I have nine speed with triple chainrings on my tandem. The large ring is an Origin with 48 teeth, the middle ring is a Shimano ten speed with 39 teeth and the small ring has 26 teeth with no ramps and pins (don't know the brand.) The crank is the older Shimano Ultegra and shifters are Ultegra 9 speed. This combination shifts great and I repeated this setup when I had the bike overhauled this winter. I made the switch from the usual 52/42/30 to gear the crank lower an use a tighter cassette on the back.