Rear derailleur snapped off...

Moominman2

So I forgot to close my saddle bag and an innertube manages to pull my rear derailleur off.

It's a shimano 105. Is it as simple as buying another shimano 105 to replace it? Or are there different types? I'll probably buy second hand off eBay.

Novice question !

Thanks
Luke

simonj

Has it bent/snapped the rear hanger or the actual derailleur? I've seen the hanger break before (by design) as it's only £10 to replace then as your derailleur stand a good chance of being intact.

simonj

This bit :-

Moominman2

Thanks for the response.

It's the actual derailleur. The hanger looks ok.

simonj

Blimey, I'm surprised you did not damage the hanger as they are normally made to be the weakest bit so that they go first. Just buy a new hanger, make sure same speed obviously and cage is same length so you don;t need to change chain. I'd check the hanger again, mine looked ok, but was actually slightly bent which made indexing trickier.

Moominman2

Probably a good idea! I'll take it off later and have a look. Stupid mistake...was so gutted !

Would you trust one used of eBay for a tenner? And how difficult is it to set up without going to a lbs?

Thanks for your help
Luke

ic.

A 105 rear mech is about £28 brand new, I'd go with that.

It's a very simple job to screw on and then attach cables, run the chain through and index the gears, but there are plenty of videos on youtube too.

Matthewfalle

Go for new that way you know it's not jazzed, which is why most things end up on the Bay........

Don't forget to set fire to the old one.

Moominman2

Thanks everyone for your help.

I'll go buy one now !