Gemfan Flash 2540 Tri-Blade 2.5" Propeller (8 Pack — 4CW+4CCW)

The Gemfan Flash 2540 is a 2.5-inch tri-blade propeller engineered for micro FPV builds and high-kV 1104 to 1106 brushless motors. Featuring a high 4.0-inch pitch, this propeller delivers aggressive acceleration and a highly responsive throttle feel for freestyle and park-flyer drones. Moulded from durable polycarbonate, the Flash series balances rigidity with enough flex to survive light impacts.

Key features

• Steep 4.0-inch pitch for high top speed and sharp throttle response
• Shatter-resistant polycarbonate construction limits crash damage
• Supplied as a complete 8-pack (four CW, four CCW)
• Standard 1.5mm 3-hole T-mount fits most modern micro motors

Specifications

• Diameter: 2.5 inch
• Pitch: 4.0 inch
• Blades: 3
• Material: Polycarbonate (PC)
• Hub mounting: 1.5mm center hole (3-hole T-mount)
• Hub thickness: 5mm
• Weight: 0.98g (per propeller)

These propellers mount via a standard 1.5mm center shaft hole with twin M2 screw holes spaced at 5mm. They are best paired with lightweight 2.5-inch frames running 2S to 3S LiPo setups.