The Derale 17018 is an 18 inch heavy duty flex fan built for belt-driven cooling systems that run standard (clockwise) rotation. The stainless steel flex blades flatten out at higher engine speeds to reduce drag and noise while still moving strong airflow at idle and low speed. It uses a black hub and installs as a direct belt-driven mechanical fan.
Specifications:
- Type: Belt-driven heavy duty flex fan
- Diameter: 18 inches
- Blade material: Stainless steel
- Blade type: Flex (variable pitch)
- Rotation: Standard (clockwise, CW)
- Hub: Black
- Part number: 17018
FAQ
What rotation is the Derale 17018 fan?
It is built for standard (clockwise) rotation belt-drive systems.
Why use a flex fan?
The stainless steel flex blades flatten at higher rpm to cut drag and noise, while still pulling strong airflow at idle and low speed.
What size is the 17018 fan?
It is an 18 inch diameter fan with a black hub.

