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Solution for a chain guard

Old 12-15-11, 10:39 PM
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Telly
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Solution for a chain guard

Hello everyone,

My trekking bike came with a plastic chain guard which covered the crank-set and most of the top portion of the chain, and after daily commuting has broken. Since 90% of my commutes are done in dry weather over pavement, I would prefer to install a plastic ring on my crank-set as to protect my everyday clothing from the chain itself.

This is where I need some advice... so far after looking around online, I've only found bash-rings, made for bmx/mtb which cost $50 or more. I know my crank-set (FSA/RPM AL-8 42t) can accept some form of chain-guard because of the mounting holes on the circumference and would appreciate any ideas on finding one.

Here's a picture of the FSA/RPM AL-8 crank-set

Last edited by Telly; 12-15-11 at 10:45 PM.
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Old 12-15-11, 10:55 PM
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I cut one from an oil drain pan, $2 Walmart.

Stiff enough to work, flexiable enough to give a little when
needed.







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Old 12-15-11, 11:31 PM
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for $50, there's the option of just buying a crankset that has it already.

some plastic jar lid should do.
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Old 12-15-11, 11:45 PM
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That's a great idea... maybe I can fabricate one from some thin plexiglass, preferably smoked/clear since my crankset is polish aluminum.

@AEO, I was about to change my crankset and there's a pretty descent sized post concerning how to change gears which I started, but everything's on hold since I have a colleague who's very interested in buying my bike and might sell it as it so I can get something better (not that I'm not please with what I have now).
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Old 12-16-11, 06:46 AM
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Telly: I like the Kool-Stop Chain Disc. It's made from pretty tough smoked plastic. About 10 minutes with WD-40 and a thumbnail will get rid of the dopey logo that's silk-screened on. I have one on my MTB and my hybrid. It should go fine with your crankset. Just be sure to get the right size for the number of teeth on your big chain ring.
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Old 12-16-11, 09:52 AM
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Unfortunately I can't find the Kool-Stop here in Greece...
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Old 12-16-11, 10:09 AM
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Originally Posted by Telly View Post
Unfortunately I can't find the Kool-Stop here in Greece...
How about a Walmart???
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Old 12-16-11, 10:48 AM
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Originally Posted by Telly View Post
That's a great idea... maybe I can fabricate one from some thin plexiglass, preferably smoked/clear since my crankset is polish aluminum.

@AEO, I was about to change my crankset and there's a pretty descent sized post concerning how to change gears which I started, but everything's on hold since I have a colleague who's very interested in buying my bike and might sell it as it so I can get something better (not that I'm not please with what I have now).
You may find that plexi is too brittle, diffcult to drill without cracking, and will not take stress of screws.
Polycarbonate(Lexan) would be a better choice, but without the proper drills and technique it may still split or crack.
If you haunt eb-y long enough you may find an FSA chainguard at a reasonable price.
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Old 12-16-11, 11:29 AM
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Unfortunately I can't find the Kool-Stop here in Greece...
parcels move around the world..

FWIW, +1 Plexiglass, an acrylic, cracks, won't be as durable as LDPE,
or Polycarbonate .
you should make it Quite Bashguard thick..

Of course there is Carbon fiber sheet stock available too..

Last edited by fietsbob; 12-16-11 at 11:33 AM.
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Old 12-16-11, 11:45 AM
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Originally Posted by Telly View Post
Unfortunately I can't find the Kool-Stop here in Greece...
That guard is Dutch, actually. Kool-stop just lends the name for the US market. I don't have the name of the Dutch company though at hand...
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Old 12-16-11, 02:27 PM
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Thanks for all the advice.. unfortunately Walmart doesn't exist in Greece and form what I know, doesn't ship outside the US either...

By sheer luck, I just found out that I'll probably be in the Netherlands for Xmas, in which case I can check and see for the part...

@2_i if you could remember the brand that'd be great!
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Old 12-16-11, 03:57 PM
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Telly: Maybe a call/email to Kool-Stop would yield the Dutch brand name.
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Old 12-16-11, 04:12 PM
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Well, that turned out to be more complicated than anticipated but then maybe characteristic for the going-ons within the bike industry. The original manufacturer appears to be De Woerd B.V. They apparently have a patent for that disc. They have been taken over by Stenman Holland B.V. All signs further indicate that the latter company has been taken over by the Axa of the Axa-Basta provenience. Given the market presence, the guard seems still to be marketed as due to De Woerd. However, on account of all of these acquisitions it appears hard find a manufacturer's site showing that guard. Incidentally, other manufacturer's offer such guards of their own, e.g. German Hebie, but none provides such a good protection as the one from De Woerd.
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Old 12-16-11, 11:49 PM
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Thanks everyone for the help! I'll call these companies up on Monday morning and from the looks of things will probably be in the southern Netherlands next week, a stones throw away from France and Luxembourg.
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