Bicycle Mechanics - Dent below derailer Hanger

Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.




View Full Version : Dent below derailer Hanger


pcsanity1
07-21-03, 08:09 PM
My wife recently bought a new Trek 2000 WSD (2003 year model) and I was looking at the chain ring when the bike was not shifting correctly.

I noticed that there is a dent in the tube just below the derailer hanger (Clamp on) It looks like it may have been designed to be there, but I am not sure.

It does not look like the derailer is hitting it because the paint is so well in tact. Even then, could a derailer snapping into the bottom chain ring actually dent the frame?

I guess this long winded ramble is to ask if this "dent" is normal. My Specialized does not have it, so I have nothing to compare to.

I will be taking her bike in tomorrow to get adjusted, but wanted to know if the frame should have that indention there.

I assume this is something that should be fixed under warranty if it is not right? The bike is only about 8 days old. She has not been off the trainer with it, and there is no way that point could have been hit anyways.


Thanks,

Matt
:confused:


roadfix
07-21-03, 08:26 PM
This 'dent' is on the seat tube, right below the front derailleur clamp? If that's so, there's no reason for it to be there. Now, you're not talking about the large dimple on the chainstay, I assume...

pcsanity1
07-21-03, 08:50 PM
Yep, thats where it is, on the seat tube....

Will Trek likely tak care of this under warranty since it is so new?
(Picked it up last Monday....never been off the trainer)

Seems like this would affect the integrity of the frame...its not a dimple, more of a dent. Maybe like the derailer got mashed into it in transit. (Unless a misadjusted derailer can have enough force to dent the frame.)

What would you do if they offered you a % off for the dent, what would be fair. (Assuming it would not affect the integrity of the frame)

I am a bit irked with the shop, I checked everything on delivery, wheels, handlebars, etc. Never thought to look behind the derailer. Only reason I noticed it was because the derailer adjustment went out (for the second time in 4 days) and I saw the dent.


Thanks,

Matt


Rev.Chuck
07-21-03, 09:37 PM
Several bike makers put an indent below the front der to allow freeshifting to the smallest ring on bikes with triples.

Chi
07-21-03, 10:30 PM
Easiest way to find out: go look at another 1000 and see if it has one.