Bicycle falls apart while bicycling

[vsector]

Hello!

My bicycle broke.

I mean that as in when I pedal the chain falls apart. It just happened on a routine bicycling trip when suddenly bang! Something went flying off the gears or something.

I know something is missing but I can't figure out what.

Thanks for any help you guys can provide.

Attached is a pic of the place I think is trouble.

[nfmisso]

Looks like the upper pulley of the rear derailleur is gone.

Cheapest: replace the rear derailleur; you will need a chain tool to break the chain, and put it back together, unless your chain has a master link.

This derailleur will work fine. http://www.amazon.com/Shimano-Tourney-TX55-Speed-Derailleur/dp/B003ZM9RDQ/

[Joe_W]

Actually you don't even need the chain tool. You can open the dérailleur at the pulleys. Take care to remember which one is going where.

[vsector]

You guys are awesome.

I'll get on this right away.

With spring weather already here, I'm missing out on a lot of bicycling!

Thanks!

[Painkiller]

just loosen the top pulley and remove the lower.Then swing the inner cage open and put the lower pulley back in while pushing the chain in with it