Daughter's chain fell off

[Biciclista]

my chain falls off sometimes too. I just have to put it back on. You can do it, it's not too hard.

[DebW]

If this was a single-speed bike like a coaster brake or an internal-geared bike (3-speed, 7-speed) with only one sprocket front and back and no derailleur, then the chain tension is wrong and should be fixed.

[tulip]

jyyanks, Deb is a bike mechanic. She knows what she's talking about. So do the rest of the group, but Deb has actual credentials. Or at least more credentials.

[jyyanks]

Thanks All! The bike is a single speed Dahon Boardwalk folding bike with coaster brakes and hand brakes. We got it in June and I had in tuned in the beginning of August. I am not sure if it has a derailleur but I'll take a look today. Maybe I should take it back to the LBS where I had it tuned. We plan on riding 12 miles again over the weekend and I don't want her chain to fall off while she is riding...

[OakLeaf]

If it's a single-speed, then by definition it doesn't have a derailleur. A derailleur moves the chain from one cog to another on multi-speed bikes.

+1 - listen to Deb. The owner's manual probably has instructions on adjusting chain tension, but if you don't have the manual and it isn't immediately obvious how to do it, then take it to the LBS.