5-inch FPV freestyle motor
GEPRC GR2306.5
A 31.5 g 2306.5 for 5-inch quads on 4S–6S, with a 1350KV for 6 to 7-inch props; on GEPRC’s bench the 2450KV pulls up to 2,381 g per motor at 21 V and the 1850KV 2,287 g at 24 V.
- 5-inch quads
- 4S–5S (2450KV) or 5S–6S (1850KV)
- 6 to 7-inch props (1350KV)
The spin is an illustration: the model turns at 1/600 of the no-load speed, and it is a generic 2306.5 motor drawn from GEPRC’s published sizes, not its exact design. Thrust, current and power are GEPRC’s bench figures for the GF6*4.5*2 prop at 21 V, read straight across between its throttle steps. Its data starts at 50% throttle.
- Max thrust
- 2,381 g
- GF6*4.5*2 prop, 21 V
- Weight
- 31.5 g
- with 3 cm of wire, the same for all three KVs; the product page gives 31 g without wire
- Peak current
- 48.9 A
- full throttle
- Max power
- 1,027 W
- full throttle
Plain links: we earn nothing from them.
What it pulls
GEPRC’s own bench test, one line per prop. Drag across the chart to move the throttle; the model above follows.
At 60% with the GF6*4.5*2: 1,256 g of thrust, 19.3 A, 405 W, 3.59 g per watt.
On your quad
14.7 : 1
Thrust to weight at full throttle: four motors pull 9,524 g with the GF6*4.5*2 at 21 V.
At 60% throttle they pull 5,025 g, 7.7 times the quad’s weight.
All-up weight is the quad ready to fly, with its battery and camera. The thrust is the maker’s static bench figure; in the air it is lower.
What you get
About 2.4 kg on 5S
The 2450KV pulled 2,381 g at full throttle on a GF6*4.5*2 at 21 V, drawing 48.9 A.
Source: GEPRC 2450KV sheet
1350KV for 7-inch
On a DAL 7×5.6×3 at 24 V the 1350KV pulled 2,278 g at 28.6 A.
Source: GEPRC 1350KV sheet
Efficient at low current
GEPRC gives more than 85% efficiency between 3 and 7 A for the 1850KV and 2450KV, and more than 86% between 3 and 5 A for the 1350KV.
Source: GEPRC 1350KV sheet, GEPRC 1850KV sheet, GEPRC 2450KV sheet
What to pair it with
Our reading of GEPRC’s numbers, so your build matches what the motor was tested with.
- ESC
- GEPRC’s max currents at 5S are 29 A (1350KV), 36 A (1850KV) and 49 A (2450KV); its tables peak at 48.9 A, for the 2450KV on a GF6*4.5*2 at 21 V. (GEPRC 1350KV sheet, GEPRC 1850KV sheet, GEPRC 2450KV sheet)
- Props
- GEPRC tested the 1850KV and 2450KV on GF5*4*3, DAL5*4.6*3, GF5.1*5.2*3 and GF6*4.5*2 props, and the 1350KV on GF56*4.5*2, GF6*4*3 and DAL7*5.6*3. (GEPRC 1350KV sheet, GEPRC 1850KV sheet, GEPRC 2450KV sheet)
- Battery
- 4S–5S for the 2450KV, 5S–6S for the 1350KV and 1850KV. (GEPRC 1350KV sheet, GEPRC 1850KV sheet, GEPRC 2450KV sheet)
- Frame
- Four M3 holes on a 16 × 16 mm pattern; M3×7 and M3×8 button-head screws come in the box. (GEPRC product page, GEPRC 2450KV sheet)
Where to buy
- GEPRCthe maker’s store; only the 2450KV is listed, $9.90 reduced from $19.99, out of stock when checked$9.90seen Oct 19, 2026Visit
Plain links, not affiliate links. Prices change; the store’s page has the current one.
