Tire pressure on gravel roads

[hebe]

The harder more air in your tires, the more they slide..

So true. I take a right turn off my favourite bridleway onto another path. The builders have just gritted the junction with very big loose gritty pebbles and my poor bike struggles every time unless I remember to take it dead slow. Both of my bikes have 60psi at the moment, but I've been riding mainly on-road(ish).