GEPRC GR2207.5

What it pulls

GEPRC’s own bench test, one line per prop. Drag across the chart to move the throttle; the model above follows.

What you get

• A KV for each use

  GEPRC sells it in 1700KV for 6S freestyle, 1920KV for 6S racing, 2400KV for 4S freestyle and 2750KV for 4S racing.

  Source: GEPRC product page, GEPRC details image

• 2.3 kg at 21 V (2750KV)

  The 2750KV pulled 2,270 g at full throttle on a Gemfan 5 × 4 × 3 at 21 V, drawing 45.3 A; at 16 V it pulled 2,008 g on a Gemfan 6 × 4.5.

  Source: GEPRC details image

• One-piece 7075-T6 rotor

  An integrated rotor in 7075-T6 aluminium with N52H magnets; GEPRC claims 30% more power and 10% more efficiency than a conventional 22-size motor.

  Source: GEPRC details image

• 260 °C winding

  The winding is rated to 260 °C, and the bearings are Japanese ISC, as GEPRC gives them.

  Source: GEPRC details image

What to pair it with

Our reading of GEPRC’s numbers, so your build matches what the motor was tested with.

ESC

On GEPRC’s bench the 2750KV drew up to 45.9 A at full throttle (Gemfan 6 × 4.5 at 16 V) and 45.3 A on a Gemfan 5 × 4 × 3 at 21 V. GEPRC gives no ESC rating. (GEPRC details image)

Props

5-inch: GEPRC’s tables use Gemfan 5 × 4 × 3, 5 × 4.5 × 3 bullnose and 5 × 5.1 × 3 tri-blades, and a Gemfan 6 × 4.5. (GEPRC details image)

Battery

6S for the 1700KV and 1920KV, 4S for the 2400KV and 2750KV. (GEPRC details image)

Frame

Four M3 holes on a 16 × 16 mm pattern (opposite holes 16 mm apart), and a 5 mm shaft. (GEPRC details image)

Where to buy

• GEPRCthe maker’s store; $14.34, down from $23.90 (clearance), for any KV, all listed as out of stock
  $14.34seen Oct 19, 2026
  Visit

Plain links, not affiliate links. Prices change; the store’s page has the current one.

Full specs

Bench data

Redrawn from GEPRC’s test reports. Thrust is static pull on a bench, more than you get in flight. Power is volts × amps; efficiency is thrust divided by power.

Inside the motor

A brushless outrunner: the coils stand still in the middle and the magnets spin around them. From the top down:

• Bell. 7075-T6 aluminium, an integrated one-piece rotor, φ27.7 mm, titanium-grey with gold-anodised edges on its four-spoke top. (GEPRC details image, GEPRC product photo)
• Stator. 22 × 7.5 mm, wound with wire rated to 260 °C. (GEPRC product page, GEPRC details image)
• Magnets. N52H. (GEPRC details image)
• Bearings. ISC (Japan), as GEPRC gives them. (GEPRC details image)
• Base. Four M3 holes, opposite holes 16 mm apart. (GEPRC details image)

How fast it spins

KV is the motor’s no-load speed per volt. With nothing on the shaft, the 1700KV version reaches about these speeds; a prop loads the motor and brings it down, typically to around 70–75% of these figures at full throttle.

A 14-pole rotor has 7 pole pairs, so every turn of the shaft is 7 electrical cycles, and a six-step ESC switches the phases 42 times per turn.

About the 3D model

A generic outrunner drawn from GEPRC’s published sizes: the 22 × 7.5 mm stator, 27.7 mm bell, 18.25 mm height, 5 mm shaft and 16 mm mounting circle. Anything GEPRC doesn’t publish is typical for a motor this size, and the bell’s spoked top, the base and the inside are a generic design, not this motor’s. The colours are read off the maker’s product photos. There are no logos or markings: it is our drawing, not the maker’s.

Sources

1. GEPRC: GR2207.5 Motor (product page, with the KV options; its description is one long image). Retrieved Oct 19, 2026.
2. GEPRC: GEP-GR2207.5 details (the product page’s description image: what each KV is for, features, photos, design drawing, and bench data at 50% and full throttle on four Gemfan props at 16, 21 and 24 V). Retrieved Oct 19, 2026.
3. GEPRC: GR2207.5 1700KV product photo (first gallery image). Retrieved Oct 19, 2026.