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DaveLeeNC First congrats on all your yearly mileage, that's great. Second, and just as importantly, at this point in your life you shouldn't need an excuse to buy a new bike. Just go and do it.
I too have a torn right rotator cuff. Hoisting my bikes above my shoulders can be painful. Instead of doing a single-motion lift, I use my left arm to get one half of the bike up in the hook, then I use the same arm to lift the other half up in the hook. It is a bit cumbersome, but it works.
Good luck with your new bike!