Freehub (bottom bracket)
#1
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Freehub (bottom bracket)
hey, a friend gave me a couple old bikes to fix up and sell. no fixing required, but i noticed something a little odd (i think). there's an older bike, and it doesnt have a freehub, instead, i guess what you could call a free bottom bracket? when you coast the chain keeps going around, the chainrings keep moving too (obviously), but the crank arms go where you want them. just wondering how rare this is. if you dont understand i can post a video before they get sold, just ask. thanks
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front freewheeling cranks were common in late 70's early 80's. Neat that you have one.
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hey, a friend gave me a couple old bikes to fix up and sell. no fixing required, but i noticed something a little odd (i think). there's an older bike, and it doesnt have a freehub, instead, i guess what you could call a free bottom bracket? when you coast the chain keeps going around, the chainrings keep moving too (obviously), but the crank arms go where you want them. just wondering how rare this is. if you dont understand i can post a video before they get sold, just ask. thanks
Sheldon "An Idea Whose Time Never Came" Brown
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I had a schwinn caliente that had that. The thing weighed as much as my tandem.
Sheldon
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ya, this bike seems to be of that era. and its shimano, so i guess it must be their FFS. this doesnt increase the bikes value does it?
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Please do not construe this as an endorsement or recommendation. It most emphatically is not.
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These things had an unfortunate side effect for bike mechanics. The chain moved as long as the rear wheel was turning, even if the crank was stationary, and could trap unsuspecting fingers.
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I have this in my Nishiki and I want to remove it. Any ideas on how to accomplish this?
Melinda
Melinda
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To remove the old bottom bracket cups, you use an old-style Shimano "Boss" freewheel puller.
See: https://sheldonbrown.com/tools/freewheel.html
All the best,
Sheldon
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Bad linkus
If its a three-piece crank, you will need a whole new crank and bottom bracket.
To remove the old bottom bracket cups, you use an old-style Shimano "Boss" freewheel puller.
See: https://sheldonbrown.com/tools/freewheel.html
To remove the old bottom bracket cups, you use an old-style Shimano "Boss" freewheel puller.
See: https://sheldonbrown.com/tools/freewheel.html
https://www.sheldonbrown.com/harris/tools/freewheel.html
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BTW, Sheldon, you used one of my favorite quotes in the thing about the FFS "Its a solution in search of a problem"!
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That sounds like it could be dangerous! When my brother was 5 he cut the tip of his finger off in a "fixed gear" Schwinn excercise bike while spinning the pedals with his hands. Of course me (age 7) helped him do it and he got $85,000 and I got nothing
BTW, Sheldon, you used one of my favorite quotes in the thing about the FFS "Its a solution in search of a problem"!
BTW, Sheldon, you used one of my favorite quotes in the thing about the FFS "Its a solution in search of a problem"!
#14
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Isn't this similar to what trials-specific bikes ie. Monty use/used?
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If its a three-piece crank, you will need a whole new crank and bottom bracket.
To remove the old bottom bracket cups, you use an old-style Shimano "Boss" freewheel puller.
See: https://sheldonbrown.com/tools/freewheel.html
All the best,
Sheldon
To remove the old bottom bracket cups, you use an old-style Shimano "Boss" freewheel puller.
See: https://sheldonbrown.com/tools/freewheel.html
All the best,
Sheldon