be improved with the smaller ratio gaps, such that one of today's electric front derailers could keep the chain on the best chainring for minimal chain angling, all selected electronically.
Less chain angling could mean that the chainrings would need less rigidity, so the crankset might remain very light, with a reduction in drivetrain friction.
None of the electric gruppos has yet to offer even a triple option btw, but they could have a "44-speed" drivetrain on the market in short order with this approach, perhaps with the shifters coordinated front-to-rear for the most intelligent ratio sequence, using but a single shifter!
An actual 17 sequential gear ratios could thus be possible and practical if they can overcome the problem with automatic front shifts interrupting power flow during hard pedaling efforts, so possibly a return to a Browning system of front shifting might have a future in this scenario.
I threw this out there in a discussion with a Shimano rep not too long ago.
I would love to see a cast-as-one quad-chainring (to take the place of modern triples).
With closer ratio spacings, the rings could also be closer together for minimal width, and the unit construction could afford great rigidity with minimal metal for lower weight.
I imagine that the shifting might also be improved with the smaller ratio gaps, such that one of today's electric front derailers could keep the chain on the best chainring for minimal chain angling, all selected electronically.
Less chain angling could mean that the chainrings would need less rigidity, so the crankset might remain very light, with a reduction in drivetrain friction.
None of the electric gruppos has yet to offer even a triple option btw, but they could have a "44-speed" drivetrain on the market in short order with this approach, perhaps with the shifters coordinated front-to-rear for the most intelligent ratio sequence, using but a single shifter!
An actual 17 sequential gear ratios could thus be possible and practical if they can overcome the problem with automatic front shifts interrupting power flow during hard pedaling efforts, so possibly a return to a Browning system of front shifting might have a future in this scenario.
I threw this out there in a discussion with a Shimano rep not too long ago.
05-20-14, 02:01 PM
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IIRC, the Adamas crankset, was called out as a "light alloy" cranakset by Shimano. It was surprisingly light, but I think the crank was just cast and not forged, so there might be some trade-off on ultimate strength of the component. Certainly not "competition grade" but good enough for most of the cycling public, I guess....
05-21-14, 12:23 AM
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