Counting teeth has long been the means of estimating age of cattle and horses, but have you ever counted the teeth on your bicycle's group set or cranks? I hadn't, before today! I was reading a book about getting faster on a bike and one of the things that was described were the common gear options.  I learned that the most common option for a ten speed cassette is sprockets ranging from 11 teeth to 23 teeth which is simply called an 11-23 set while a 12-27 set is generally considered a better bet for tough climbs. When I did the counting, mine turned out to be a 12-27 set, which in essence means I suck a whole lot more at climbing than I thought :(  It also means that I might be losing out on some higher-end speeds. Oh, well. If I need to get any faster, I must simply cut back on junk food and lose some more weight and bike more.  Bah!