The Sachs 3x7 and 3x8 internally geared hubs were almost indestructible, even being used on tandems...
I gather SRAM has now replaced the original Sachs part with its own dualdrive component which is meant to have better shifting under power - suggesting to me that it has undergone a major redesign & may be either stronger or weaker than the original part. Does anyone know if this new part is as bombproof as the old one? I'm interested to know whether it may be suitable for use in a tandem with vertical dropouts.
I gather SRAM has now replaced the original Sachs part with its own dualdrive component which is meant to have better shifting under power - suggesting to me that it has undergone a major redesign & may be either stronger or weaker than the original part. Does anyone know if this new part is as bombproof as the old one? I'm interested to know whether it may be suitable for use in a tandem with vertical dropouts.
Vertical dropouts, at least, should not be an issue given that you're already running a rear cassette plus derailer.
The Sachs 3x7 and 3x8 internally geared hubs were almost indestructible, even being used on tandems...
I gather SRAM has now replaced the original Sachs part with its own dualdrive component which is meant to have better shifting under power - suggesting to me that it has undergone a major redesign & may be either stronger or weaker than the original part.
I doubt there has been any change to the gearhub other than perhaps cosmetic revisions. All other SRAM gearhubs I have seen are internally unchanged from when they were Sachs products.
The improvements in shifting which have been claimed are due to a pulley incorporated into the external shifting mechanism AFAIK, and not to any changes in the hub gearbox.
The Sachs 3x7 and 3x8 internally geared hubs were almost indestructible, even being used on tandems...
I gather SRAM has now replaced the original Sachs part with its own dualdrive component which is meant to have better shifting under power - suggesting to me that it has undergone a major redesign & may be either stronger or weaker than the original part.
Chalo Colina theorized:
Quoted message said:
I doubt there has been any change to the gearhub other than perhaps cosmetic revisions. All other SRAM gearhubs I have seen are internally unchanged from when they were Sachs products.
The improvements in shifting which have been claimed are due to a pulley incorporated into the external shifting mechanism AFAIK, and not to any changes in the hub gearbox.
Nope, the hub's pretty much completely redesigned inside. Supposedly considerably more robust, and the 3 x 7 was no shrinking violet.
Sheldon "I've Seen The Innards" Brown +------------------------------------------------------------------+ | We must sail sometimes with the wind and sometimes against it, | but we must sail, and not drift, | nor lie at anchor. | --Oliver Wendell Holmes Sr. | +------------------------------------------------------------------+ Harris Cyclery, West Newton, Massachusetts Phone 617-244-9772 FAX 617-244-1041 harriscyclery.comharriscyclery.comOpen ↗ Hard-to-find parts shipped Worldwide captainbike.comcaptainbike.comOpen ↗sheldonbrown.comsheldonbrown.comOpen ↗
I doubt there has been any change to the gearhub other than perhaps cosmetic revisions. All other SRAM gearhubs I have seen are internally unchanged from when they were Sachs products.
Nope, the hub's pretty much completely redesigned inside. Supposedly considerably more robust, and the 3 x 7 was no shrinking violet.
I stand corrected.
Have you heard of any plans to do a similar treatment to the 7, 5, or 3-speed gearhubs? I've gotten my hands on new specimens of all three relatively recently, and they were clearly the same ol' stuff as always.
Have you heard of any plans to do a similar treatment to the 7, 5, or 3-speed gearhubs? I've gotten my hands on new specimens of all three relatively recently, and they were clearly the same ol' stuff as always.
The Sram 7-speed was re-designed maybe 2-3 years ago, completely different ratios, more evenly spaced gears.
Shimano and Sturmey-Archer are working on 8-speed internals. The Shimano one is expected this fall, not sure about the Sturmey-archer.
Sheldon "Epicyclic" Brown +-----------------------------------------------------+ | Once more upon the waters! yet once more! | And the waves bound beneath me as a steed | That | knows his rider. Welcome to their roar! | Swift be their guidance, wheresoe'er it lead! | Though | the strain'd mast should quiver as a reed, | And the rent canvas fluttering strew the gale, | | Still must I on; for I am as a weed, | Flung from the rock, on Ocean's foam to sail | Where'er | the surge may sweep, | the tempest's breath prevail. | --Lord Byron Child Harold's Pilgrimage | +-----------------------------------------------------+ Harris Cyclery, West Newton, Massachusetts Phone 617-244-9772 FAX 617-244-1041 harriscyclery.comharriscyclery.comOpen ↗ Hard-to-find parts shipped Worldwide captainbike.comcaptainbike.comOpen ↗sheldonbrown.comsheldonbrown.comOpen ↗
In message <[email hidden]>, Sheldon Brown <[email hidden]> writes
Quoted message said:
Chalo Colina asked:
Quoted message said:
Have you heard of any plans to do a similar treatment to the 7, 5, or 3-speed gearhubs? I've gotten my hands on new specimens of all three relatively recently, and they were clearly the same ol' stuff as always.
Shimano and Sturmey-Archer are working on 8-speed internals. The Shimano one is expected this fall, not sure about the Sturmey-archer.
reports that the 8 speed Sturmey-Archer will be launched at CYCLE 2003 in London. The CYCLE show runs from 24th to 28th September.
I don't know what this means about when you will be able to buy one and where. The Sunrace made 3 speed (newish non-AW internals) and 5 speeds are listed at St John Street Cycles in the UK and Harris in the US so let's hope they will be getting the 8s too?
