I've done most of my Ultras in Inov-8s (Trailtalons 235/250 and Terraclaw 220) some 50, 60ks and a 50 miler, 85-90% of my runs are on trail and they… While the X-Talon G 235 does get two arrows, the ride is still pretty aggressive and firm thanks to the deep 8mm lugs. However, the shoe has ample protection and energy return underfoot from a Ywanpl2.