A 32 max cassette cog should be fine more my purposes. The bike currently has a Shimano 50-34 compact double crankset, but I am switching it to a 105 triple with 52-39-30 chainrings. I also picked up an Ultegra triple FD. I may be just fine with the existing 12-28 cassette but would like to know my options if I desire more low-end gearing. This is a touring bike (Bob Jackson) that I am primarily using for commuting. I have another touring bike with a Sugino triple crankset and 11-34 cassette, and it's my preferred bike for loaded touring.