Horses for courses. Tyres have become so terrain and bike specific now. After 25 years of riding and racing on just about everything out there, for general trail riding (which I think fits the bill of all round grip, weight and rolling resistance) I've landed on: Rear: Maxxis Aggressor 2,5WT EXO Front: Maxxis DHR2 2.6 EXO These are on 34mm wide rims, and I ride a steel hardtail with an Ohlins36 140mm fork. I've spent days doing back to back runs with various tyre combos, and I've found that generally what one loses in perceived rolling speed is more than offset in improved climbing traction, braking and steering control. All of which equals more confidence and thus more speed. The only time I would give that up, would be for something like a 100 Miler or a Trans Karoo type event, where hours and hours of consistent rolly pedalling is key. There I have used Michelin Wild Racer, Vredestein Spotted Cat and Schwalbe Racing Ralph with success. But then also for those events, I'm swapping out fork, stem, seatpost, chainring and lengthening my chianstays.