https://www.openstreetmap.org/way/40776412/history

mtb:scale=1?

https://wiki.openstreetmap.org/wiki/Key:mtb:scale

Smaller obstacles like roots and small stones. Erosion damage may increase difficulty. Soil may be loose in places. Tight turns, but no hairpin turns. Riding requires care and attention, but no special skill. Obstacles can be ridden over.

    Surface: loose surface possible, small roots and stones
    Obstacles: small obstacles, water gutter, erosion damage
    Riding skills: basic riding skills required, obstacles can be passed over

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Czy mtb:scale=0 nie pasuje bardziej?

Gravel or packed earth. No particular difficulties. Mostly forest and meadow paths (highway=path). Sections with steps, rocks, or roots are not expected. Wide curves, easy to moderate slope. No special skills are needed to ride this.

    Surface: solid and handy
    Obstacles: no obstacles
    Gradient: mild to moderate
    Bends: wide
    Riding skills: no special riding skills required

For very easy ways you can use mtb:scale=0- for harder ones (but not yet mtb:scale=1) mtb:scale=0+ 