Coaster Brake to Fixed Gear
07-02-08, 08:51 AM
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Coaster Brake to Fixed Gear
Hello All,
I have a neighbor, whose 5 year old son is autistic. His son cannot figure out that he has to pedal. (he has training wheels and his dad pushes him around). On his tricycle, the pedals always rotate with the wheel, so he follows the pedals with his feet when he is pushed around. Since the bicycle cranks don't spin when coasting, he just puts his feet on the pedals and enjoys the ride...
My neighbor asked me to weld the sprocket to the hub, so that the cranks always turn...we can worry about stopping later, but he needs a way to get the boy to figure out he needs to pedal..
There has got to be an easier way....
I remember, back in my BMX days, we use to make freewheels out of the coaster brakes, by gutting the brake wedges in the hub, and replacing it with 2 washers and a spring....does anyone remember this....
I want to take this a step forward and try to lock the sprocket internally to the hub...
Any ideas?
Thanks,
Joel
San Antonio, Tx
I have a neighbor, whose 5 year old son is autistic. His son cannot figure out that he has to pedal. (he has training wheels and his dad pushes him around). On his tricycle, the pedals always rotate with the wheel, so he follows the pedals with his feet when he is pushed around. Since the bicycle cranks don't spin when coasting, he just puts his feet on the pedals and enjoys the ride...
My neighbor asked me to weld the sprocket to the hub, so that the cranks always turn...we can worry about stopping later, but he needs a way to get the boy to figure out he needs to pedal..
There has got to be an easier way....
I remember, back in my BMX days, we use to make freewheels out of the coaster brakes, by gutting the brake wedges in the hub, and replacing it with 2 washers and a spring....does anyone remember this....
I want to take this a step forward and try to lock the sprocket internally to the hub...
Any ideas?
Thanks,
Joel
San Antonio, Tx
08-06-18, 02:36 AM
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I did something like that for my autistic son and documented it as best i could here thetripots.com/2018/07/11/diy-bike-for-motorically-challenged-toddler/
08-06-18, 11:25 AM
#3
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A new rear wheel built for this purpose track(fixed) hubs rend to be 120mm wide
with their growth in popularity there is a broad price range ,
and even Used hubs from decades past , to seek out..
[kludge]
I'm thinking, a cheap steel freewheel hub could have a sprocket screwed on ,
and given the counter force is negligible,,
screwing on a couple adjustable cup lockrings and tightening them against each other,
will give plenty of unscrewing resistance, (no tack welding needed)
that real track hubs(used by adults) must add a left hand threaded lockring to resist, ..
....
with their growth in popularity there is a broad price range ,
and even Used hubs from decades past , to seek out..
[kludge]
I'm thinking, a cheap steel freewheel hub could have a sprocket screwed on ,
and given the counter force is negligible,,
screwing on a couple adjustable cup lockrings and tightening them against each other,
will give plenty of unscrewing resistance, (no tack welding needed)
that real track hubs(used by adults) must add a left hand threaded lockring to resist, ..
....
08-13-18, 02:39 AM
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A new rear wheel built for this purpose track(fixed) hubs rend to be 120mm wide
with their growth in popularity there is a broad price range ,
and even Used hubs from decades past , to seek out..
[kludge]
I'm thinking, a cheap steel freewheel hub could have a sprocket screwed on ,
and given the counter force is negligible,,
screwing on a couple adjustable cup lockrings and tightening them against each other,
will give plenty of unscrewing resistance, (no tack welding needed)
that real track hubs(used by adults) must add a left hand threaded lockring to resist, ..
....
with their growth in popularity there is a broad price range ,
and even Used hubs from decades past , to seek out..
[kludge]
I'm thinking, a cheap steel freewheel hub could have a sprocket screwed on ,
and given the counter force is negligible,,
screwing on a couple adjustable cup lockrings and tightening them against each other,
will give plenty of unscrewing resistance, (no tack welding needed)
that real track hubs(used by adults) must add a left hand threaded lockring to resist, ..
....
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