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

Update: Deng Fu R01/R02 - Broke it yesterday :)

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

Update: Deng Fu R01/R02 - Broke it yesterday :)

Old 09-17-17, 04:49 PM
  #1  
67stang
Banned.
Thread Starter
 
Join Date: Sep 2012
Posts: 61
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 43 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Update: Deng Fu R01/R02 - Broke it yesterday :)

Quick update to my post in March 2017 where I bought/built a Deng Fu R01 frameset.
https://www.bikeforums.net/road-cycli...l#post19586025

6 months of riding and honestly feeling it was as nice of a bike in terms of riding/handling as any other, yesterday it failed. 96 miles into a 100 miles ride, hit a little rise in the asphalt (not a pothole technically) and heard a 'snap' - definitely the sound of carbon. Initial though was maybe a rock or something hit the downtube. I didn't lose control and kept on riding to finish off the ride.

Checked the bike afterwards and sure enough, major failure on the seat tube approx where the seat post would end.

I have emailed Deng Fu with pictures. Not really too concerned about losing the ~$700-800 I paid, as it was an experiment worth taking in my book. But I am curious what their response will be and how they chose to handle this.

In any case, unfortunately, I don't think I'll go the chinese frame route any more unless there is very compelling reason why this failure was an anomaly.


Last edited by 67stang; 09-19-17 at 01:05 PM.
67stang is offline  
Old 09-17-17, 04:53 PM
  #2  
johnnytheboy
Senior Member
 
johnnytheboy's Avatar
 
Join Date: Feb 2008
Location: BANNED.
Posts: 3,899
Mentioned: 37 Post(s)
Tagged: 0 Thread(s)
Quoted: 443 Post(s)
Likes: 0
Liked 12 Times in 7 Posts
wish i had your money. i'd be throwing a fit if an $800 frame snapped on me 6mos in.
although i'd never buy a chinarello frame in the first place.
johnnytheboy is offline  
Old 09-17-17, 05:00 PM
  #3  
woodcraft
Senior Member
 
woodcraft's Avatar
 
Join Date: Apr 2012
Location: Nor Cal
Posts: 5,377
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 1532 Post(s)
Likes: 0
Liked 573 Times in 337 Posts
Yet no dental bills- amazing!
woodcraft is offline  
Old 09-17-17, 05:15 PM
  #4  
rpenmanparker 
Senior Member
 
rpenmanparker's Avatar
 
Join Date: Dec 2009
Location: Houston, TX
Posts: 28,682

Bikes: 1990 Romic Reynolds 531 custom build, Merlin Works CR Ti custom build, super light Workswell 066 custom build

Mentioned: 106 Post(s)
Tagged: 1 Thread(s)
Quoted: 6552 Post(s)
Likes: 0
Liked 47 Times in 30 Posts
Originally Posted by johnnytheboy View Post
wish i had your money. i'd be throwing a fit if an $800 frame snapped on me 6mos in.
although i'd never buy a chinarello frame in the first place.
OP's frame is not a Chinarello. It is not pretending to be anything it is not. It is a Dengfu.
__________________
Robert

Originally Posted by LAJ View Post
No matter where I go, here I am...
rpenmanparker is offline  
Old 09-17-17, 05:16 PM
  #5  
rpenmanparker 
Senior Member
 
rpenmanparker's Avatar
 
Join Date: Dec 2009
Location: Houston, TX
Posts: 28,682

Bikes: 1990 Romic Reynolds 531 custom build, Merlin Works CR Ti custom build, super light Workswell 066 custom build

Mentioned: 106 Post(s)
Tagged: 1 Thread(s)
Quoted: 6552 Post(s)
Likes: 0
Liked 47 Times in 30 Posts
Let's hear what Dengfu says. I'm pretty sure that if they are not responsive, it can be repaired. For how much is the question.
__________________
Robert

Originally Posted by LAJ View Post
No matter where I go, here I am...
rpenmanparker is offline  
Old 09-17-17, 05:48 PM
  #6  
67stang
Banned.
Thread Starter
 
