As I've stated before, I like 58 mph on our roads, that said, if I drive 58 on I-5, my speed is not as fast as some trucks and not as slow as others. What it is, is my happy spot, I'm comfortable, I arrive when I get there and I don't anger many.
On two lane country roads, slow and sure and always looking for pull outs. In the mid-west there are a lot of two lane roads and on our way to and from Kentucky, I never had one driver honk, show their IQ or pull any cut of when passing. Nice folks back there. Here in Calif., you usually get all those gestures and more. We've seen some interesting stuff at pullouts, strange what flies out of a moving vehicle.
Go your speed and pull over to let the backup pass.