Full specs
| Spec | Value | Source |
|---|---|---|
| KV | 2,450 rpm/V (also 1350KV and 1850KV) | GEPRC product page, GEPRC 2450KV sheet |
| Stator | 23 × 6.5 mm (2306.5) | GEPRC product page, GEPRC 2450KV sheet |
| Configuration | 12N14P (12 stator slots, 14 magnet poles) | GEPRC product page, GEPRC 2450KV sheet |
| Battery | 4S–5S LiPo (2450KV); 5S–6S (1350KV and 1850KV) | GEPRC product page, GEPRC 1350KV sheet, GEPRC 1850KV sheet, GEPRC 2450KV sheet |
| Weight | 31.5 g (with 3 cm of wire, the same for all three KVs; the product page gives 31 g without wire) | GEPRC 1350KV sheet, GEPRC 1850KV sheet, GEPRC 2450KV sheet |
| Dimensions | φ28.2 × 29.2 mm with the shaft; 16.4 mm without it, with 12.8 mm of shaft above the bell | GEPRC product page, GEPRC 2450KV sheet |
| Shaft | Hollow, with an M5 thread, standing 12.8 mm above the bell (GEPRC lists the shaft as 4 mm hollow; its drawing marks Φ5 at the thread, and an M5 lock nut comes in the box) | GEPRC product page, GEPRC 2450KV sheet |
| Mounting | 4 × M3 holes on a 16 mm circle (16 × 16 mm) | GEPRC 2450KV sheet |
| Magnets | N52H arc magnets | GEPRC product page |
| Bearings | ISC (Japan) (GEPRC gives them as “JAPAN ISC”) | GEPRC product page |
| Internal resistance | 38 mΩ (1850KV 58 mΩ, 1350KV 90 mΩ) | GEPRC product page, GEPRC 2450KV sheet |
| Idle current | 1.95 A (at 10 V; 1850KV 1.15 A, 1350KV 0.8 A) | GEPRC product page, GEPRC 2450KV sheet |
| Max current | 49 A (GEPRC gives it at 5S; 1850KV 36 A, 1350KV 29 A) | GEPRC product page, GEPRC 2450KV sheet |
| Max continuous power | 1,000 W (GEPRC gives it at 5S; 1850KV 850 W, 1350KV 700 W) | GEPRC product page, GEPRC 2450KV sheet |
| Leads | 20 AWG | GEPRC product page |
| In the box | An aluminium M5 lock nut, 4 × M3×7 and 4 × M3×8 button-head screws | GEPRC product page |
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.
1350KV on 5S–6S6 props
| Prop | Throttle | Current (A) | Thrust (g) | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|
| DAL7*5.6*3at 24 Vmotor at 86 °C | 50% | 6.8 | 991 | 163.2 | 6.072 |
| 100% | 28.6 | 2,278 | 686.4 | 3.319 | |
| GF6*4*3at 24 Vmotor at 73 °C | 50% | 4.3 | 729 | 103.2 | 7.064 |
| 100% | 23.3 | 1,928 | 559.2 | 3.448 | |
| DAL7*5.6*3at 21 Vmotor at 73 °C | 50% | 4.9 | 721 | 102.9 | 7.007 |
| 100% | 23.3 | 1,921 | 489.3 | 3.926 | |
| GF56*4.5*2at 24 Vmotor at 64 °C | 50% | 3.8 | 615 | 91.2 | 6.743 |
| 100% | 18.7 | 1,669 | 448.8 | 3.719 | |
| GF6*4*3at 21 Vmotor at 62 °C | 50% | 3.5 | 546 | 73.5 | 7.429 |
| 100% | 17.9 | 1,549 | 375.9 | 4.121 | |
| GF56*4.5*2at 21 Vmotor at 56 °C | 50% | 3 | 464 | 63 | 7.365 |
| 100% | 14.2 | 1,298 | 298.2 | 4.353 |
Source: GEPRC 1350KV sheet
1850KV on 5S–6S8 props
| Prop | Throttle | Current (A) | Thrust (g) | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|
| GF6*4.5*2at 24 Vmotor at 82 °C | 50% | 7.5 | 901 | 180 | 5.006 |
| 100% | 35.5 | 2,287 | 852 | 2.684 | |
| DAL5*4.6*3at 24 Vmotor at 73 °C | 50% | 6.2 | 708 | 148.8 | 4.758 |
| 100% | 30.6 | 1,988 | 734.4 | 2.707 | |
| GF6*4.5*2at 21 Vmotor at 69 °C | 50% | 6.2 | 685 | 130.2 | 5.261 |
| 100% | 27.9 | 1,845 | 585.9 | 3.149 | |
| GF5.1*5.2*3at 24 Vmotor at 75 °C | 50% | 7.4 | 726 | 177.6 | 4.088 |
| 100% | 31.8 | 1,805 | 763.2 | 2.365 | |
| GF5*4*3at 24 Vmotor at 59 °C | 50% | 5 | 638 | 120 | 5.317 |
