Screwing in rear mech drop out

[ttcycle]

The rear mech drop out got damaged on my bike- got a replacement and have tried screwing it in with the two supplied screws - however, it doesn't seem to be sitting in and the screws aren't keeping it into place for me to fit the rear mech/derailleur to it. The size of the dropout is the same.

Any tips?

 

[lukesdad]

Is the frame damaged ?

 

[Steve Austin]

Have you bought the correct replacement drop-out? Sounds obvious, but i've bought one before that was the wrong size, shape etc

 

[ttcycle]

frame's been checked over and it's fine - the drop out is the identical one sent to me from the same frame stockists - compared it yesterday and it's same shape and size...I'm stumped on why it is sitting right!

 

[lukesdad]

are the screws identical are they countersunk ?

 

[ttcycle]

What do you mean by countersunk - that's a new term for me!

 

[lukesdad]

most hangers take counter sunk screws as opposed to panheads so they sit flush and locate properly into the hanger they are tapered on the undreside of the head.

 

[ttcycle]

Yep -they look like countersunk screws - they're quite short on the threads though - technically they must have fit as I don't know how the dropout would have held the rear mech otherwise.

 

[lukesdad]

might be an idea to post some pics.

 

[ttcycle]

ok will do!

 

[lukesdad]

Have you tried the old screws?

 

[ttcycle]

Here are the pics

 

[ttcycle]

I didn't get any screws with the new dropout - first pic= frame, 2nd pic= old broken dropout, 3 rd pic= replacement with old screws screwed in and last pic is depth of screws in dropout

 

[lukesdad]

On the last pic. the heads arnt flush with the dropout have you just left them like that or as that as far in as they will sit.

 

[ttcycle]

As far as they'll go