just over a year ago I bought a cannondale quick carbon bike. It cost me 1600 ,I was keen on getting a light bike so I could move it with ease, this bike has not done any more than 1500 miles and has not been subject to any rough treatment. I am only 9 stone . Recently I found I could not select gears without the chain coming off, I took it to my local repair man who informed me that the front cog gear changer had broken where it was screwed into the frame and as a result the Carbon fiber frame was cracked. He believed it was a design fault. I returned the bike to cannondale who said after a year of use it was my fault and has refused to sort this out. This was a expensive bike which has has little use and has not been abused . My Claude butler cost half as much and has done 4 times the miles with no problems. Has any one else experienced this problem with a cannondale quick sl ladies bike. Please.