can this be repaired?
05-15-17, 10:34 AM
#1
commu*ist spy
Thread Starter
can this be repaired?
not mine, but a local repair guy keeps posting pics like this. He's got multiple projects going on at the same time. one of them is a drop out. I don't know to decide whether it's amazing or lunacy
05-15-17, 10:55 AM
#2
Senior Member
Join Date: Jun 2013
Location: Bozeman
Posts: 4,094
Bikes: 199? Landshark Roadshark, 198? Mondonico Diamond, 1987 Panasonic DX-5000, 1987 Bianchi Limited, Univega... Chrome..., 1989 Schwinn Woodlands, Motobecane USA Record, Raleigh Tokul 2
Mentioned: 25 Post(s)
Tagged: 0 Thread(s)
Quoted: 1131 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Anything can be repaired with enough money.
However, I certainly wouldn't attempt it.
However, I certainly wouldn't attempt it.
05-15-17, 11:09 AM
#3
Senior Member
Join Date: May 2017
Location: Mid-Atlantic, USA
Posts: 357
Bikes: S-Works Tarmac 2017 - TREK Madone - Cannondale CAPO
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 206 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
+1..I would NOT attempt it either. Looks pretty bad!
05-15-17, 11:23 AM
#4
Senior Member
Join Date: Nov 2014
Location: Eugene, Oregon, USA
Posts: 27,547
Mentioned: 217 Post(s)
Tagged: 0 Thread(s)
Quoted: 18350 Post(s)
Liked 4,502 Times
in
3,346 Posts
There are shops that specialize in CF repair. And, each one may be different with what they choose to work on and what they choose to skip.
The original bike was made up of multiple layers of CF, so there is no reason not to grind it out and replace with new CF. It should be ground out to the bottom of the crack, then have the patch spread out in a wide V shape. Perhaps also build up a little extra if one desires.
In the above case, the bottom bracket may be in a bad spot making the repair more difficult, but probably not impossible, especially if the bottom bracket shell hasn't been impacted.
If done with care, it should be as good as new, although there is quite some stigma against damaged CF in the bike world
The original bike was made up of multiple layers of CF, so there is no reason not to grind it out and replace with new CF. It should be ground out to the bottom of the crack, then have the patch spread out in a wide V shape. Perhaps also build up a little extra if one desires.
In the above case, the bottom bracket may be in a bad spot making the repair more difficult, but probably not impossible, especially if the bottom bracket shell hasn't been impacted.
If done with care, it should be as good as new, although there is quite some stigma against damaged CF in the bike world
05-15-17, 12:05 PM
#6
Senior Member
Join Date: Mar 2008
Posts: 8,688
Mentioned: 46 Post(s)
Tagged: 0 Thread(s)
Quoted: 1074 Post(s)
Liked 295 Times
in
222 Posts
There's no principal difference between a CF repair and a fibreglass repair.
The challenge is mainly in the scarfing, if a really discrete repair is needed/desired.
With fibreglass, a scarf 10x the thickness of the materialis considered enough to blend the new into the old. With CF, up to 40x may be required for full strength.
Now, with the size of bike frames/forks, this limits which positions where damages can be ideally repaired.
The challenge is mainly in the scarfing, if a really discrete repair is needed/desired.
With fibreglass, a scarf 10x the thickness of the materialis considered enough to blend the new into the old. With CF, up to 40x may be required for full strength.
Now, with the size of bike frames/forks, this limits which positions where damages can be ideally repaired.
Thread
Thread Starter
Forum
Replies
Last Post
MN Inferno
General Cycling Discussion
10
10-22-17 01:29 PM
