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helicomatic(6 posts)

Sep 22, 2002 9:31 AM
I have a Batavus bike and am missing the retaining ring for the cassette. I've had no luck finding it so I'm open for suggestions on how to modify it so that it will stay on. I'm new to the cycling sport so(1500 miles) I will welcome any and all help. If this cassette cannot be modified safely, How do I go about determining what system to convert it to?
New back wheel.Spoke Wrench
Sep 22, 2002 10:58 AM
I'd buy a new back wheel with a Shimano hub.
New back wheel.jw63
Sep 22, 2002 12:24 PM
Ok, Sounds good. But depending on which hub I buy, am I going to have a conflict with the front derailer,chain size, or the crank? I know(at the present) just enough about this to buy components I don't need and need components I didn't buy. Please excuse my ignorance.
You need to find a local bike mechanic.Spoke Wrench
Sep 22, 2002 1:26 PM
You're right. Everything on a bike is connected to everything else. My general rule of thumb is "You can never replace just one part on a bicycle."

You really need to find a good local bike guy to help you through this process. I'm guessing that your bike has 126mm rear dropout spacing, a 6 speed cassette and friction shifters. You are probably going to have difficulty finding a stock wheel that will match the rest of your bike. You are probably going to need a bike machanic who can modify a stock wheel to work.
HeliomaticRusty Coggs
Sep 22, 2002 2:35 PM
It's a freewheel with a unique spiral type 'thread'.
Are you the same guy I promised to send a ring to?Silverback
Sep 23, 2002 7:58 AM
My beater started life as a Helico-equipped Trek. When it became impossible to find parts or replacement freewheel bodies, I swapped wheels to an old Shimano I had around, and I have a couple of rings plus the tool to remove them out in the garage somewhere. Couple of months ago I promised to send them to somebody, but between the time I got his note and the time I found the parts, I lost his address. So...
FWIW, I looked HARD in all the conventional and some unconventional places for parts for that thing before I swapped, and apparently there are none left anywhere.
The ring will fix you up temporarily, but that freewheel had some issues and eventually will die (I ripped the pawls out of a couple of them). If you can find an appropriate Shimano (126mm spacing??), I think I'd just switch over.