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Master X-light frame cracked.(4 posts)

Master X-light frame cracked.Brian C.
Jul 24, 2001 9:35 AM
In the 75th mile of what surely would have been a century ride, the rear derailleur snapped off, taking a chunk of the wheel dropout with it. I was making a routine gear shift and - bang - it just snapped. My riding buddy saw it all happen and says the derailleur seemed to explode off the dropout. None of the rear wheel spokes was damaged and the derailleur seems to be okay, but the frame is scrap now.
This Colnago Master X-light had been on the road about three months and had performed flawlessly over 1,275 miles logged.
The LBS was stunned when he saw the damaged bike and got right on the phone to his supplier. He says a replacement should be here in a couple of weeks.
Any theories on what might have caused this? Dems da breaks?
re: Master X-light frame cracked.grzy mnky
Jul 24, 2001 10:33 AM
Most likely your rear der. went into the spokes due to a bent hanger, but this only happens in the largest or next to largest cog. The spokes won't even show a mark.

Other possibility is that your chain was starting to split open and it caught the rear der. cage and leg power snapped it off. A "green" stick will also do the same thing.

Your hanger could have been cracked/fatigued/defective.
re: Master X-light frame cracked.ferdie
Jul 25, 2001 4:27 AM
chain too short going into big-big combo
Theory: The chain did itBrian C.
Jul 25, 2001 8:31 AM
The LBS said it appears the chain got caught in the spokes somehow and that ripped the derailleur out, along with a piece of the dropout. The bike's still on warranty, so there shouldn't be any cost. But to salvage the frame, they have to send it back to Italy to have a new dropout brazed on. The frame probably won't be back till November or December. So, in the meantime, the LBS said he'll deck me out with a Classic.