Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take Part in the October Giveaway to Win the Qiolor TIGER Retro Electric Bike


What do I do with my bent 4300 frame ?
#1
Hi everyone,

Recently some bloke rammed into my 4300 frame and now the rear left frame is bent inwards by around 20 deg. Also, the gear shifting mechanism has sheared off at its mounting point on the frame. What can I do about the frame and the gear mech ? Please pardon my ignorance about the correct names of these assemblies. I am new to this world and still learning. Thanks in advance.
  Reply
#2
4300 what?

Brand? Frame material? Pictures!!! And where are you located.

If your frame is aluminum - scrap it. If it is Cr-Mo steel or titanium; it is repairable.

Carbon fiber is repairable IF you can find someone with the correct skills, but the repair would likely be more money than a new bike.
Nigel
  Reply
#3
4300 is a Trek, aluminium frame - I think. :S

Do you mean the dropout is bent?

This is a dropout:

[Image: arcolederailleurhanger.jpg]

The part where the wheels fit in the frame. Most modern aluminium and carbon frames have a replaceable mech hanger, like the one shown in the picture above. It's designed to be "sacrificial", so that it bends or breaks before your mech or frame is badly damaged.

Have a good look at your frame/dropout/mech hanger. If it's just the mech hanger that's bent or broken, you should be able to replace it. If you're not sure, it might be worth taking it to a bike shop for them to check it out. You can't straighten aluminum frames and once they're bent they are weakened and may be dangerous to ride.
  Reply
#4
(08-17-2012, 12:04 PM)nfmisso Wrote:  4300 what?

Brand? Frame material? Pictures!!! And where are you located.

If your frame is aluminum - scrap it. If it is Cr-Mo steel or titanium; it is repairable.

Carbon fiber is repairable IF you can find someone with the correct skills, but the repair would likely be more money than a new bike.

Right, my fault. Forgot to mention that its a Trek bike with Aluminum frame. I am in India and these bikes are imported. Am not sure that any repairs are even possible here. Guess will just have to scrap it. Would I be able to use all the other items onto a new frame ? Will try to post pics too.
(08-17-2012, 12:49 PM)xerxes Wrote:  4300 is a Trek, aluminium frame - I think. :S

Do you mean the dropout is bent?

This is a dropout:

[Image: arcolederailleurhanger.jpg]

The part where the wheels fit in the frame. Most modern aluminium and carbon frames have a replaceable mech hanger, like the one shown in the picture above. It's designed to be "sacrificial", so that it bends or breaks before your mech or frame is badly damaged.

Have a good look at your frame/dropout/mech hanger. If it's just the mech hanger that's bent or broken, you should be able to replace it. If you're not sure, it might be worth taking it to a bike shop for them to check it out. You can't straighten aluminum frames and once they're bent they are weakened and may be dangerous to ride.

You got it. Thats the one, the 'DROPOUT'. Its snapped clean. Glad that it can be replaced. Thanks.
  Reply
#5
Hi deep;

Yes, you can salvage all the components from the bike and use them on another frame.

In the USA, people often purchase a frame from Nashbar. http://www.nashbar.com/bikes/SubCategory_10053_10052_202337_-1_202326_202326
Nigel
  Reply
#6
Thanks Nigel,

Your advice is very useful.
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
3,344
06-02-2020, 07:16 PM
Last Post: Painkiller
 
3,830
06-23-2019, 01:51 PM
Last Post: MamboNumber5
 
29,352
09-24-2014, 01:25 PM
Last Post: cny-man
 
17,137
12-03-2013, 07:48 PM
Last Post: GeorgeET
 
18,147
11-04-2013, 09:02 PM
Last Post: billy247
 
54,342
04-28-2013, 11:24 AM
Last Post: nfmisso
 
7,843
03-24-2013, 12:45 PM
Last Post: dweenk
 
8,012
04-30-2012, 09:26 PM
Last Post: bobtravers
 
34,966
04-03-2012, 09:20 PM
Last Post: bobtravers

Forum Jump:

[-]
10 Latest Posts
BAGGI 1936(?)
Today 10:24 AM
Do you have a four foot rule?
Today 10:10 AM
Trek domane tyre
Yesterday 05:07 PM
Greetings!
Yesterday 04:39 PM
Peugeot Nouveau Folder
Yesterday 04:34 PM
Great UK Cycle Camping Map, For E-Bikes,...
Yesterday 12:04 PM
Community Discussion Cycling Myths
11-07-2024 09:05 PM
Cycling is Anti-Aging, But There's a Cat...
11-07-2024 06:51 PM
Tasmania! Anyone ridden here?
11-07-2024 05:15 PM
Do you plan or random ride your MTB ride...
11-07-2024 05:09 PM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. enkei
20 posts
no avatar 2. GirishH
18 posts
no avatar 3. Jesper
18 posts
no avatar 4. Flowrider
14 posts
no avatar 5. Talha
10 posts