When is riding in the rain the most dangerous?

Riding in the rain is particularly dangerous when it first starts to rain due to the presence of oil and other substances that have accumulated on the road surface. During dry weather, these materials gradually build up and create a slick layer. When the rain begins, it can mix with these substances, creating very slippery conditions. This initial period can lead to reduced traction for motorcycles, making it challenging for riders to maintain control.

As the rain continues, while visibility may decrease and road conditions can still be hazardous, the initial dangers from oil slicks begin to lessen as the water washes these substances away. Therefore, the first moments of rainfall present the greatest risk for motorcyclists, as they must be especially cautious during this time to avoid slipping or losing control.