Folding Bikes - Question about chain falling off

Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.



PDA

View Full Version : Question about chain falling off

invisiblehand
03-11-07, 08:45 PM
Is there a little "thingy" that can keep the chain from falling off the inner chainring when folding a Bike Friday?

My apologies for starting a new thread. I recall someone addressing this in the past; but I cannot find that old thread.

spambait11
03-11-07, 09:41 PM
No personal experience but I think you're referring to something like this (scroll to the very bottom):
Third Eye chain watcher (http://www.gaerlan.com/bikeparts/parts/crank/crank.html)
DaFriMon
03-11-07, 09:56 PM
The picture at the bottom of this page (http://www.bikefriday.com/node/830) shows Bike Friday's own chain retainer. I think it's intended more for single chainring models, but can be used on doubles or triples. When you fold the bike, the angled bit of metal catches the chain and takes up the slack so it won't fall off. You'd have to call BF and ask about ordering it; it isn't in their catalog. I have one on my single chainring Pocket Tourist, where it works fine. Had one on my double chainring Crusoe, took it off at one point, and haven't bothered to re-install it.

Fear&Trembling
03-12-07, 03:16 AM
I used an N-Gear Jump Stop on my Birdy.
invisiblehand
03-12-07, 07:56 AM
Hey, thanks guys.

I did not realize that the N-Gear Jump Stop came in a size appropriate for a Birdy. Isn't the seat tube 40mm?