Roads of Sumba: Steep but rough

I thought the mountain roads of West Timor were the worst and steepest. I was wrong. Sumba now holds the record for crazy steep roads in bad condition. Only motorcycles, trucks, some 4x4 with large wheels, and mountainbikes can make it through here. The road on the photo follows a ridge to the north before dropping into the valley and making a 180 degree turn to the south, toward Ngonggi and the coast. The steeper sections (not on the photo) are often paved, but still too steep to cycle sometimes. I approximate the steepest road sections to 20+ percent (One meter up in every five meters forward). A black diamond ski slope is 25 percent and up.