Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About
It is currently Wed Jun 29, 2016 5:33 pm
Recently the board software has been updated and there are some known bugs/failures:
- Avatars are currently not being displayed ✔ FIXED
- Tapatalk connection is currently broken ✔ FIXED
- Avatars cannot be uploaded ✔ FIXED

Please note that we will soon do some changes in WW board template design in case to get a fully mobile/desktop responsiveness board!
If you find more errors please post it here: http://weightweenies.starbike.com/forum/viewtopic.php?f=7&t=139062


All times are UTC+01:00





Post new topic  Reply to topic  [ 20 posts ]  Go to page 1 2 Next
Author Message
PostPosted: Sun Mar 09, 2014 9:07 pm 
Offline
User avatar

Joined: Fri Apr 12, 2013 1:19 pm
Posts: 742
Location: South West England
So today I noticed a rather nasty crack around my BB shell. I think it may have been there for some time undetected. I raced on it today with no issues (bar a few creaks) and have two races booked next weekend. I'm desperate not to miss them and won't be able to sort out a replacement frame in time. Am I safe to ride it? Also is something like this legitimately fixable, or is it just a case of bodging as a temporary measure?

Image
Image

_________________
Scott CR1 - 7.1kg - cracked
BMC SLR02 - 7.6kg - cracked too...
Kinesis Aithein - 6.9kg - hit by car!

MASON Definition | Camapgnolo Chorus/Potenza | TRP Spyre SLC | Novatec CXD - TBC


Top
   
PostPosted: Sun Mar 09, 2014 11:16 pm 
Offline

Joined: Fri Feb 27, 2004 3:56 pm
Posts: 198
I had something very similar with my Cannondale Supersix. In all probability it had been there a while and was raced/ridden for quite a while before it properly broke (it was an eBay purchase so no chance of a refund). The carbon repair specialist I took it to had a good look and declared it unfixable. It is still sitting in my shed...

The most annoying thing was that the weekend before it properly broke I finished a close 2nd in a road race not realising I was riding a cracked frame...


Top
   
PostPosted: Mon Mar 10, 2014 12:25 am 
Offline
User avatar

Joined: Fri Dec 11, 2009 10:38 pm
Posts: 1550
Location: Welland, Ontario
It's a high stress area where the alloy BB insert bonds into the frame.

When it breaks, you'll probably experience a wobbly crank. So, I don't see a failure as life threatening but could be noticeable.

_________________
There's sometimes a buggy.
How many drivers does a buggy have?

One.

So let's just say I'm drivin' this buggy...
and if you fix your attitude you can ride along with me.

http://www.youtube.com/watch?v=GekiIMh4ZkM


Top
   
PostPosted: Mon Mar 10, 2014 12:45 am 
Offline
User avatar

Joined: Fri Apr 12, 2013 1:19 pm
Posts: 742
Location: South West England
I'm pretty ready to call it a day with this frame so have no issue running it into the ground while a replacement arrives (BMC is calling me...) As long as it lasts me until this then I don't mind too much; providing failure doesn't risk crank touching tarmac and testicles touching top tube...

_________________
Scott CR1 - 7.1kg - cracked
BMC SLR02 - 7.6kg - cracked too...
Kinesis Aithein - 6.9kg - hit by car!

MASON Definition | Camapgnolo Chorus/Potenza | TRP Spyre SLC | Novatec CXD - TBC


Top
   
PostPosted: Mon Mar 10, 2014 1:19 am 
Offline

Joined: Sun Mar 02, 2014 6:36 pm
Posts: 325
Location: NY USA
I'm not an expert on this, and don't know if it would work....

Since the frame is destined for the scrap-bin, if you MUST ride it in the meantime... I'd try:

- Sand the CF all along the crack area
- Use a two-part epoxy, force the epoxy into the crack as best you can.

The sanding was to give the excess epoxy something to grab.

Work FAST with the epoxy. It heats as you mix it, the hotter it is, the easier it will be to flow it deeper into the crack.

_________________
Trek Madone 7.9 58cm 14.9lbs


Top
   
PostPosted: Mon Mar 10, 2014 1:42 am 
Offline
Shop Owner

Joined: Sun Jan 03, 2010 4:58 am
Posts: 673
If you had to use epoxy, try putting the frame in a vacuum [inside the tubes] then apply the epoxy. It will for certain, suck into the crack. Still, I would not think it would last long. Check to find out though.


Top
   
PostPosted: Mon Mar 10, 2014 2:55 am 
Offline
User avatar

Joined: Fri Dec 11, 2009 10:38 pm
Posts: 1550
Location: Welland, Ontario
I had a similar situation.

Buy this epoxy.

Image

Drill small holes at about 1/4" increments around the crack. just through the carbon - not the alloy sleeve.

Pump in the epoxy.

_________________
There's sometimes a buggy.
How many drivers does a buggy have?

One.

