The XT946 Ice Soft tyres are specially designed for X Treme, which is an extreme endurance race that requires multiple laps and necessitates slower, more precise driving.
These are not tyres for speed racing, but for hard, rugged, wet, and slippery roads, where acceleration and balance are more important than speed.
They perform perfectly on the road, but the soft and deep studs are designed for slower work and extreme terrain.