The ITRS is an objective way to assess trails and routes from a biker’s perspective. The ITRS informs the bikers about the requirements to safely master the various challenges of a trail or an entire route. For this purpose, four aspects are evaluated in the ITRS, which in their interaction reflect the fascination and complexity of mountain biking: Technical Difficulty, Endurance, Exposure and Wilderness.

ITRS Nutshell – English
ITRS Nutshell Multilingual