I have seen people talk about the spread of gear inches they have available such as from 17-110 or something. My question is this. I have heard that you should not ever put your bike into say the highest or lowest gear because of chain angle. So, when the chain is on a given ring in the front, how many sprockets can you safely go to on the cassette. I have a triple in front and a 7 sp. cassette, if I am on the smallest chainring, can I safely use the largest five sprokets for instance? Or the largest four? If this is the case, the biggest and smallest gear inches available for use would be different than the maximum and minimum indicated by the cassette and chainrings right? And the number of gears is reduced as well.