I’ve used 1.03 for years, but started rotating through 1.03, 1.09 and 1.125 diameter handles, changing almost every day, last year. Changing the diameter on a regular basis seemed to help elbow issues. Or maybe I just pull like a G1 skier now, which also helps elbows.
After cycling through the above diameters (I have 3 of the 1.03 handles), I am pretty sure that the 1.06 would be perfect for me, as the 1.03 feels a little small now. I’d order one, but I have five perfectly good handles in adjacent diameters I feel I should wear out first.
All of my handles are 13” bent.