I've been riding for about 15 years now and in the last few years I have had to change a few items on the bike to accomodate my changing body.My Items have been
More upright position, not much but on the Mountain bike this was easily done by fitting riser bars;
I have always used a Flite Titanium saddle, but this became uncomfortable about 2 years ago so went to a wider saddle with the Pelvic bone cutout. This caused chaffing at the groin, so have now reverted to a new Flite titanium, with the cutout and just a little gel insert. This is comfy, but on the Tandem, where I am even more upright, have gone to a wider Selle Italia Transam--Womans version. This is comfortable.
I am no longer comfortable with any tightness around the waist, so have changed to bib shorts.
Still on shorts-The normal chamois type liner has been changed to the Roadie type of thick foam for the longer rides
The fingerless gloves have been changed to a full length finger glove for all round use.This is due to not being able to take the branch whips across the fingers that I used to be able to.
What changes have the rest of you had to make to accomodate your advancing years?