Join Date: Sep 2012
Posts: 61
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 43 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by johnnytheboy View Post
wish i had your money. i'd be throwing a fit if an $800 frame snapped on me 6mos in.
although i'd never buy a chinarello frame in the first place.
but you'd buy an $800 frame... so what exactly is your point?
67stang is offline  
Old 09-17-17, 05:50 PM
  #7  
67stang
Banned.
Thread Starter
 
Join Date: Sep 2012
Posts: 61
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 43 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by rpenmanparker View Post
Let's hear what Dengfu says. I'm pretty sure that if they are not responsive, it can be repaired. For how much is the question.
I have NO interest in having it repaired. (I also didn't have my cracked 2014 S-Works repaired, for the record.)
It just me, but repairing a cracked carbon frame is like owning a car with a salvage title - doesn't matter if it is "as good as new", it's still in your head that it's been compromised
67stang is offline  
Old 09-17-17, 06:02 PM
  #8  
shelbyfv
Banned.
 
Join Date: Jun 2007
Location: TN
Posts: 7,460
Mentioned: 29 Post(s)
Tagged: 0 Thread(s)
Quoted: 1918 Post(s)
Liked 1,435 Times in 798 Posts
Bummer that it happened but you seem to have a proper attitude toward it. You knew it was a crapshoot going in, took your chances. It will be interesting to see if you get a response from the seller, don't forget to update.
shelbyfv is offline  
Old 09-17-17, 06:06 PM
  #9  
tarmacgreg
Senior Member
 
Join Date: Jul 2017
Posts: 53
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
That would have been a stressful 6 months for me...
tarmacgreg is offline  
Old 09-17-17, 06:09 PM
  #10  
Marcus_Ti 
FLIR Kitten to 0.05C
 
Marcus_Ti's Avatar
 
Join Date: Sep 2014
Location: Lincoln, Nebraska
Posts: 5,269

Bikes: Roadie: Seven Axiom Race Ti w/Chorus 11s. CX/Adventure: Carver Gravel Grinder w/ Di2

Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 2302 Post(s)
Liked 341 Times in 220 Posts
A bump in the road did that? Yikes.
Marcus_Ti is offline  
Old 09-17-17, 06:20 PM
  #11  
Jofu
Senior Member
 
Join Date: Jun 2015
Location: Fremont, CA
Posts: 238

Bikes: 2015 Spec Roubaix Expert, 2016 Spec Diverge Expert X1, 2018 Allez Sprint eTap

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 62 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Originally Posted by 67stang View Post
I have NO interest in having it repaired. (I also didn't have my cracked 2014 S-Works repaired, for the record.)
I first chalked the DengFu failure to sub-par quality, but your S-Works also failed. Is there a thread where you documented this other failure? I'm curious to see why you ended up with 2 frame failures, which I thought was very rare (despite many people somehow thinking it happens quite often haha). Not passing judgment, I'm just generally curious what happened since I thought S-Works is generally highly regarded.


Geoff
Jofu is offline  
Old 09-17-17, 06:31 PM
  #12  
johnnytheboy
Senior Member
 
johnnytheboy's Avatar
 
Join Date: Feb 2008
Location: BANNED.
Posts: 3,899
Mentioned: 37 Post(s)
Tagged: 0 Thread(s)
Quoted: 443 Post(s)
Likes: 0
Liked 12 Times in 7 Posts
Originally Posted by 67stang View Post
but you'd buy an $800 frame... so what exactly is your point?
roll your eyes all you want. the big companies have this thing called a "warranty". it's pretty cool. also, you can purchase one of these bike at a "local bike shop" that will go to bat for you.
crazy i know.
johnnytheboy is offline  
Old 09-17-17, 07:09 PM
  #13  
67stang
Banned.
Thread Starter
 
Join Date: Sep 2012
Posts: 61
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 43 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by johnnytheboy View Post
roll your eyes all you want. the big companies have this thing called a "warranty". it's pretty cool. also, you can purchase one of these bike at a "local bike shop" that will go to bat for you.
crazy i know.

The eye roll was specifically in response to the irony of your original comment.
In any case, I have had mixed results with these so called magical warranties - specialized refused to warranty my cracked s-works seat stays, but did offer a crash replacement at $2500 - so I'd be out of pocked "only" ~$5000 lol

And last month after my Roval wheels started showing delamination, same thing...no warranty honoring, just a $600 rebuild by spesh factory servicing.

