Anyone have a good knowledge of freewheels (shimano)
I have picked up a set of wheels with a second hand bike.
the rear wheel is a shimano hub with an old style 7 speed screw on freewheel. note not a cassette type, incase i got terminology mixed up.
Anyway i wish to remove the freewheel to rebuild the wheel (if the hub us worth it).
Now i am familiar with some types of freewheel and fittings but not this one. there is no splines on the inner face for using a tool, and no visible pins, slots or otherwise on the outer that i can see would allow a tool in. there are (and i'll try and describe this as best possible) two obvious components on the outer face of the freewheel, the inner part has the shimano logo and i assume the inner pawls inside, the outer part is the smallest sprocket. between these, and circling the circumference between each component is a series of slots, but the width of each slots is less than 1mm. i dont see how any tool could be used on this and certainly have not seen any of the freewheel tools available that have this set-up.
as i would be rebuilding the wheel, i stripped the axle/cones/bearings out to regrease and service them. now after removing the internals, it appears that the inner part (see previous paragraph) seems to cover the bearings. now i didn't expect the drive side bearings to be so close to the axle end. considering its 7 speed i expected them to be nearer the drive side flange. this made me think that maybe the hub/freewheel combination may have been a precursor to the freehub, where the bearings are moved right to the axle end. but that means that the sprockets would need to be mounted individually. was there ever a hub that took screw-on (individual) sprockets?
anyone ever come across such a beast. the shimano hub is an unbranded one. my thought were that as it was unbranded that maybe nothing was replaceable, but i cant imagine that the sprockets can't be taken off. it would also make it impossible to install new spokes.
Any thoughts? hope it makes sense. my need to back up with photos, will try and sort some out
the rear wheel is a shimano hub with an old style 7 speed screw on freewheel. note not a cassette type, incase i got terminology mixed up.
Anyway i wish to remove the freewheel to rebuild the wheel (if the hub us worth it).
Now i am familiar with some types of freewheel and fittings but not this one. there is no splines on the inner face for using a tool, and no visible pins, slots or otherwise on the outer that i can see would allow a tool in. there are (and i'll try and describe this as best possible) two obvious components on the outer face of the freewheel, the inner part has the shimano logo and i assume the inner pawls inside, the outer part is the smallest sprocket. between these, and circling the circumference between each component is a series of slots, but the width of each slots is less than 1mm. i dont see how any tool could be used on this and certainly have not seen any of the freewheel tools available that have this set-up.
as i would be rebuilding the wheel, i stripped the axle/cones/bearings out to regrease and service them. now after removing the internals, it appears that the inner part (see previous paragraph) seems to cover the bearings. now i didn't expect the drive side bearings to be so close to the axle end. considering its 7 speed i expected them to be nearer the drive side flange. this made me think that maybe the hub/freewheel combination may have been a precursor to the freehub, where the bearings are moved right to the axle end. but that means that the sprockets would need to be mounted individually. was there ever a hub that took screw-on (individual) sprockets?
anyone ever come across such a beast. the shimano hub is an unbranded one. my thought were that as it was unbranded that maybe nothing was replaceable, but i cant imagine that the sprockets can't be taken off. it would also make it impossible to install new spokes.
Any thoughts? hope it makes sense. my need to back up with photos, will try and sort some out
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Comments
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i think i have got you but pics is almost a must.
there were some odd balls about have you looked at sheldons and parks webbys?
as both have some good info and pics. sheldon more so on the odd balls.
or it could be a cassette that used the small cog as a lock ring?
"Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
Parktools :?:SheldonBrown0 -
If the bearings which the axle runs on are on the outside of the sprockets as you describe, then it's almost certainly a freehub, not a freewheel. Small cog as lockring is a good bet - I once had one of those.0
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your both right, turns out to be a freehub after all, and now removed with ease
thanks very much0 -
happy to help."Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
Parktools :?:SheldonBrown0 -
You probably have a UniGlide hub then.
Keep hold of that lockring
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