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


Go Back   > >

Folding Bikes Discuss the unique features and issues of folding bikes. Also a great place to learn what folding bike will work best for your needs.

View Poll Results: make of your cracked folding frame
Dahon (specify model) 5 41.67%
Downtube 2 16.67%
Brompton 3 25.00%
Bike Friday (specify model) 1 8.33%
Xootr Swift (specify steel ot alu) 1 8.33%
Birdy 0 0%
other model (specify) 0 0%
Multiple Choice Poll. Voters: 12. You may not vote on this poll

User Tag List

Reply
 
Thread Tools Search this Thread
Old 08-18-09, 09:01 PM   #1
ChiapasFixed
hipster traffic dodger
Thread Starter
 
ChiapasFixed's Avatar
 
Join Date: Dec 2007
Bikes: IRO Mark V Pro, home made bamboo track bike, eddy merckx corsa extra, Airnimal Joey commute, UGADA Tikit
Posts: 596
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
folding bike frames crack tendency poll

well folks, there has been some discussion and finger pointing lately around the issue of cracks appearing in the frames of certain folding bikes. because folders are subject to different kind of stresses sue to long seatposts, clamps, etc, they may be more prone to this kind of thing. In any case, it may be interesting for all sufferers of this kind of misfortune to tell us the make of their bike and any other useful info regarding frame cracks (repair possibilities, warranty coverage, etc.)
So, what make was YOUR cracked bike?:
ChiapasFixed is offline   Reply With Quote
Old 08-19-09, 06:09 AM   #2
jakub.ner
Senior Member
 
Join Date: Jun 2005
Location: London, Ontario
Bikes: 2 Xootr Swifts, Dahon Curve, Oxford Winter Beater.
Posts: 518
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
For me it was a Dahon Vitesse. Cracked at seat tube joint. Didn't replace, stripped parts and recycled the frame.
jakub.ner is offline   Reply With Quote
Old 08-19-09, 06:30 AM   #3
PDR
Senior Member
 
Join Date: Jan 2008
Location: Cheshire, North West England, UK
Bikes: Brompton S2L-X, Bridgestone Moulton, 1963 & 1966 Moultons, Scott Mountain bike
Posts: 559
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Not cracks in my case, but I had 2 Dahon MU SLís within the space of a year that both developed serious wear in the hinges. Both bikes where replaced under warrantee. Needless to say, I switched to Bromptons and Moultons (far better build quality) and would never buy a Dahon product ever again.
PDR is offline   Reply With Quote
Old 08-19-09, 08:14 AM   #4
Bacciagalupe
Professional Fuss-Budget
 
Bacciagalupe's Avatar
 
Join Date: Aug 2005
Bikes:
Posts: 6,438
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Collecting anecdotes from forum users is not going to give you any usable information about the quality of a manufacturer's frames.

Unfortunately the only reliable figures would come from the manufacturers (and *possibly* a bike mechanic or retailer with a lot of business), who aren't likely to give you any hard numbers.
Bacciagalupe is offline   Reply With Quote
Old 08-19-09, 08:30 AM   #5
brakemeister 
New usename ThorUSA
 
brakemeister's Avatar
 
Join Date: Nov 2004
Location: Southern Illinois USA
Bikes:
Posts: 2,469
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
lol

with about 10 times more ( maybe more than that ) Dahons sold than all of the other combined this poll doesnt make any sense ......

I am sorry
thor
__________________
www.thorusa.com
Dahon : Freedom Unfolds
Tern : all about the ride
brakemeister is offline   Reply With Quote
Old 08-19-09, 10:34 AM   #6
kamtsa
Senior Member
 
kamtsa's Avatar
 
Join Date: Dec 2008
Bikes:
Posts: 1,815
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
100 years of bike development and we still have cracked frames and flat tires. We should do better than that.

Kam
kamtsa is offline   Reply With Quote
Old 08-19-09, 05:29 PM   #7
datako
Senior Member
 
Join Date: Dec 2005
Bikes:
Posts: 217
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by kamtsa View Post
100 years of bike development and we still have cracked frames and flat tires. We should do better than that.

Kam
We can but people don't want a heavy bike.

