Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 11-23-12, 09:16 PM   #1
garynchait
Newbie
Thread Starter
 
Join Date: Nov 2012
Bikes:
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Trek aluminum bike seat tube corrosion concern

I just bought an 80s aluminum framed Trek used for my son. Got it home and noticed corrosion on the seat tube near the front derailleur. Attached some images.
So, is it dangerous to ride the bike with this corrosion present, i.e. could the seat tube crack now or sometime in the future?
Thanks.
-Gary
Attached Images
File Type: jpg treak bike 2.jpg (72.7 KB, 12 views)
File Type: jpg trek bike 1.jpg (74.5 KB, 11 views)
File Type: jpg trek downtube 1.jpg (36.2 KB, 18 views)
File Type: jpg trek downtube 2.jpg (40.3 KB, 12 views)

Last edited by garynchait; 11-23-12 at 09:16 PM. Reason: error
garynchait is offline   Reply With Quote
Old 11-23-12, 09:45 PM   #2
FBinNY 
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Posts: 29,404
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 79 Post(s)
Yes, it is corroded, probably from being stored outdoors, or in a very damp basement. And, Yes it might crack one day, but that could be years away.

In any case, it isn't dangerous because a seat tube failure there isn't likely to cause a crash. It's most likely to crack when climbing a steep hill with lots of pedal pressure, in other words at very low speed. I'd have no problem riding this as an around town bike, or on longer rides if I had access to alternate transport in the event it cracked.

Having cracked a frame in a similar place 100 miles from home and having to do a field repair (which lasted 2 more years) I can assure you that the worst that will come of riding this is inconvenience.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 02:00 PM.