Go Back  Bike Forums > Bike Forums > General Cycling Discussion
Reload this Page >

Carbon bikes on hitch mount racks

Notices
General Cycling Discussion Have a cycling related question or comment that doesn't fit in one of the other specialty forums? Drop on in and post in here! When possible, please select the forum above that most fits your post!

Carbon bikes on hitch mount racks

Old 10-21-11, 10:21 AM
  #1  
cleon
Recently Addicted
Thread Starter
 
cleon's Avatar
 
Join Date: Jul 2011
Location: Front Range, CO
Posts: 521

Bikes: M1 w/105

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Carbon bikes on hitch mount racks

Is there any problem with using the standard rack that holds a bike up by the top tube? I see it done all the time but the manuals all say 'DON'T!'??

cleon is offline  
Old 10-21-11, 10:39 AM
  #2  
mechBgon
Senior Member
 
mechBgon's Avatar
 
Join Date: Jul 2002
Posts: 6,957
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 4 Times in 4 Posts
I have one customer's carbon frame in the warranty pipeline right now with two cracks in his top tube (which the company was not going to cover under warranty) and a fortuitous crack in his chainstay which they *might* cover after getting a firsthand look at it. Anyway, it's up to you but the safe money is on supporting it by the wheels, particularly if it's high-end thin-walled carbon.
mechBgon is offline  
Old 10-21-11, 10:57 AM
  #3  
cleon
Recently Addicted
Thread Starter
 
cleon's Avatar
 
Join Date: Jul 2011
Location: Front Range, CO
Posts: 521

Bikes: M1 w/105

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Thanks. I appreciate the perspective. So go with something like this if I prefer hitch mounts?
And I assume all the major brands are created roughly equal? (Thule, Yakima, Saris)
Attached Images
cleon is offline  
Old 10-21-11, 11:03 AM
  #4  
dpeters11
Senior Member
 
Join Date: Aug 2010
Posts: 477

Bikes: 2010 Trek FX 7.5, 2011 Trek 2.1

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Not to threadjack, but we have a Thelma2, which is one of the ones that uses wheel support. We took our bikes on a couple of hour road trip and the winds got quite high (gusts may have hit 40mph and we were at Interstate speeds). I had the straps tight and the rack as tight as I could get it, but the bikes still moved quite a lot. My wife was concerned that the movement could cause damage to the fork or stays (I think she was thinking of the movement causing torque etc.)

I told her I didn't think that was an issue, but who would be right? She's really sensitive about her bike right now.
dpeters11 is offline  
Old 10-21-11, 11:13 AM
  #5  
cleon
Recently Addicted
Thread Starter
 
cleon's Avatar
 
Join Date: Jul 2011
Location: Front Range, CO
Posts: 521

Bikes: M1 w/105

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
There are a few that still support the top tube, albeit probably with a lot less stress, that might eliminate some of that movement? I'm thinking of the Yakima Stick up for example,
Attached Images
cleon is offline  
Old 10-21-11, 12:54 PM
  #6  
CraigB
Starting over
 
CraigB's Avatar
 
Join Date: Jun 2005
Location: Indianapolis
Posts: 4,077

Bikes: 1990 Trek 1500; 2006 Gary Fisher Marlin; 2011 Cannondale Synapse Alloy 105; 2012 Catrike Trail

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Likes: 0
Liked 1 Time in 1 Post
I've wondered about the same thing with hydroformed aluminum frames.
CraigB is offline  
Old 10-21-11, 04:57 PM
  #7  
cleon
Recently Addicted
Thread Starter
 
cleon's Avatar
 
Join Date: Jul 2011
Location: Front Range, CO
Posts: 521

Bikes: M1 w/105

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I remember cringing when I went over a couple of speedbumps and saw both my wife and my carbon top tubes bouncing up and down off the bike rack supports. Just didn't feel right...and I think her 'owner's manual' specifically cautioned against it.
cleon is offline  
Old 10-21-11, 05:33 PM
  #8  
Looigi
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 7 Times in 6 Posts
I've put carbon bikes on hitch racks as pictured without issues for years. Now have a Thelma II and no issues with that either. Usually though, I just throw the bike in the back of the SUV.
Looigi is offline  
Old 10-21-11, 05:54 PM
  #9  
ahsposo 
Rock Hard Member
 
ahsposo's Avatar
 
Join Date: Jan 2010
Location: Outside the Box
Posts: 7,134

Bikes: A Home Built All Rounder, Bianchi 928, Specialized Langster, Dahon Folder

Mentioned: 26 Post(s)
Tagged: 0 Thread(s)
Quoted: 5173 Post(s)
Liked 2,290 Times in 1,368 Posts
Originally Posted by Looigi View Post
I've put carbon bikes on hitch racks as pictured without issues for years. Now have a Thelma II and no issues with that either. Usually though, I just throw the bike in the back of the SUV.
Carbon bikes are SO fragile. They asplode you know.

Of course that's why the smartest aerospace engineers are building state of the art jet passengenger planes from carbon. They are sick SOB's that love a big multifatality asplosion.
ahsposo is offline  
Old 10-21-11, 06:57 PM
  #10  
cleon
Recently Addicted
Thread Starter
 
cleon's Avatar
 
Join Date: Jul 2011
Location: Front Range, CO
Posts: 521

Bikes: M1 w/105

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
The nice thing about open forums is that there is no lower age limit so even the 12-yr olds can post.
cleon is offline  
Old 10-23-11, 04:48 PM
  #11  
mulveyr 
Senior Member
 
mulveyr's Avatar
 
Join Date: Feb 2010
Location: In the wilds of NY
Posts: 1,566

Bikes: Box Dog Pelican, Raleigh Sojourn, Specialized Secteur, 1991 Cannondale tandem

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 39 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Originally Posted by ahsposo View Post
Carbon bikes are SO fragile. They asplode you know.
Ob: https://www.bustedcarbon.com/


Originally Posted by ahsposo View Post
Of course that's why the smartest aerospace engineers are building state of the art jet passengenger planes from carbon. They are sick SOB's that love a big multifatality asplosion.
I suspect that there aren't too many bike designers spending millions of dollars stress-modeling frames under all conceivable environmental conditions. Like, say, Boeing or Airbus does.

Obviously carbon works great the vast majority of the time. Just as obviously, it has to be treated differently than metal in a variety of situations, even ones as prosaic as tightening a bolt.
__________________
Knows the weight of my bike to the nearest 10 pounds.
mulveyr is offline  
Old 10-23-11, 10:57 PM
  #12  
kevin_stevens
Senior Member
 
Join Date: Jun 2011
Posts: 363
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by cleon View Post
I remember cringing when I went over a couple of speedbumps and saw both my wife and my carbon top tubes bouncing up and down off the bike rack supports. Just didn't feel right...and I think her 'owner's manual' specifically cautioned against it.
If you check the owner's manual, I think it says you're supposed to let your wife ride inside the car...

KeS
kevin_stevens is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
TKJava
General Cycling Discussion
21
01-12-19 07:59 PM
Rstyle
General Cycling Discussion
7
07-29-17 08:17 PM
justin_nj
Road Cycling
35
06-11-12 03:45 PM
Watchdog
Road Cycling
1
06-23-11 07:53 PM
InsanityBeckons
Road Cycling
65
10-19-10 08:48 AM

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.