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Aluminum Top Tube Dent and paint crack? Help please

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Aluminum Top Tube Dent and paint crack? Help please

Old 04-21-10, 06:21 PM
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Aluminum Top Tube Dent and paint crack? Help please

I'm an idiot and somehow got bucked off my bike today and dented my top tube. It was in the middle of the street so I'm not quite sure how the dent happened, as it is too far down to be from the handlebars swinging and smacking into it. Not quite sure as to where the bike landed, whether it was on the head tube-ish or front end or just slammed down on the side, but it was far enough from the curb that i'm fairly certain the tube didnt smack into it. I just remember getting up off my stomach as the bike lay on the back of my legs.

I'm wondering if this dent ruins any of the structual integrity and/or if the crack at the top is a crack in the tubing or just the finishing. Or wondering if its possible for sheer impact to buckle a tube like that making the dent stress related and not impact related. if that makes sense...

I'd love any and all advice. I've only had steel frames prior to this bike, and haven't been riding this too long so my knowledge of aluminum tubing is quite limited.

Thanks in advance.
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Old 04-21-10, 06:35 PM
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Is you life and medical insurance paid up? It probably will not break but I would not ride it any more. Find a frame and use your parts on it. Roger
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Old 04-21-10, 06:41 PM
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That frame is dead. You'll fold it while riding (sooner rather than later), and the result is going to hurt, or worse. Based on the market for the B.Pista, I would have expected a heavy gauge (robust) frame used here, but it looks like another one of the pop-can frames that have become far too common. Any one else have specific experience re: the frame build?
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Old 04-21-10, 08:22 PM
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How heavy do you use it? If you just use it as an around-towner it is probably alright. I wouldn't ask it to be a stunter or heavy trail bike.
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Old 04-21-10, 08:35 PM
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I dont see anything wrong w/it. Scratch the paint to the bare metal to be sure the tubing it is not cracked under it 1st. If not, it is kind'a obvious that you should be ok. There is a putty used for cars that can be used over aluminum, fix it with that, sand it well, put some black paint and a sticker over it and nobody will notice

I dont agree with the other guys, as long the tubing is not cracked it should be ok, but it is your call.
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Old 04-21-10, 09:06 PM
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that frame is fine. please. it is a dent. big woop.

is it weaker than it was? sure. is it going to fold up on you? no.

high end steel bikes with thin tubing are super proned to dents, but people aren't throwing their $1000 frameset away because of a dent.

edit: im 99.9% sure the cracking is the finish. ie: no biggie.
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Old 04-21-10, 09:32 PM
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The worst thing about this dent is the mental aspect. It's in such a visible place, and looks like crap. Ignore the "you'll-die-tomorrow" crowd and try to enjoy the bike. I suggest a bit of body filler and some kind of camouflage, but that's up to you.

You should probably keep an eye on it for signs of cracking, but until you see any don't sweat a sudden catastrophic collapse since most of the stress on top tubes is compression, and concentrated up near the front end.
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Old 04-21-10, 09:59 PM
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^^ nothing a top tube protector can't fix:
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Old 04-21-10, 10:17 PM
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thanks guys. hopefully its not wrecked. plan on taking it into my local bike shop to check it out. pretty bummed still cause it was a pretty ass frame and reeeaaallly new. thanks for the replies!!
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Old 04-21-10, 10:23 PM
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it's wrecked, if it was steel i would ride it, but since it is AL the frame is about one good pothole away from cracking.
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