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Folding Bikes Discuss the unique features and issues of folding bikes. Also a great place to learn what folding bike will work best for your needs.

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Old 03-06-06, 09:38 PM   #1
xylx
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BF Metro Chain issues

I have a recently purchased (slightly used) BF Metro. Me and this bike don't get along. The more obvious problem is that the chain keeps falling off the chainring every time I get up any speed. I've encountered this problem with a commuter I had set up with just a single chain ring up front. In that case I cured it by putting a chain ring guard so the chain couldn't pop off. I have never seen a guard for a chainring that big as is on the BF. Nor is there anywhere to attach it on this chainring. I'm beginning to regret not having bought a Dahon Vitesse. Any suggestions other than converting the rear hub to an internal 7 spd. Nexus or making my kid drop out of college so I can afford to buy a Rohloff?
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Old 03-06-06, 10:22 PM   #2
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have you tryed to tune the drive train? I would suggest you to take your bicycle to an experienced mechanic to take a look at the bicycle, just in case to see if everything is in place and strait. About the nexus 7, I would suggest you to get a nexus 8 if you are not climbing the Everest and for the time being let your "kid finish his College". If you are not satisfied with the gear range, instal a double chain ring and a chain tensioner.
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Old 03-06-06, 10:44 PM   #3
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I would take your bike to a local bike shop for service. The Chain could be too long, the Front crank could be slightly bend and the rear derailer could be bend.
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Old 03-06-06, 11:18 PM   #4
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Ditto what everyone else says. In addition, if you are experiencing chain drop on shifts, this is a common problem with small wheel bikes. It can be cured with a chainguide (you can get it from Gaerlan Cycles online) or by mounting a front derailler to keep it in place.
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Old 03-07-06, 12:22 PM   #5
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Another way of avoiding that pesky chaindrop problem is to go the route you originally intended to-install a internal hub gear system. I done this with my Dahon Boardwalk and in the over 2 years that I had the bike, I never had one chaindrop to the bike's credit. I used the traditional Sturmey-Archer AW three speed one.
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Old 03-07-06, 04:12 PM   #6
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Quote:
Originally Posted by folder fanatic
Another way of avoiding that pesky chaindrop problem is to go the route you originally intended to-install a internal hub gear system.
OP can't do this on a Bike Friday as a tight chain tension will impede folding.
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Old 03-07-06, 04:47 PM   #7
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First check the chain out.Next contact Bike friday regarding this problem. If they will not help you( They will try to more likely than not)Check with Gaerlan custom bicycles .They fabricate chain retention devices for dahons.
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Old 03-07-06, 07:58 PM   #8
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Quote:
Originally Posted by spambait11
OP can't do this on a Bike Friday as a tight chain tension will impede folding.
It's not common, but I've heard of 7 speed internal hub gear BFs. The solution is to use something like a Surley Singleator to adjust the chain tension. Greengear built a Nexus 7 Pocket Lama for Heinz Stücke like this. Mind you, I'm not recommending it, just saying it's theoretically possible.
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Old 03-07-06, 08:39 PM   #9
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I'm actually a fairly competent bike mechanic. I have a whole shop in my shed in Idaho including welders. But I'm in DC. The chain is not too long. In first gear the derailluer is properly stretched. Might be a bent ring, but doesn't look like it. I've never had a bike in my life I took an instant dislike to. Maybe I'll get one of those Mtn bike chain guides they use on downhill bikes. I'm convinced though that any bike with a single ring up front should have ring guards. See e.g. REI's cool Buzz urban assault bike. Next time I go back to Idaho I'll bring my beater out. Anyone want a BF metro cheap?
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Old 03-08-06, 12:20 PM   #10
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I was just wondering why would the original owner sold a bike that is supposely custom made for him/her after going through the long process of fitting and weeks of waiting for a made-to-order bike? Then face suffering through a bike that needs more maintanence than a beater. I guess the used bicycle market is not like it was just 10 years ago when I bought my last old one. It has become more "buyer beware" exhibiting extreme caution about the bike's origins (is it stolen?) the hidden problems of the bike itself no matter the label, and way overly inflated prices ($1000s for a just old-not refering to real antique bikes on Ebay and Craigslist). I now only purchase new bikes. All my questions and adjustments of the bike has been answered or will be taken care of by my LBS.

Last edited by folder fanatic; 03-08-06 at 12:27 PM.
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Old 03-09-06, 10:58 AM   #11
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You never know why someone sell a custom made bike but, not all used bikes are lemons. First of all not every bike, Bike Friday sells are custom fit, they do come in S, M & L sizing like the pocket tourist & Family tandem. And not all of them are $1000+ I believe the Metro is a 5-6 year old bike FB no longer produces. It was around $600-700 new? I do agree that usually you are buying someone else’s headache but if the price is right why not? Zylx, how much do you want for the BF Metro?
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