Good news. I just installed a Sunrace 11x36 , 10 speed cassette and new chain on my friends bike. Tiagra 4700 GS cage. Didn't even have to adjust the "B" screw. Crankset is a 34/50, so that puts the capacity right at 41 T. He is an older rider (82) and the bike came with a 11x32, he needed some lower gears to climb with me (72). KB