So let's just say I'm drivin' this buggy...
and if you fix your attitude you can ride along with me.

http://www.youtube.com/watch?v=GekiIMh4ZkM


Top
   
PostPosted: Mon Mar 10, 2014 9:38 am 
Offline
User avatar

Joined: Fri Apr 12, 2013 1:19 pm
Posts: 742
Location: South West England
Epoxy was the plan; I have a friend with GRP experience who's offered to patch it for me. Would it be wise to add some external fibreglass sheets too? I'm not bothered about how it looks, besides, battle scars are cool 8)

_________________
Scott CR1 - 7.1kg - cracked
BMC SLR02 - 7.6kg - cracked too...
Kinesis Aithein - 6.9kg - hit by car!

MASON Definition | Camapgnolo Chorus/Potenza | TRP Spyre SLC | Novatec CXD - TBC


Top
   
PostPosted: Mon Mar 10, 2014 1:56 pm 
Offline
Shop Owner

Joined: Sun Jan 03, 2010 4:58 am
Posts: 673
The problem is on the inside. Adding material to the outside would do nothing but add 'battle scars'. Suck the epoxy on the inside and put the battle scar material on the outside and you will have exactly what you are looking for.

Start shopping for a frame too.


Top
   
PostPosted: Mon Mar 10, 2014 2:22 pm 
Offline
User avatar

Joined: Fri Apr 12, 2013 1:19 pm
Posts: 742
Location: South West England
By putting material on the outside would it not aid in preventing the crack from pulling out further?

_________________
Scott CR1 - 7.1kg - cracked
BMC SLR02 - 7.6kg - cracked too...
Kinesis Aithein - 6.9kg - hit by car!

MASON Definition | Camapgnolo Chorus/Potenza | TRP Spyre SLC | Novatec CXD - TBC


Top
   
PostPosted: Mon Mar 10, 2014 2:36 pm 
Offline
User avatar

Joined: Fri Dec 11, 2009 10:38 pm
Posts: 1550
Location: Welland, Ontario
If you get enough epoxy on the inside, between the alloy insert and the carbon shell, all the way around, then some will bear against the uncracked inner side too, and help support the insert. It will be a lot more effective than a patch on the outside.

Regardless, it's toast.

_________________
There's sometimes a buggy.
How many drivers does a buggy have?

One.

So let's just say I'm drivin' this buggy...
and if you fix your attitude you can ride along with me.

http://www.youtube.com/watch?v=GekiIMh4ZkM


Top
   
PostPosted: Mon Mar 10, 2014 2:41 pm 
Offline
User avatar

Joined: Fri Apr 12, 2013 1:19 pm
Posts: 742
Location: South West England
Oh, I meant do both! Use a GRP patch on the outside to help support the epoxy in the centre. Literally just want it to last the weekend. Am ordering a new frame today/tomorrow...

_________________
Scott CR1 - 7.1kg - cracked
BMC SLR02 - 7.6kg - cracked too...
Kinesis Aithein - 6.9kg - hit by car!

MASON Definition | Camapgnolo Chorus/Potenza | TRP Spyre SLC | Novatec CXD - TBC


Top
   
PostPosted: Mon Mar 10, 2014 7:52 pm 
Offline

Joined: Tue Apr 05, 2011 7:41 pm
Posts: 630
if it fails in the race and you take down a load of people as result, you ain't gonna be popular. Why risk an injury to you or others?


Top
   
PostPosted: Mon Mar 10, 2014 10:10 pm 
Offline
User avatar

Joined: Sat Sep 05, 2009 11:20 am
Posts: 1402
Yeah thats my view point as well.

_________________
"Step forward the climber and all those who worship at the altar of lightness" - R. Millar


Top
   
PostPosted: Mon Mar 10, 2014 10:28 pm 
Offline
Shop Owner

Joined: Sun Jan 03, 2010 4:58 am
Posts: 673
If you race like I do, it won't be a problem. It's lonely at the rear.


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 20 posts ]  Go to page 1 2 Next

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. How to tell if you have cracked frame?

[ Go to page: 1 2 ]

in Road

addictR1

21

1851

Wed Sep 16, 2015 7:57 am

addictR1 View the latest post

There are no new unread posts for this topic. Hed Ardennes Hub cracked

in Everything wheels

mariovalentim

4

430

Sun Apr 17, 2016 4:37 pm

Shogunade View the latest post

There are no new unread posts for this topic. seat stay cracked?

in Road

addictR1

10

671

Thu Oct 01, 2015 12:45 am

AJS914 View the latest post

There are no new unread posts for this topic. Cracked paint around BB area on new Ridley.

[ Go to page: 1 2 ]

in Road

cdtf

29

2159

Sun Jun 26, 2016 11:54 am

fh8425 View the latest post

There are no new unread posts for this topic. WTB Cracked/damaged frame size 52-54-56cm

in Wanted

bikemaniack

0

89

Fri Mar 18, 2016 8:44 am

bikemaniack View the latest post


All times are UTC+01:00


Who is online

Users browsing this forum: DOMinator and 4 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited