For what it's worth, I had the chance to ride my old tyre setup for one short trail over the weekend on a borrowed bike while otherwise riding my bike for most of the ride. The borrowed bike had an admittedly quite worn Big Betty in the rear and a Magic Mary in the front, both diagonal trail, soft, set to my old pressures of 1,4 bar, and the grip was nowhere. My bike is equipped with radial US Magic Mary in the front and a soft Romy in the rear and the difference in very dry, loose conditions was...