changing sprocket on kid's coaster brake bike
04-30-10, 11:01 AM
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changing sprocket on kid's coaster brake bike
Hi,
I want to change the sprocket on my son's bike. It looks to me that the sprocket is held on by some type of clip. I have a Park HCW5 tool that can remove fixed gear lockrings, but it is way to big for the notched clip or ring that holds the sprocket on the kids wheel.
Tech support from Trek described the sprocket as "That cog should be replaceable. It is the same style you have seen on bikes for years. A sprocket with 3 lobed interface held on with a c-clip."
Any ideas on what tool can be used?
Secondly, how should the bearing/clutch assembly be adjusted on the rear wheel? When I removed the rear wheel I was surprised that the wheel didn't spin smoothly. I must admit that I'm pretty much in the dark on how the wheel assembly works. Anyways, there is a nut that can be adjusted and I'm not sure if it is supposed to be tightened all the way in snugly, or if it is adjusted back for some other type of fit.
sprocket..jpg
Thanks
I want to change the sprocket on my son's bike. It looks to me that the sprocket is held on by some type of clip. I have a Park HCW5 tool that can remove fixed gear lockrings, but it is way to big for the notched clip or ring that holds the sprocket on the kids wheel.
Tech support from Trek described the sprocket as "That cog should be replaceable. It is the same style you have seen on bikes for years. A sprocket with 3 lobed interface held on with a c-clip."
Any ideas on what tool can be used?
Secondly, how should the bearing/clutch assembly be adjusted on the rear wheel? When I removed the rear wheel I was surprised that the wheel didn't spin smoothly. I must admit that I'm pretty much in the dark on how the wheel assembly works. Anyways, there is a nut that can be adjusted and I'm not sure if it is supposed to be tightened all the way in snugly, or if it is adjusted back for some other type of fit.
sprocket..jpg
Thanks
04-30-10, 01:35 PM
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04-30-10, 02:29 PM
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thanks, I missed that one on Park's site. I was looking on cassette and brakes, didn't think to check out hub - I don't know why.
05-01-10, 07:33 PM
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Does anyone know how smooth the wheel should rotate? The wheel doesn't really want to easily spin but I don't know what to really expect with cheaper kids parts and the whole clutch assembly. Perhaps the design and tolerance means there will be a reasonable amount of friction.
05-02-10, 09:45 AM
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Does anyone know how smooth the wheel should rotate? The wheel doesn't really want to easily spin but I don't know what to really expect with cheaper kids parts and the whole clutch assembly. Perhaps the design and tolerance means there will be a reasonable amount of friction.
05-02-10, 01:52 PM
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Either way the difference is very minor, noticeable on a free spinning wheel, but negligible in comparison to the loaded weight of bike and child.
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An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
