going and stopping
Hi juan. what kind of bike is it? a bit more info necessary for a detailed reply.
if you’ve changed the road levers for V-brake ones then you could end up having less power, not more – V-brakes pull more cable so the force at the rim is lower
as for tyres, depends what they are! 2.5bar (37psi) isn’t much though. i run 25mm tyres pumped up to 100psi…