The rear triangle of the Evolve FS XX1 works with a glider system to respond particularly smooth. We really liked the jaw-dropping weight of the complete bike. With 9,5 kg, the ARC8 Evolve FS XX1 is a real lightweight. Especially in extremely steep terrain, this combination makes for smooth handling. The seating position is sporty. One thing shouldn't be underestimated: In the uphill, the ARC8 Evolve FS XX1 with its overall sporty orientation makes it really hard for on sporty excursions competitors to catch up. ARC8 gives 5 years warranty on the bike. Caution when selecting the size: the Carbon frame sizing runs big.