So again, my point is and always was that a $800 chinese frame experiment is not a big 'loss' for me considering a US branded frame with its magical warranty would be 4x that amount.
67stang is offline  
Old 09-17-17, 07:14 PM
  #14  
67stang
Banned.
Thread Starter
 
Join Date: Sep 2012
Posts: 61
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 43 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Jofu View Post
I first chalked the DengFu failure to sub-par quality, but your S-Works also failed. Is there a thread where you documented this other failure? I'm curious to see why you ended up with 2 frame failures, which I thought was very rare (despite many people somehow thinking it happens quite often haha). Not passing judgment, I'm just generally curious what happened since I thought S-Works is generally highly regarded.


Geoff
Two different scenarios all together, 3 years apart. (FYI I'm only 160lbs, so it's not weight. )
The s-works cracked at both seat stays. Very small cracks, and it is possible one was because the bike fell over while leaning up against a fence. My contention with Spec. was that a $3000 frame shouldn't fail like that, but they said it was caused by an impact, not a defect and would not replace it under warranty. Oh well. I sent it to have repaired but didn't feel it was worth the total cost.

The chinese frame, imo, is a true defective/sub-par failure. At 24-26mph in a pace line I ran over some irregularity in the asphalt...not sure what it was, maybe a low spot, but nothing that took me off my line or caused me to lose control, and it didn't un-true the wheels. Basically just shifted/jarred me enough on the saddle to cause the seat tube failure you see in the pic.

I've had/have other bikes so it's not as if there is any correlation between me and the frame failures - I think
67stang is offline  
Old 09-17-17, 07:15 PM
  #15  
PepeM
Senior Member
 
PepeM's Avatar
 
Join Date: Apr 2015
Posts: 6,841
Mentioned: 180 Post(s)
Tagged: 1 Thread(s)
Quoted: 2723 Post(s)
Liked 99 Times in 47 Posts
Someone needs some bomb-proof equipment.
PepeM is offline  
Old 09-17-17, 07:16 PM
  #16  
datlas 
Beyond Bogus
 
datlas's Avatar
 
Join Date: Dec 2007
Location: Malvern, PA (20 miles West of Philly)
Posts: 33,504

Bikes: 1986 Alpine (steel road bike), 2009 Ti Habenero, 2013 Specialized Roubaix

Mentioned: 470 Post(s)
Tagged: 2 Thread(s)
Quoted: 13314 Post(s)
Liked 2,092 Times in 1,098 Posts
Originally Posted by PepeM View Post
Someone needs some bomb-proof equipment.
Is it bombproof or bulletproof?
__________________
Originally Posted by rjones28 View Post
Addiction is all about class.
datlas is offline  
Old 09-17-17, 07:17 PM
  #17  
PepeM
Senior Member
 
PepeM's Avatar
 
Join Date: Apr 2015
Posts: 6,841
Mentioned: 180 Post(s)
Tagged: 1 Thread(s)
Quoted: 2723 Post(s)
Liked 99 Times in 47 Posts
Originally Posted by datlas View Post
Is it bombproof or bulletproof?
Bombproof wheels and bulletproof frames I think. Maybe I have it backwards.
PepeM is offline  
Old 09-17-17, 07:22 PM
  #18  
datlas 
Beyond Bogus
 
datlas's Avatar
 
Join Date: Dec 2007
Location: Malvern, PA (20 miles West of Philly)
Posts: 33,504

Bikes: 1986 Alpine (steel road bike), 2009 Ti Habenero, 2013 Specialized Roubaix

Mentioned: 470 Post(s)
Tagged: 2 Thread(s)
Quoted: 13314 Post(s)
Liked 2,092 Times in 1,098 Posts
Originally Posted by PepeM View Post
Bombproof wheels and bulletproof frames I think. Maybe I have it backwards.
Agree it's bombproof wheels and BULLETPROOF tires. Not sure about frames.
__________________
Originally Posted by rjones28 View Post
Addiction is all about class.
datlas is offline  
Old 09-17-17, 07:25 PM
  #19  
PepeM
Senior Member
 
