I have been a cyclist for a long time,for the first time I have had to renew wheel axles not once but twice, one a Shimano Ultegra front, it was bent, the other a Formula rear it was bent, neither would adjust to run freely without a tight spot, new axles and all is fine, now have I been lucky all these years and is it a common occurence, or are axles weaker than thy used to be?