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aluminum frame damage ok?(3 posts)

aluminum frame damage ok?Cutul
Jun 13, 2002 9:02 PM
I just picked up a cannondale r900 aluminum frame for cheap...the only problem is that it has two dents, one in the top tube (off center, middle) and one in the down tube (right side, middle). I knew the frame had the dents, but I did not see it prior to purchase. The previous owner claimed an LBS okay'd the frame.

Anyone have comments on how big a dent can be and still not significantly jeopardize the integrity of the frame? The larger of the two dents (top tube) is about one-ince in diameter and maybe a quarter-inch deep.
Take it to a Cannon Ball Dealer Immediately and Upgradejose_Tex_mex
Jun 13, 2002 9:29 PM
Cutul,
I hate to be the bearer of bad news but whomever told you that an LBS signed off on a dented frame is a liar. Anything he sold you should not be trusted.

A friend of mine was about to do the Cannondale return deal and asked if before he sent it in, they would let him cut it in half. I am not exagerating when I tell you the Al tubing looks to be about the width of paper.

Ofcourse, I know people who have ridden frames for years with minor dings in them. That doesn't make it safe. Remember, Al hardens over time. The strength in tubing comes from the shape of the tube. Take that away and things are not looking good.

You're lucky in that a) You said it was cheap and b) Cannondale has an upgrade/return program. I know of a dealer that pretty much let's you get a better model no matter what Cannon Ball you bring in. I would actually consider buying a dead cannon ball just to return for this purpose.

As for where the dents are, the down tube isn't too bad too hurt. Integrity wise, this tube is probably the least important of the frame which is why you see many bike without one. As for the top tube - that's another story. If that fails you are in big trouble. I had a chain stay shear in half one day and still limped 15 miles home at about 15mph.

Best of Luck
hard to tell w/o lookingcyclopathic
Jun 14, 2002 7:13 AM
it will also depend on where the dent is. It's probably safe, I would inspect bike after every ride. If you see small cracks replace, Cdale has a buy out crash replacement program. I wouldn't buy dented frame it voids warranty.