Er, am confused, isn't the 10 speed 10 on the back and the 11 speed 11 on the back? And about the mysterious cassette on the back of your triple bike, don't you ever renew the cassette?Aside from my fixed (48/18) , I have little idea or interest what gears are on my bikes. I have a 9-speed triple but no idea what the chainrings or cassette is. I have 10-speed and 11-speed bikes, each with 50/34 rings on the front but I can’t remember and don’t care what’s on the back. I just ride!