At the end of last year's riding season, I bought this MEC Attack road bike...


The frame and fork are carbon fiber...


This is the first and only carbon fiber bike to come my way. I did take it out for a short and bloody cold ride, before putting it away for the winter (storing inside to avoid freezing but not sure if I need to do so - anyone?)...


What a nice ride quality and I immediately decided the bike would be a keeper (that is saying something for me). That said, while doing some research about the bike (think it is of 2012 vintage), I read that carbon fiber frame/fork sets have a life span of about ten years. The bike appears to be in excellent little ridden condition. None the less, should I be worried? Thanks.

I'm riding carbon fiber frames and forks from as old as the early 90's without worry. I keep an eye on it like any other bike.

5o+ years ago as a young engineer I did non destructive testing on metal and carbon fiber equipment and I know these days "professional" carbon fiber bike frame repair shops assess damage such as voids/delaminations/etc. on frames. You might check them out if you have concerns. My only carbon frame is a 1999 Trek 5500 and I am not worried but am easy on frames these days.

Carbon frames that had clear finishes are more susceptible to trouble.
the UV will eventually attack the resin holding the fibers in place

glued, lugged carbon frames have those potential adhesive failures.

I think very much how the bike was treated, mistreated.

1987 Kestrel with carbon fork.. Had it since it came out of the mold… Did a repaint last year… Rides like new…

25 yo frame with a lot of miles = no issues. The 1" full carbon fork is 'old' too, but was installed only 12 years ago when I went threadless. Calfee had a 25 year warranty on frames - and I just passed that.

I am not a materials scientist, but my understanding of carbon fiber is that as long as you keep the stress/strain on it below a certain threshold, it has essentially infinite fatigue life. To translate: as long as you don't crash and crack the frame, you should be able to ride it a long, long time.

I don't think there is any data that clear or pointless CF has any trouble.

Craig Calfee told me (in the late '90s) that a 'nude' cf frame was susceptible to the UV concerns. That a well painted frame was immune to UV. And that clearcoat they applied at the factory was somewhere in between, tending much much closer to paint. I chose paint with clearcoat at BB and chainstays. His experienced opinion was based on about 15 years exclusively building high-end cf bikes; and before that building CF small boats&parts and kayaks.

1" threaded, Campy 9 triple - just as the world was shifting to 1 1/8" threadless with 10 speed in 2000. It got upgraded over time + factory repainted once

Are the epoxies of today UV resistant? Seems likely, but IDK. Probably not Phoenix, AZ UV proof but Seattle is perhaps gentler. So many variables.

I also chose to paint the top portion of a cf fork on another build.



Nude cf with weaved top layer was a 'thing' for a while with weight-weenies and carbonaholics, bitd. maybe still is?

Calfee sells nude frames.

They sell 'custom for the customers' frames.

see my build tag = "hta 73° - see Craig"
When I requested the slackened HTA in conjunction with a few more millimeters on the chainstays, he replied "we don't build touring bikes at Calfee.". I dropped the chainstay request. . They modified that opinion as the market changed.

Or they stopped using UV sensitive glues decades ago.

Someone needs to post a picture of UV damaged nude CF

Frame warranty probably not 25 years for Nude, as it was for painted.

It’s circular wear to carbon fibre steerer tubes at the top headset bearing I’d keep checking for, irrespective of the age of the frame.

Nope.

https://calfeedesign.com/warranty/

I had a nude Luna with a nude Alpha fork. Not remotely custom.

Parlee also sold them that way.

Interesting.
Were you a weight weenie?

True this.
Unless there has been impact related damage, which should be visible.

Randyjawa - you should be good to go.

Thanks for the input all and I feel pretty good about riding the MEC. That said, the cf seat post looks like this. Does that suggest any form of structural failure..?


Also, though a slightly different concern. I live in a land of cold winter temperatures. Two months ago it was minus 34 degrees Celcius. I keep the MEC inside and warm. Do freezing temperatures impact the carbon fiber integrity? Thanks again.

Unqualified to answer on the sub freezing temp and CF question but in general wouldn’t worry about a definitive lifespan on a CF frame. I would highly recommend, however, inspecting the fork steerer and crown. That is probably the highest likelihood failure point. Look for stuff that looks like your very unhappy seat post. I am not familiar with that brand but my 30 year old and 15 year old Colnago CF frames get regular use.

I'm building up my first carbon monocoque right now, an '08 Trek OCLV 5.1. I fanatically inspected the frame and fork for any damage, looks OK. Should be interesting to see how it rides compared to all my ancient kit.

No. I did like the way it looked.

1989 Kestrel. Still riding it.

Still riding a twenty-seven year old Calfee Tetra Pro. No issues. Not concerned. As was said above, as with any bike, just keep an eye on everything.

Come to think of it, even my BMC is twenty years old now…

And remember, ..... not all nudes are the same!!!

you may have to zoom in on the image - lugs with stiffeners especially






Parlee close-up. Was it called 'satin finish'? Now that's a tight tire clearance.

another nude finish. I think,