Originally Posted by abc
You could check the air pressure before going out and set the altimeter, and if updates were required while out you could carry a radio scanner to check. That could be going a bit over the top though

What I intend to do when I get it is walk from the beach to my place, so I know the exact altitude of my driveway. I can then reset it to the three metres or whatever it is for the start of each ride. Of course, that option may not be available on the Great Alpine Road in November, but we'll see.