PepeM's Avatar
 
Join Date: Apr 2015
Posts: 6,841
Mentioned: 180 Post(s)
Tagged: 1 Thread(s)
Quoted: 2723 Post(s)
Liked 99 Times in 47 Posts
Originally Posted by datlas View Post
Agree it's bombproof wheels and BULLETPROOF tires. Not sure about frames.
Ah yes, you're right. I think frames just go by their asplosive rating.
PepeM is offline  
Old 09-17-17, 07:28 PM
  #20  
datlas 
Beyond Bogus
 
datlas's Avatar
 
Join Date: Dec 2007
Location: Malvern, PA (20 miles West of Philly)
Posts: 33,504

Bikes: 1986 Alpine (steel road bike), 2009 Ti Habenero, 2013 Specialized Roubaix

Mentioned: 470 Post(s)
Tagged: 2 Thread(s)
Quoted: 13314 Post(s)
Liked 2,092 Times in 1,098 Posts
Originally Posted by PepeM View Post
Ah yes, you're right. I think frames just go by their asplosive rating.
Would that be one to five firecrackers? I give this one five firecrackers.
__________________
Originally Posted by rjones28 View Post
Addiction is all about class.
datlas is offline  
Old 09-17-17, 07:47 PM
  #21  
f4rrest
Farmer tan
 
f4rrest's Avatar
 
Join Date: May 2008
Location: Burbank, CA
Posts: 7,986

Bikes: Allez, SuperSix Evo

Mentioned: 38 Post(s)
Tagged: 1 Thread(s)
Quoted: 2870 Post(s)
Liked 24 Times in 20 Posts
Originally Posted by datlas View Post
Would that be one to five firecrackers? I give this one five firecrackers.
It's not BBFYB?

Best bang for your buck?
f4rrest is offline  
Old 09-17-17, 07:49 PM
  #22  
datlas 
Beyond Bogus
 
datlas's Avatar
 
Join Date: Dec 2007
Location: Malvern, PA (20 miles West of Philly)
Posts: 33,504

Bikes: 1986 Alpine (steel road bike), 2009 Ti Habenero, 2013 Specialized Roubaix

Mentioned: 470 Post(s)
Tagged: 2 Thread(s)
Quoted: 13314 Post(s)
Liked 2,092 Times in 1,098 Posts
Originally Posted by f4rrest View Post
It's not BBFYB?

Best bang for your buck?
With emphasis on bang for asplosion tendency?
__________________
Originally Posted by rjones28 View Post
Addiction is all about class.
datlas is offline  
Old 09-17-17, 07:58 PM
  #23  
Sy Reene
Advocatus Diaboli
 
Sy Reene's Avatar
 
Join Date: Feb 2015
Location: Wherever I am
Posts: 6,334

Bikes: Merlin Cyrene, Nashbar steel CX

Mentioned: 11 Post(s)
Tagged: 1 Thread(s)
Quoted: 3235 Post(s)
Liked 550 Times in 397 Posts
Originally Posted by 67stang View Post
Quick update to my post in March 2017 where I bought/built a Deng Fu R01 frameset.
https://www.bikeforums.net/road-cycli...l#post19586025

Checked the bike afterwards and sure enough, major failure on the seat tube approx where the seat post would end.

Am I off-base in thinking that this is pretty low on the seat tube if this is where the end of your seatpost is located? I thought usually a seatpost only went in about 2.5-3" ? Hard to tell from the photo though.
Sy Reene is offline  
Old 09-17-17, 08:03 PM
  #24  
67stang
Banned.
Thread Starter
 
Join Date: Sep 2012
Posts: 61
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 43 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
seat post actually extends about 1.5" below where that crack is
67stang is offline  
Old 09-18-17, 08:53 AM
  #25  
redfooj
pluralis majestatis
 
redfooj's Avatar
 
Join Date: Feb 2004
Location: you rope
Posts: 4,206

Bikes: a DuhRosa

Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 537 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Originally Posted by 67stang View Post
The eye roll was specifically in response to the irony of your original comment.
the true irony is you wanted to save $30 by falsifying your purchase on paypal so if you tried to claim warranty you would have had no legal support anyway.
redfooj is offline  

Thread Tools
Search this Thread

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

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.