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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 12-06-11, 12:18 AM   #1
ontopcop
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Batavus Intercycle folding bike

Batavus Intecycle folding bike.
I aquired a free Batavus Intercycle folding bike. White in color, chrome fenders and has a luggage rack and chain guard. I replaced the tubes and tires ($50.00). Chain is kinked up in the chain guard and the right side crank seems bent. It does have the cranks that are held in place with the wedge screws. I want to ride this bike so am looking to get it road worthy. Before the chain got kinked it rode nice. Questions I have are following;

How does the chain guard come off. I tried!

Am i able to replce the cranks, gears etc to something more modern? Any advice would be appreciated.
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Old 12-06-11, 02:24 AM   #2
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While cottered cranks do have their drawbacks, there's little-to-no actual benefits from replacing them as long as they're still OK.
And bent cranks do happen, but IME bent pedals are more common. They'll both feel the same while riding, so figuring out which is which usually requires a good eye. And as you thought it "rode nice" before, replacing that isn't an immediate concern.
A crank upgrade/update can be quite a challenge for the unwary, you need to figure out exactly what type of bottom bracket the bike uses. There are a several versions to choose from.
For gears what makes most sense is an internally geared rear hub. I'd look for a complete wheel, either buying if done, or having one built for me. Changing from old 3-speed to new 3-speed is rather pointless, unless the old is broken. Changing to a newer 5-speed or more may make more sense. Going higher, you might find the build awkward due to the relatively small wheel size and the size of the hub.

Chain guard - can't help w/o pics. There's usually one screw by the chainstay, one by the seat tube, and one, on a bracket extending down from the Bottom bracket shell.
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Old 12-06-11, 04:29 PM   #3
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I wasnt able to post pics at the time I was needing this information, that would be why I gave the exact name and model of the bike. I decided to take the bike first thing this a.m. to my LBS. I asked for a tune up and explained to them the problem regarding the chain guard. The bottom bracket did have to be removed to take off the chain guard. The tune up took care of all problems. Come to find out, the bike has a Torpedo Duomatic rear hub. And as far as changing out cranks, forks, chain ring etc. in the future, Im good to go, there is compatible items.
Thanks for the reply.
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Old 12-06-11, 08:14 PM   #4
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