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  1. #1
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    Apr 2006
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    Modify a Kettler Trikett

    Hello,

    I'm a newbie and very happy to have stumbled across this trove of information. I just bought my son a Kettler Trikett tricycle (he's 2). It's a nice unit, and I'm happy with the purchase -- and more to the point, he's happy. The reason I bought it is because rather than have the crank drive the front wheels directly like most trikes do, this vehicle has the pedals driving a sprocket and chain that goes to a sprocket on the rear axle, much like a conventional bike.

    But I'm disappointed in one aspect of the trike. I was hoping that it would function like a bike with a coaster brake -- he could pedal, coast, or brake at his option. But it doesn't -- the gear is fixed on the rear axle. Well, this isn't exactly true -- there's a lever that engages or disengages that sprocket, but you'd have to do this every time you want to coast. Not cool.

    So I'm hoping to pick the brain of someone with more brain to pick than I. Would it be possible to modify this bike to approach the functionality of a traditional bike with a coaster brake? I'm certain I can find a rear hub from a child's bike. The rear axle is just a long steel rod. I think my problem will be that in this bike, the sprocket drives the axle and the axle drives the wheel -- whereas in a regular bike, the sprocket drives the hub and the hub drives the wheel, and the axle is always free. Can someone help me brainstorm this problem?

  2. #2
    Senior Member demoncyclist's Avatar
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    That lever isn't for coasting, but for times when you have a tired kid who needs to be pushed home (I think there is a handle attachment for parents) while out on a longer jaunt. Little kids bikes generally don't freewheel so as to keep some control of speed if they should hit an incline above their ability to control the bike (again that is where the handle for mom and dad comes in).
    DEMON

    Satanic Mechanic
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    2011 Lynskey Sportive (Shimano Ultegra 10s)
    1988 Cannondale SM400 (Suntour XC-M 7s)

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