The Derale 17617 is a 17 inch heavy duty flex fan built for belt-driven cooling systems that run reverse (counterclockwise) rotation. The stainless steel flex blades flatten out at higher engine speeds to reduce drag and noise while still moving plenty of air at idle and low speed. It uses a black hub and is a direct belt-driven mechanical fan.
Specifications:
- Type: Belt-driven heavy duty flex fan
- Diameter: 17 inches
- Blade material: Stainless steel
- Blade type: Flex (variable pitch)
- Rotation: Reverse (counterclockwise, CCW)
- Hub: Black
- Part number: 17617
FAQ
What rotation is the Derale 17617 fan?
It is built for reverse (counterclockwise) 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 17617 fan?
It is a 17 inch diameter fan with a black hub.

