Go Back  Bike Forums > Bike Forums > Road Cycling
Reload this Page >

Flopped on bike, now how to tell if a frame is still straight or damaged?

Search
Notices
Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

Flopped on bike, now how to tell if a frame is still straight or damaged?

Thread Tools
 
Search this Thread
 
Old 05-02-18, 01:02 PM
  #1  
shuru421
Senior Member
Thread Starter
 
Join Date: Aug 2012
Posts: 720
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 284 Post(s)
Liked 50 Times in 20 Posts
Flopped on bike, now how to tell if a frame is still straight or damaged?

I literally flopped over like a book trying to unclip, INFRONT of my house as my ride had just finished..
Luckily, I fell onto the grass but still paranoid as this is a very special bike to me. So whats the checklist in ensuring a frame is still straight?

Initially, I got off and checked the frame for any damage, the rear derailleur, the cranks and out of all of the parts (and body parts) only the bartape on the drops (drive side) had a small scratch(tear) and my knee and elbows came out with some scratches. I guess its my paranoia, but can shock from a fall like that affect my stem in which results in damage to the frame from the inside (head tube) or out etc.? Its a quill stem, threaded fork. Thank you.
shuru421 is offline  
Old 05-02-18, 01:08 PM
  #2  
noodle soup
Senior Member
 
noodle soup's Avatar
 
Join Date: Nov 2015
Posts: 8,922
Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 4717 Post(s)
Liked 1,882 Times in 998 Posts
Originally Posted by shuru421
I literally flopped over like a book trying to unclip, INFRONT of my house as my ride had just finished..
Luckily, I fell onto the grass but still paranoid as this is a very special bike to me. So whats the checklist in ensuring a frame is still straight?
Ride it. Does it pull to one side?

I doubt anything is damaged from a fall like that, but be careful when shifting into the largest cog.
noodle soup is offline  
Old 05-02-18, 01:35 PM
  #3  
Jon T
Senior Member
 
Join Date: Jun 2017
Location: West Orange County, CA
Posts: 1,112

Bikes: '84 Peugeot PH10LE

Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 397 Post(s)
Likes: 0
Liked 55 Times in 39 Posts
I did that same thing on my vintage '84 Peugeot (original owner, btw) about 6 months ago. Ran out of seam trying to get my foot into the cage and literally just fell over. Luckily it was the non-drive side. Small scuff on the brake lever and seat edge and the obligatory knee and elbow gash. The bike was/is fine and I hit the tarmac, not a soft landing as you experienced. My gut tells me that your bike is fine and you're stressing over a non-issue.
Jon
Jon T is offline  
Old 05-02-18, 01:55 PM
  #4  
Abe_Froman
Senior Member
 
Abe_Froman's Avatar
 
Join Date: Aug 2016
Location: Chicago
Posts: 2,524

Bikes: Marin Four Corners, 1960's Schwinn Racer in middle of restoration, mid 70s Motobecane Grand Touring, various other heaps.

Mentioned: 76 Post(s)
Tagged: 0 Thread(s)
Quoted: 9347 Post(s)
Liked 57 Times in 51 Posts
Quill stem so I assume steel frame...I'd worry about your scrapes getting infected far more than the frame. Get out the H2O2 before you start thinking about a frame x-ray...
Abe_Froman is offline  
Old 05-02-18, 05:05 PM
  #5  
TrojanHorse
SuperGimp
 
TrojanHorse's Avatar
 
Join Date: Mar 2010
Location: Whittier, CA
Posts: 13,346

Bikes: Specialized Roubaix

Mentioned: 147 Post(s)
Tagged: 0 Thread(s)
Quoted: 1107 Post(s)
Liked 64 Times in 47 Posts
Put the bike in a workstand (or get somebody to hold the seat up for you) and run through all the gears. If the gears shift, nothing's rubbing... you're probably OK.

I mean, you tipped over - you didn't endo over a cliff. It happens.
TrojanHorse is offline  
Old 05-02-18, 05:12 PM
  #6  
cthenn
Senior Member
 
Join Date: Jan 2010
Location: Walnut Creek, CA
Posts: 2,668

Bikes: 2023 Canyon Aeoroad CF SL, 2015 Trek Emonda SLR, 2002 Litespeed Classic, 2005 Bianchi Pista, Some BikesDirect MTB I never ride.

Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 647 Post(s)
Liked 136 Times in 89 Posts
Bikes are tougher than a drop like that, onto grass...the parts attached may get out of whack a little bit (rear derailleur, shifter, etc), but unless you fell with the full force of your body weight on the middle of the top tube, I doubt you did any damage to the actual frame.
cthenn is offline  
Old 05-03-18, 04:10 AM
  #7  
Maelochs
Senior Member
 
Maelochs's Avatar
 
Join Date: Oct 2015
Posts: 15,496

Bikes: 2015 Workswell 066, 2017 Workswell 093, 2014 Dawes Sheila, 1983 Cannondale 500, 1984 Raleigh Olympian, 2007 Cannondale Rize 4, 2017 Fuji Sportif 1 LE

Mentioned: 144 Post(s)
Tagged: 0 Thread(s)
Quoted: 7653 Post(s)
Liked 3,484 Times in 1,840 Posts
You have to strip the frame, first---take off every part bolted to it.

Then, using an angle grinder or an industrial bandsaw if you can get one, saw the frame in half lengthwise.

Lay the two halves out on a sheet of cardboard. Put tracing paper under one half.

Trace both frame halves, then lay the tracing paper over the outline on the cardboard.