The alternative is very expensive light bikes and there's a very thin market at that end.
datako is offline   Reply With Quote
Old 08-19-09, 10:14 PM   #8
ChiapasFixed
hipster traffic dodger
Thread Starter
 
ChiapasFixed's Avatar
 
Join Date: Dec 2007
Bikes: IRO Mark V Pro, home made bamboo track bike, eddy merckx corsa extra, Airnimal Joey commute, UGADA Tikit
Posts: 596
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by brakemeister View Post
lol

with about 10 times more ( maybe more than that ) Dahons sold than all of the other combined this poll doesnt make any sense ......

I am sorry
thor
true, but some interesting info is already coming out! for example: i had never herd of xootr swifts cracking before! too bad the posted did not specify whether it was the steel or aluminum version...

it is also useful for people to see that this is something that does happen, and to be able to relate to others' stories/experiences/solutions
ChiapasFixed is offline   Reply With Quote
Old 08-19-09, 10:51 PM   #9
Joako
Senior Member
 
Join Date: Jul 2008
Bikes:
Posts: 262
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by ChiapasFixed View Post
too bad the posted did not specify whether it was the steel or aluminum version...
This was an issue with the earlier aluminum frames (seatube and chainstay cracked or split off, see the swift thread). Xootr has increased the tubing thickness on the newer frames. This increased the weight a bit, but I haven't seen or heard any complaints after this.
Joako is offline   Reply With Quote
Old 08-20-09, 07:08 AM   #10
feijai
Senior Member
 
Join Date: May 2007
Location: Washington, DC
Bikes:
Posts: 897
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Quote:
Originally Posted by brakemeister View Post
with about 10 times more ( maybe more than that ) Dahons sold than all of the other combined this poll doesnt make any sense ......
Don't worry, I'm sure it'll get weighted into rates at the end, and we'll have a large enough sample to eliminate the noise. Yeah, that's it.
feijai is offline   Reply With Quote
Old 08-20-09, 09:16 AM   #11
Foldable Two
Senior Member
 
Foldable Two's Avatar
 
Join Date: Aug 2005
Location: Vancouver, Washington and Ocean Shores, Washington, USA
Bikes: 2 - 2007 Custom Bike Fridays, 2 - 2009 Bike Friday Pocket 8's, Gravity 29'er SS, 2 - 8-spd Windsor City Bikes, 1973 Raleigh 20 & a 1964 Schwinn Tiger
Posts: 1,319
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The only solution is solid frames and tires...plus an engine!
Foldable Two is offline   Reply With Quote
Old 08-20-09, 04:49 PM   #12
datako
Senior Member
 
Join Date: Dec 2005
Bikes:
Posts: 217
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by feijai View Post
Don't worry, I'm sure it'll get weighted into rates at the end, and we'll have a large enough sample to eliminate the noise. Yeah, that's it.
I hope so, because on the figures so far, Dahon and Brompton are equal. Seeing as about 100 times more Dahons are sold than Bromptons, that suggests on the current figures that a Brompton is 100 times more likely to crack!

And Swifts are about 1,000 times more likely to crack than a Dahon.

Relax fans, I don't actually think that is the case
datako is offline   Reply With Quote
Old 08-20-09, 09:08 PM   #13
K6-III
Senior Member
 
Join Date: Jul 2003
Location: Brooklyn, NY
Bikes:
Posts: 1,453
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Seat tube cracked on my '09 Downtube Mini. Horizontal crack radiating from stress relief hole at seat-post clamp area of seat tube. Its replacement is on the way (warranty).
K6-III is offline   Reply With Quote
Old 08-22-09, 06:34 AM   #14
EvilV
Bicycling Gnome
 
Join Date: Apr 2006
Location: 55.0N 1.59W
Bikes:
Posts: 1,877
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Merc. Frame cracked and failed at seat tube joint. Long steel seat tube always at max extension. 4000 miles of riding. about 3 years old.

The failure was not catastrophic because there is a tough plastic insert inside the frame at this point. No accident would have happened without warning because the plastic insert holds everything together rather strongly. It took a persistent effort with tools to remove the plastic insert and cause the parts to separate.
EvilV 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 05:35 AM.