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Is a frame with a small crack unrideable???(6 posts)

Is a frame with a small crack unrideable???SDR
Jun 17, 2003 1:31 PM
I am looking for some advice on a cracked Bianchi Alloro aluminum frame. Last night I heard a horrible metal on metal sound after hitting a small dip in the road. On inspection, I found a half inch crack at the seat tube bottom bracket junction, plus what looks like corrosion around one of the water bottle mount bolts (I didn't think this was possible on an aluminum frame). Anyway, the crack doesn't look too bad, and since I'm a grad student and don't have the funds for a new frame, I was wondering how dangerous it would be to ride a frame in this condition. Or should I start putting more road miles on the MTB.
Ride it how? If you lived in a small Caribbean country, youbill
Jun 17, 2003 1:47 PM
would ride this bike into town on bad roads at 12 mph until you willed it to your children. If you are racing it or doing descents at 45 mph or simply value the orthodontic work that your parents paid so much for, you wouldn't have ridden it home.
In short: Hell %@#ing Yes It's Unrideable!!sidley
Jun 17, 2003 1:55 PM
I learned what that noise was only after My bianchi XLEV2 snapped in half. I was going about 5mph so I was fine but imagine if your frame completely snaps while your rounding a turn or your standing up - you would be screwed.

The good news is Bianchi is pretty good about replacing their frames They replaced mine without any delay but I was still within the warranty. If you can, take it to wherever you purchased it from with a receipt. Otherwise talk to a good lbs that deals bianchis - they might be willing to help you out.

Your frame is just waiting to burst, when it does the rider would likely be tossed with a jagged piece of aluminum jutting out.
re: Is a frame with a small crack unrideable???Sle
Jun 17, 2003 2:25 PM
If the crack is small and the bike is out of warranty, you could try to go to a welding shop. Cannot tell how long it will last. As for the rust, most of the time (especially on thin wall) it is impossible to bolt something directly in the aluminium. It is probably a metal insert in the aluminium frame so the thread is strong enough.
Have you picked out a coffin for it yet?LC
Jun 17, 2003 2:26 PM
I can hear the siren of the bicycle emergency response team coming down the street to pick up your frame right now! They will take it to the bicyle graveyard and give it a proper burial.

You are very lucky that you saw the crack. Most people are not so lucky on a aluminum frame, as it usually just falls apart before they know what happened. This frame has seen it's last mile, so don't even think about riding it at all.
Bury it at sea....(strip the usable parts first!)...bicyclerepairman
Jun 17, 2003 3:12 PM
at low tide at a spot you'll remember...return in 2 or 3 months and voila! Art that can be hung on the wall, or from the ceiling as a mobile. It will embody the Japanese aesthetic idea of wabi sabi. Of course, your feng-shui may vary.