Road Cycling - Should I be concern on this...

I was cleaning my bike today and notice that theres alittle dent caused by the wire from the left shifter near the bottom bracket. Now the dent isnt that deep but deep enough to raise concern. My bike is aluminum and I think that part of the bike should be alittle tougher than the rest of the bike because its near the BB. Now my question is, should I be concern? Is this typical on all bikes and how can i prevent/fix this.

Thanks

http://upload.serverseed.com/pictars4/bottomb.JPG


http://upload.serverseed.com/pictars4/bottomb1.JPG

your bike is a 93...dude, i would not worry about it...not to say you are riding a crummy bike, id just say it is normal wear and tear and definitely not worry about it...

Nothing to worry about. Cannondale sands the welds on their frames by hand and it doesn't look like they sanded that one quite enough so the cable finished the job.

Best thing to do if you're concerned is go to a local bike shop and have them take a look at it. Better to be safe than sorry.

You should be able to reposition the grooved piece that serves as a guide to the cable around the BB. Unscrew it and slide it back toward the droppouts until the cable no longer touches the frame (this part usually has a two/three mm play. It looks to me also it is not entirely in straight line for the rear derailleur cable (good pics, what kind of camera do you use ?)
I noticed this on my bike also. I don't think it is good to let your front derailleur cable have any kind of friction with the frame.
If this does not work, get a piece of derailleur cable housing (thin type) and get the cable through it along the line where the friction occures.

I dont think I can move that mount back because of the screw position, but I will probably get a housing or a longer mount. Im just afraid that after a while there will be a hole there and weaken the whole bb and chainstay.

My camera isnt that good, its a Sony P31 2.0 MP camera.

If you do decide to leave it, fill the gap with wax. This will lube the ecable and may prevent more wear. Wax will not attract dirt like chain oil or grease.

I have the same year bike... same problem..

Ok, heres what I did. I unscrew that bottom piece and I made the screw hole on the plastic longer. I melt it with a screwdriver + lighter and now its long enough for it to slide slightly further back and JUST miss hitting the frame. I suggest you try that Jim. :)

You sure that guide won't slide back, even a mm or two? It doesn't have to cover the grooved area, just has to make the cable "exit" a scoche further back. If all else fails, I'd leave a very thin film of grease on that groove, just to smoove out the cable travel.

Darn nice pics! It's not really about the MP's; for stuff like this, it's whether you can focus close-up.

The bottom bracket shell is thicker than the tubing that's welded to it, so your chance of breaking your frame in this area is extremely remote. However, if it did break, you certainly would have a case for warranty replacement as the cable guide was original factory spec and the company's product engineers
should have made sure that gear cables would clear the frame.

A couple of the other posts in this thread have good, simple solutions to solve your cable clearance problem without major expense and trouble.

By the way, great photo!