Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Severity of dent in frame?

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.

Severity of dent in frame?

Old 03-21-15, 08:10 PM
Junior Member
Thread Starter
Join Date: Mar 2015
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Severity of dent in frame?

I recently noticed a small dent in my chromoly frame. I have no idea where it came from, but don't have the knowledge to assess the damage or whether it compromises the integrity of the bike (or is there any hope to fix it?). I plan to take it in, but thought I might check in with knowledgeable folks here in the meantime! A few pics below
Attached Images
File Type: jpg
photo 3-1.jpg (97.4 KB, 97 views)
File Type: jpg
photo 1-1.jpg (99.0 KB, 78 views)
File Type: jpg
photo 2-1.jpg (97.8 KB, 77 views)
noho is offline  
Old 03-21-15, 08:17 PM
Senior Member
Binky's Avatar
Join Date: Mar 2013
Location: Southern Ontario, Canada
Posts: 826

Bikes: Too, too many....

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 114 Post(s)
Likes: 0
Liked 97 Times in 42 Posts
Although it might impact negatively on the value of the bike when you go to sell it, I do not think it will have any effect on the integrity of the tube. I have seen much worse, and speaking of worse, you can very likely not make it better - but you could make it worse.
If it were my bike I would not worry about it.

Binky is offline  
Old 03-21-15, 08:24 PM
Senior Member
bike_forever's Avatar
Join Date: Mar 2014
Location: Midwest USA
Posts: 116
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Install a water bottle cage and tall water bottle and you will forget it is ever there.
bike_forever is offline  
Old 03-21-15, 09:31 PM
Andrew R Stewart 
Senior Member
Andrew R Stewart's Avatar
Join Date: Feb 2012
Location: Rochester, NY
Posts: 16,268

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Raleigh Pro, Trek Cycle Cross, Mongoose tomac ATB, GT Bravado ATB, JCP Folder

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3425 Post(s)
Liked 2,124 Times in 1,388 Posts
Agreed with both replies. It's steel, the dent is not very deep or ragged and it's the seat tube's mid section. Only possible concern is the bottle boss near by. So ride the bike and keep an eye on it but after the miles add up you'll get more confidence. Andy.
Andrew R Stewart is offline  
Old 03-21-15, 11:20 PM
Tortoise Wins by a Hare!
AlmostTrick's Avatar
Join Date: Feb 2006
Location: Looney Tunes, IL
Posts: 7,397

Bikes: Wabi Special FG, Raleigh Roper, Nashbar AL-1, Miyata One Hundred, '70 Schwinn Lemonator and More!!

Mentioned: 21 Post(s)
Tagged: 0 Thread(s)
Quoted: 1546 Post(s)
Liked 926 Times in 499 Posts
Your steel bike is completely sound. It's not fragile like carbon.

If it were mine, I'd take it to one of the paintless car dent repair shops, and ask if they could work it out for me, purely for aesthetics. I'm pretty certain they could do it. (I've watched them perform their art)
AlmostTrick is offline  
Old 03-22-15, 12:30 AM
Senior Member
Join Date: Feb 2015
Location: Anchorage
Posts: 226

Bikes: Devinci Oslo

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Liked 2 Times in 2 Posts
Leave it alone and come up with a good war story. If you try and have it popped out you very well could loose you bottle cage mount.
David in Alaska
md11mx is offline  
Old 03-22-15, 11:28 AM
Senior Member
CliffordK's Avatar
Join Date: Nov 2014
Location: Eugene, Oregon, USA
Posts: 26,887
Mentioned: 213 Post(s)
Tagged: 0 Thread(s)
Quoted: 15746 Post(s)
Liked 3,166 Times in 2,357 Posts
Being in the seat tube, you might get it out by pushing in a really long pipe the size of the seat post. However, you'd have to be careful. Push it 1/4" too far, and you could mess up the water bottle boss.

I agree with others, the dent won't negatively impact the frame. Just install a rear water bottle cage and ignore it.
CliffordK is online now  
Old 03-22-15, 12:06 PM
Senior Member
Looigi's Avatar
Join Date: Dec 2010
Posts: 8,951
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Likes: 0
Liked 11 Times in 10 Posts
Google "tube dent expanders".
Looigi is offline  
Old 03-22-15, 12:10 PM
A Roadie Forever
79pmooney's Avatar
Join Date: Oct 2014
Location: Portland, OR
Posts: 10,427

Bikes: (2) ti TiCycles, 2007 w/ triple and 2011 fixed, 1979 Peter Mooney, ~1983 Trek 420 now fixed and ~1973 Raleigh Carlton Competition gravel grinder

Mentioned: 113 Post(s)
Tagged: 0 Thread(s)
Quoted: 3409 Post(s)
Liked 2,166 Times in 1,407 Posts
If you do Clifford's approach, mark the tube you use ahead of time so that the mark will hit the top of the seat tube BEFORE the tube hits the waterbottle boss!

If it were me, the cage would always be in place and I would not sweat it. I had a seat tube break at the top of the BB lug while I was racing and it was no big deal. The bike went from a racing bike to a soft tourer instantly; I dropped out and after stopping and looking at the break, got back on and rode to the start/finish (with the saet tube swinging back and forth). If I had to go 30 miles, it probably wouldn't have been a much bigger deal. (That break was from a manufacturer's flaw and a crack that started a couple of months before.) That bike had also been bumped by a car and had a dent bigger than yours on the down tube that was never an issue. Another bike had a top tube dent, also from a car and also bigger than yours. After two years of riding, I had it painted. The painter popped out the dent, probably with blocks. That bike has totaled 8000 miles with the dent and the repair.

79pmooney is online now  
Old 03-22-15, 12:13 PM
Senior Member
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 33,302

Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!

Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 1842 Post(s)
Likes: 0
Liked 789 Times in 569 Posts
Gunsmiths use expanding mandrels to push similar dents out of shotgun barrels so you may be able to find a shop to do that. Realistically, that dent is structurally a non-issue and the bike will last for decades even with it. As noted, cover it up with a bottle cage and water bottle and forget it's there.
HillRider is offline  
Old 03-22-15, 03:48 PM
Senior Member
Join Date: Feb 2009
Posts: 6,602
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 554 Post(s)
Liked 154 Times in 124 Posts
Ride it and forget it. Steel is very forgiving.
davidad is offline  
Related Topics
Thread Starter
Last Post
General Cycling Discussion
09-01-15 11:30 PM
Electronics, Lighting, & Gadgets
02-20-15 03:05 PM
Road Cycling
11-20-14 06:54 PM
Bicycle Mechanics
10-27-13 09:07 AM
Classic and Vintage Bicycles: Whats it Worth? Appraisals.
05-04-12 04:28 PM

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

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.