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I did a really STUPID thing(20 posts)

I did a really STUPID thingPaulCL
May 25, 2003 5:30 PM
Help. Second ride on my new CF Aegis frame. First the ride...65 miles, 19.3mph avg, smooth, stiff, awesome frame. I love it. Versus my old Ti frame, much smoother, less fatigue after the ride. Nothing like riding in an area completely devoid of even a bump, much less a hill.

The bad thing: I think my new cables stretched a little and I overshifted off the small chainring. Result: Chain drop. Two gauges in the carbon fiber on the chain stay near the bottom bracket. The 'gauges' go through the gelcoat finish. It's definitely not serious enough to threaten the integrity of the frame, but it looks horrible. Here's the question: Is there someway I an repair this myself..a CF putty or paint it with black nailpolish? Or do I not worry about it? Should I go back to the LBS that I bought it from last week, with my tail between my legs??

This just makes me sick to my stomach. Brand new, beautiful black weave CF frame and I scrape it on my second ride. I put a couple of pieces of black tape over the areas becuase it just hurts to see it.

Thanks. paul
re: I did a really STUPID thingLC
May 25, 2003 5:34 PM
Black fingernail polish to seal it up and then put a couple layers of black tape over it for when it happens next time.
re: I did a really STUPID thingRusty Coggs
May 25, 2003 5:48 PM
There does not need to be a next time if the derailer is adjusted right....Trek uses a thin stainless sheild held to the stay with double stivky tape.
ThanksPaulCL
May 25, 2003 5:58 PM
I'll use black nailpolish or black car touch up paint. Do you think they sell some aftermarket product like Trek uses?? Preferably in black. Or do you think several layers of black electrical tape will be OK? Paul
Thanksgtx
May 25, 2003 6:09 PM
Who adjusted the front der? It shouldn't do that if set up properly. If the shop set it up they are somewhat liable. I'd ask Aegis about a shield and any touch up.
There is a company ...Atombomber
May 25, 2003 7:32 PM
which makes adhesive backed carbon pads to protect against cable and housing rub. I will need to do a bit of a search to find the name though. Its been a while since I saw it in a order catalog.
There is a company ...Atombomber
May 25, 2003 7:38 PM
http://www.the-products.com/mtb/main/chainptr.gif

You might be able to cut this to the desired shape.
There is a company ...Atombomber
May 25, 2003 7:41 PM
http://www.sjscycles.com/store/item1750.htm

another option
Lizard skins makes some (nm)nazgul
May 25, 2003 7:41 PM
Lizard skins makes some (nm)Atombomber
May 25, 2003 8:47 PM
http://www.lizardskins.com/products/carbonpatches.html
It's the shop's fault... improperly adjustedbenja15
May 25, 2003 7:56 PM
There is a limit skrew which when set properly will keep the chain from falling off into the frame... it is likely that this is set improperly, but not certain. It is possible that the chain could out of chance still pop off even when it is adjusted properly if you shifted under a lot of force and depending on what gears you were in and if there was a bump in the road when you shifted.

i would take it to the shop and show it to them
Thanks everyone - you put my mind at easePaulCL
May 26, 2003 6:20 AM
I know now that I didn't permanently mess up my new frame. I'm new to CF. Thanks for the suggestions.

In all fairness to the shop, I was warned about the cable stretch over the first few rides. I was told to take it easy - I didn't. I've been riding enough years to know when I screwed up. That said, I'm buying some Lizard skins - though I hate having their logo on it. Maybe Atombombers' suggestion from Europe.

Thanks. Paul
More on cable stretchKEN2
May 26, 2003 9:12 AM
If the derailleur stop screws were set correctly, cable stretch WOULD NOT cause the chain to drop off. Rather, if the front derailleur cable were to stretch you might notice that the chain doesn't shift reliably onto the large chainring.
yupgtx
May 26, 2003 1:03 PM
The der wasn't set up properly--either the limits or the angle was off. Also, there is no such thing as "cable stretch"--it's the housing seating better and compressing a bit.
OK, OKPaulCL
May 26, 2003 2:41 PM
I go back to the LBS and pitch a fit....maybe I can get the lizard skins for free. At very least, he'll re-adjust the front derailliuer.
BINGO (nm)joekm
May 27, 2003 4:55 AM
A question though...Brooks
May 27, 2003 9:29 AM
How do you get "gouges" (not gauges) when the chain drops off the small chain ring? At that point the chain stops moving 'cause there is no force being applied through the chain and the rear freehub is in coast mode. I guess, without seeing any pictures, that the gouges are quite small and only rubbed the clearcoat a bit. Cosmetic only and not structural.
TruePaulCL
May 27, 2003 11:05 AM
That is the end result...scratches, not gouges. I must have been having a really bad spelling day.

I emailed the folks at Aegis to give me a suggestion. The reply email suggested poking at the 'damage' spots to see if they are soft. They were not. You are right - once the chain is off the chainring, there is no tension to actually chew into the frame.

I bought some black touch up paint and lizard skins. I've got some work to do this night. Also, I found out that EVERY Aegis frame is shipped with some sort of "anti chain-suck" device which my LBS did not install. He's getting a call from me today...

Paul
Damon Rinard says...Akirasho
May 26, 2003 12:50 AM
http://www.sheldonbrown.com/rinard/carbonqa.htm

Take a look at some of the info here... it might be applicable to your situation.

Be the bike.
re: I did a really STUPID thingJuanmoretime
May 26, 2003 3:37 AM
Paul, Thomasini sells a faux pas carbonfiber chain stay protector that would hide it very well. Look in a Colorado Cyclist catalog or check their website. I also used to own a Specialized Allez carbon fiber that had a couple of chips in it. I used clear epoxy to patch it, I figured that was the adhesive that held it together anyway. That was about eight years ago and the person that I sold that frame to is still ridng it today.