You should only see one line.
Maelochs is offline  
Old 05-03-18, 04:12 AM
  #8  
Maelochs
Senior Member
 
Maelochs's Avatar
 
Join Date: Oct 2015
Posts: 15,496

Bikes: 2015 Workswell 066, 2017 Workswell 093, 2014 Dawes Sheila, 1983 Cannondale 500, 1984 Raleigh Olympian, 2007 Cannondale Rize 4, 2017 Fuji Sportif 1 LE

Mentioned: 144 Post(s)
Tagged: 0 Thread(s)
Quoted: 7653 Post(s)
Liked 3,484 Times in 1,840 Posts
Seriously, if your bike were fragile enough that the frame would bend from a simple clip-fall, it wouldn't be safe to ride.

Maybe sure the saddle is in line and the brifters are angled right, and go do a clip-fall Properly .... in front of a crowd.
Maelochs is offline  
Old 05-03-18, 05:24 AM
  #9  
colombo357
Senior Member
 
colombo357's Avatar
 
Join Date: Oct 2007
Location: Murica
Posts: 2,284
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 120 Post(s)
Liked 30 Times in 12 Posts
It's probably toast.
colombo357 is offline  
Old 05-03-18, 09:47 AM
  #10  
RGMN
Senior Member
 
Join Date: Feb 2018
Posts: 567
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 241 Post(s)
Liked 232 Times in 153 Posts
If you really think you bent the frame do a simple alignment check. Remove the rear wheel, take a string and run it out one dropout, around the head tube, then back to the dropout on the other side. Pull the string tight, and then measure from the string to the seat tube on both sides. These measurements should be identical. If they aren’t you bent the frame.
RGMN is offline  
Old 05-03-18, 02:35 PM
  #11  
jordanair45
Banned.
 
Join Date: Aug 2014
Location: Your Moms House
Posts: 273

Bikes: 16' SS Hi-Mod, 15' CAAD12

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 108 Post(s)
Liked 2 Times in 1 Post
Mmmm. OP, you're proabably fine. Bike is ok! Fell on grass, Speed approaching 0. You hit the ground, bike used you as a pillow.
jordanair45 is offline  
Old 05-03-18, 11:26 PM
  #12  
yamsyamsyams
Senior Member
 
Join Date: Dec 2011
Posts: 305
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 44 Post(s)
Liked 41 Times in 20 Posts
You’ll likely need to get it replaced under warranty hopefully.
yamsyamsyams is offline  
Old 05-04-18, 12:03 AM
  #13  
GeneO 
Senior Member
 
GeneO's Avatar
 
Join Date: May 2010
Location: midwest
Posts: 2,528

Bikes: 2018 Roubaix Expert Di2, 2016 Diverge Expert X1

Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 482 Post(s)
Liked 151 Times in 105 Posts
Sounds like you flopped over on the drive side. Your body probably prevented the rear derailleur hanger form bending - have you checked that it shifts OK? If it doesn't then the hanger can be replaced.
I doubt it did any other damage, your bod probably protected it
GeneO is offline  
Old 05-04-18, 03:08 AM
  #14  
Maelochs
Senior Member
 
Maelochs's Avatar
 
Join Date: Oct 2015
Posts: 15,496

Bikes: 2015 Workswell 066, 2017 Workswell 093, 2014 Dawes Sheila, 1983 Cannondale 500, 1984 Raleigh Olympian, 2007 Cannondale Rize 4, 2017 Fuji Sportif 1 LE

Mentioned: 144 Post(s)
Tagged: 0 Thread(s)
Quoted: 7653 Post(s)
Liked 3,484 Times in 1,840 Posts
Originally Posted by colombo357
It's probably toast.
That's my thought. Replace the bike and rider immediately. Both are likely damaged internally and invisibly in ways which could lead to catastrophic failure in the next hundred years or so.
Maelochs is offline  
Old 05-04-18, 03:24 AM
  #15  
1500SLR
Banned.
 
Join Date: Mar 2018
Posts: 443

Bikes: Trek 1500 SLR DI2 Giant Kronos SRAM Rival

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 301 Post(s)
Likes: 0
Liked 5 Times in 4 Posts
As others have said, that kind of tip over where your shoulder cushions the fall is more likely to be a bruise of your ego than your bike. Just don't make a habit of doing it.
1500SLR is offline  
Old 05-04-18, 10:42 AM
  #16  
mpath
Recusant Iconoclast
 
mpath's Avatar
 
Join Date: Jan 2011
Location: Tsawwassen, BC
Posts: 2,560

Bikes: Look 695, Wilier Izoard

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 247 Post(s)
Liked 58 Times in 29 Posts
Originally Posted by Maelochs
Seriously, if your bike were fragile enough that the frame would bend from a simple clip-fall, it wouldn't be safe to ride.

Maybe sure the saddle is in line and the brifters are angled right, and go do a clip-fall Properly .... in front of a crowd.
LOL...been there, done that!
mpath is offline  
Old 05-22-18, 08:39 AM
  #17  
Brandonyatessr
Senior Member
 
Join Date: Apr 2018
Posts: 62
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 19 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Good exuse for a new bike... Put your "special" bike on your living room wall lol
Brandonyatessr is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Eddie72
Fitting Your Bike
18
10-16-17 07:44 AM
mikehattan
Clydesdales/Athenas (200+ lb / 91+ kg)
7
08-31-11 07:25 AM
Ratzinger
Bicycle Mechanics
5
05-30-11 03:08 PM
ludwig
Bicycle Mechanics
9
01-02-11 05:18 PM
tempz
Bicycle Mechanics
12
05-06-10 12:13 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



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.