" 42t, round one, is the middle on my triple.. " Same here. I used to have the same setup, except 13 - 21 Regina. It helped to be young and stronger! Then I didn't find the 39 too bad and liked the lower gears... then the 12 - 26...... then the 30 - 42 - 53 triple. Best of both worlds, with the 42 and fewer double shifts and the bailout gears. If I win the lottery maybe a Chorus 12 - 29 & 36 -52