Colnago C50 bent gear hanger AND dropout
cyclingvet
Posts: 131
Had a major fall 10 days ago and apart from some very severe road rash, sprained right wrist and wrenched ands skinless on top left thumb, managed to ruin most of my Chorus groupset. I managed to ride back home but it was obvious the gear hanger was bent as the rear mech was snagging on the spokes on the largest sprocket.
I ordered a new rear mech , crankset and levers and gear hanger the next day but it won't arrive for a few more days yet.
Having recovered enough from my injuries to make a start on rebuilding the bike I have had a close look at the gear hanger, taken it off and it looks as if the rear dropout is also bent inwards. (quite a large percentage of the hanger is actually screwed against the rear dropout so when great force is applied to it it could also bend the dropout - this is different to an Enigma Esprit I have which also suffered a bent hanger 3 years ago but totally different design so no damage to dropout)
The hanger/dropout is bent so that at the bottom it must be 1.5-2mm out
Here's a couple of photos
http://www.flickr.com/photos/51158802@N05/5812897268/
http://www.flickr.com/photos/51158802@N05/5812897432/
My question is how easy is it to bend the rear dropout back into shape? Once the new hanger comes it will obviously not fit flush with the bent dropout. Should my LBS be able to do this job without wrecking the frame?
I ordered a new rear mech , crankset and levers and gear hanger the next day but it won't arrive for a few more days yet.
Having recovered enough from my injuries to make a start on rebuilding the bike I have had a close look at the gear hanger, taken it off and it looks as if the rear dropout is also bent inwards. (quite a large percentage of the hanger is actually screwed against the rear dropout so when great force is applied to it it could also bend the dropout - this is different to an Enigma Esprit I have which also suffered a bent hanger 3 years ago but totally different design so no damage to dropout)
The hanger/dropout is bent so that at the bottom it must be 1.5-2mm out
Here's a couple of photos
http://www.flickr.com/photos/51158802@N05/5812897268/
http://www.flickr.com/photos/51158802@N05/5812897432/
My question is how easy is it to bend the rear dropout back into shape? Once the new hanger comes it will obviously not fit flush with the bent dropout. Should my LBS be able to do this job without wrecking the frame?
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Comments
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using the right tool (park DAG II) and, most importantly, with the rear wheel in nice and tight to "brace" the rear triangle, you or an LBS should be able to bend your current mech hanger straight and/or compensate for any slight bend in the dropout or very slightly bend it back into shape but, be very careful as carbon stays or carbon/dropout join are not going to bend!Colnago Addict!0
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+1^^^- Use existing hanger to 'manipulate' the dropout.
May be worth putting in a spare rear hub in place of the wheel so that you can see around the problem- if you have one, and add a washer behind the outside of the QR to try to isolate the bending moment lower down the dropout.0 -
BTW OT, Love some of your photo's in your Flickr account 8)0
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Thanks for the advice. Will take to LBS as don't have park tool and tell them of your suggestions rubbernecker.
Glad you like the photos Velonutter0
