The fork is a 7 year old Alpha Q GS30 that I bought from a builder raw. I would hit it pretty frequently with 303 for UV protection but can't say the underside of the crown got hit that often. I'm not sure if that contributed to this kind of deterioration of the carbon. There are two small holes and you can see the fork mounting bolt on the front brake.
The only good things about this is I have a brand new GS30 that is painted as a spare and the other is that with such a windy day we came back at a pretty fast pace hitting speeds up to 61 km and the fork did not fail!
Words of wisdom? Clean your bike often and inspect everything closely. Also the underside of this crown was fine last time I had a look at it a few weeks ago.
Here is a link to the ride:
http://app.strava.com/activities/90038993" onclick="window.open(this.href);return false;
I guess my being cocky in my title gave me the next day flat. Karma.
good thing you checked. count your lucky stars.
- Parlee Altum + DA9150 + Enve SES 4.5 carbon hubs
- Parlee ESX + DA9150 + THM SRM PM + Enve SES 6.7 CK hubs
- Independent Fabrication Ti FLW + DA9100 + Enve 3.4 CK hubs
to me the pic looks like the underside of just about every carbon fork that gets ridden a lot.
the amount of material around that area on an Alpha Q in that area is very thick. 10mm or more. Are you saying the hole goes through the wall?
viewtopic.php?f=10&t=108931" onclick="window.open(this.href);return false;"
It has the H2 geo......one step racier than a hybrid bike
progetto wrote:( I'd patch it up with a couple layers of cloth and resin and call it good. )
Then put that sucker on ebay, no one will ever know.
No, but I'd happily ride it.
Seriously, has anyone heard of a fork breaking in that location? Looks like erosion rather than a structural crack.
First, I'd try to pull the blades apart... and if that doesn't produce any strange sounds then patch it up. That's how they'd fix it if you sent it somewhere anyway.
Juanmoretime wrote:Nick, that is correct. I cac see the front brake bolt thru one of the holes. I've never had a rock wedge in it either.
The photo doesn't do it justice then. Just looks delaminated. Cosmetic.
Juanmoretime wrote:I've never had a rock wedge in it either.
...an actual hole doesn't just happen from carbon delamination. Even if a rock never got wedged in there u could have hit a rock that got shot onto the underside or a nail or other sharp object. Carbon doesn't just disintegrate and fade away leaving a hole that appears like a puncture wound. EM3
Both UV radiation and moisture have adverse effects on the mechanical properties of the polymeric epoxy matrix, while the carbon fibers are not affected significantly by either environment. The polymer matrix in a fiber-reinforced composite serves to transfer the loads to the reinforcing fibers and provide shear strength. Its not the non-coated carbon but the non-coated epoxy that leads to reduced damage tolerance and lack of long-term durability. But really seven years is good, consider the flat a blessing.
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