Hi,

It had Bontrager carbon forks and 23mm Bontrager T1 tyres.

They should be run about 100 psi for average weight with the
rear somewhat higher than the front, due to weight distribution.

Going to 28mm drops pressures to about 70 psi and gives
more grip due to a bigger contact patch and a smoother
ride at the cost of some added tyre weight - which might
make the front feel a little more stable, not sure though.

rgds, sreten.