My bike is a Cannondale Caad 10 105 2013 model. Yesterday I noticed a more present than usual 'clicking' noise coming from my rearcogs. After posting here later in the afternoon I learned this was due to cross chaining. Today I took my bike out again and noticed the cross chaining noise even more than usual, possibly just because I was paying more attention. I started to practice changing the gears up and substituting higher gears on the smaller chainring with mid range gears on the larger chanring. I will be taking the bike tomorrow to get looked at and see if the amount of cross chaining occurring is normal or if it needs to be adjusted. Remember back to the cross chaining article I read, this process can put some wear'n'tear on the chainrings affected. I have attached some pictures of the larger and smaller chainrings of my 2 chainring set. As you can see in the larger chainring there is in fact a decent amount of variation between the shapes and sizes of each tooth. In the smaller chainring each tooth is almost exactly the same. I've only taked the bike out about ten times since I bought it, and have less than 100 miles logged into it. Its true the first 8 rides I was not paying much attention to the cross chaining noise, but each ride was less than 10 miles, and the noise didn't happen too often. Is it really possible that cross chaining can cause this much damage to my larger chainring this quickly, or is the variation in size among the teeth normal?