Random part find: Indexed 5-speed freehub?
03-20-11, 04:52 PM
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Random part find: Indexed 5-speed freehub?
While digging through a parts box I found a 5-speed Shimano freehub with twist-tooth (I think - I don't have an indexed cassette handy to compare) indexed cogs. Each cog is clearly labeled with the tooth number and "Index." The largest cog says "MF-Z015 SIS 28 Low Index" on it.
The hub body is labelled "CA Shimano China," so I'm assuming this part isn't that old. Did Shimano switch from regular cogs to indexed ones at some point for all their replacement parts, or was there a 5-speed indexed system at some point? Has anyone tried one of these with an indexed Falcon shifter? It looks like the spacing between the cogs is the same, but the Falcon freewheel uses straight teeth.
The hub body is labelled "CA Shimano China," so I'm assuming this part isn't that old. Did Shimano switch from regular cogs to indexed ones at some point for all their replacement parts, or was there a 5-speed indexed system at some point? Has anyone tried one of these with an indexed Falcon shifter? It looks like the spacing between the cogs is the same, but the Falcon freewheel uses straight teeth.
03-20-11, 07:02 PM
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Is this a freewheel or a cassette mounted on a hub?
The -MF designation makes me want to thing it's a Mountain Freewheel; and the SIS Low Index makes me want to think that this was probably first mounted on a kid's Magna. Maybe a Next. We run into a few of these, they work *OK* but there's definitely better available.
Tooth shape has little to do with indexing in and of itself. The twist is there to make it easier to pass the chain up onto the next larger-diameter gear; the tip of the tooth is shaped to grab the sideplate and guide it into place. What matters more is the distance between cogs; the spacing. The derailleur will move as far as the shifter tells it to through cable tension: so what matters more is that the shifter pull-- and the derailleur stroke for that amount of pull-- match up with the cog spacing.
You will notice that Shimano has gotten away from twist-tooth on their cogsets for some time now, and use the HG ramps to facilitate the shift instead. Hope this helps.
The -MF designation makes me want to thing it's a Mountain Freewheel; and the SIS Low Index makes me want to think that this was probably first mounted on a kid's Magna. Maybe a Next. We run into a few of these, they work *OK* but there's definitely better available.
Tooth shape has little to do with indexing in and of itself. The twist is there to make it easier to pass the chain up onto the next larger-diameter gear; the tip of the tooth is shaped to grab the sideplate and guide it into place. What matters more is the distance between cogs; the spacing. The derailleur will move as far as the shifter tells it to through cable tension: so what matters more is that the shifter pull-- and the derailleur stroke for that amount of pull-- match up with the cog spacing.
You will notice that Shimano has gotten away from twist-tooth on their cogsets for some time now, and use the HG ramps to facilitate the shift instead. Hope this helps.
03-20-11, 09:09 PM
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It was still in the original box - no markings on it aside from the Shimano logo. It's definitely a freewheel (ISO threads, splined opening, etc,) and said parts stash is at least a decade old.
If the tooth design doesn't matter, I should be able to use it with the Falcon shifter instead of friction. It's going on an old 10-speed paired with either a Falcon or old Suntour derailleur, either of which would work better than the Eagle on there now.
If the tooth design doesn't matter, I should be able to use it with the Falcon shifter instead of friction. It's going on an old 10-speed paired with either a Falcon or old Suntour derailleur, either of which would work better than the Eagle on there now.
Last edited by sillygolem; 03-20-11 at 09:12 PM. Reason: Durp...freewheel, not freehub.
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