| 100% | 21.7 | 1,778 | 520.8 | 3.414 | |
| DAL5*4.6*3at 21 Vmotor at 61 °C | 50% | 4.9 | 535 | 102.9 | 5.199 |
| 100% | 23.5 | 1,548 | 493.5 | 3.137 | |
| GF5.1*5.2*3at 21 Vmotor at 63 °C | 50% | 4.7 | 512 | 98.7 | 5.187 |
| 100% | 24.9 | 1,445 | 522.9 | 2.763 | |
| GF5*4*3at 21 Vmotor at 52 °C | 50% | 3.8 | 479 | 79.8 | 6.003 |
| 100% | 16.7 | 1,318 | 350.7 | 3.758 |
Source: GEPRC 1850KV sheet
2450KV on 4S–5S8 props
| Prop | Throttle | Current (A) | Thrust (g) | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|
| GF6*4.5*2at 21 Vmotor at 86 °C | 50% | 11.9 | 975 | 249.9 | 3.902 |
| 100% | 48.9 | 2,381 | 1026.9 | 2.319 | |
| DAL5*4.6*3at 21 Vmotor at 76 °C | 50% | 9.7 | 830 | 203.7 | 4.075 |
| 100% | 42 | 2,079 | 882 | 2.357 | |
| GF5.1*5.2*3at 21 Vmotor at 80 °C | 50% | 9.7 | 769 | 203.7 | 3.775 |
| 100% | 44.8 | 1,928 | 940.8 | 2.049 | |
| GF6*4.5*2at 17 Vmotor at 74 °C | 50% | 9.1 | 784 | 154.7 | 5.068 |
| 100% | 38 | 1,918 | 646 | 2.969 | |
| GF5*4*3at 21 Vmotor at 63 °C | 50% | 7.4 | 730 | 155.4 | 4.698 |
| 100% | 31.1 | 1,898 | 653.1 | 2.906 | |
| DAL5*4.6*3at 17 Vmotor at 65 °C | 50% | 7.2 | 615 | 122.4 | 5.025 |
| 100% | 32.8 | 1,651 | 557.6 | 2.961 | |
| GF5.1*5.2*3at 17 Vmotor at 67 °C | 50% | 7.9 | 605 | 134.3 | 4.505 |
| 100% | 34.6 | 1,538 | 588.2 | 2.615 | |
| GF5*4*3at 17 Vmotor at 55 °C | 50% | 6.5 | 547 | 110.5 | 4.95 |
| 100% | 24.1 | 1,460 | 409.7 | 3.564 |
Source: GEPRC 2450KV sheet
Inside the motor
A brushless outrunner: the coils stand still in the middle and the magnets spin around them. From the top down:
- Magnets. N52H arc magnets. (GEPRC product page)
- Base. GEPRC gives the base casing as 7075 aluminium. (GEPRC product page)
- Shaft. A hollow shaft with an M5 thread, held by an aluminium M5 lock nut. (GEPRC product page, GEPRC 2450KV sheet)
- Bearings. ISC bearings from Japan, as GEPRC gives them. (GEPRC product page)
How fast it spins
KV is the motor’s no-load speed per volt. With nothing on the shaft, the 2450KV 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.
| Battery | Volts | No-load rpm (KV × V) | Electrical frequency | ESC steps per second |
|---|---|---|---|---|
| 4S nominal | 14.8 | 36,260 | 4,230 Hz | 25,382 |
| 4S full | 16.8 | 41,160 | 4,802 Hz | 28,812 |
| 6S nominal | 22.2 | 54,390 | 6,346 Hz | 38,073 |
| 6S full | 25.2 | 61,740 | 7,203 Hz | 43,218 |
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 23 × 6.5 mm stator, 28.2 mm bell, 16.4 mm height, 5 mm shaft, 16 mm mounting circle and 12 teeth and 14 magnets. 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
- GEPRC: GR2306.5 1350KV / 1850KV / 2450KV Motors (product page, with the 2450KV’s spec list). Retrieved Oct 19, 2026.
- GEPRC: GR2306.5 1350KV technical data, drawing and motor data at 21 V and 24 V on three props, 50% and 100% throttle (image on the product page). Temperatures are after 5 s at full throttle; GEPRC marks 86 °C as hot.. Retrieved Oct 19, 2026.
- GEPRC: GR2306.5 1850KV technical data, drawing and motor data at 21 V and 24 V on four props, 50% and 100% throttle (image on the product page). Temperatures are after 5 s at full throttle; GEPRC marks 82 °C as hot.. Retrieved Oct 19, 2026.
- GEPRC: GR2306.5 2450KV technical data, drawing and motor data at 17 V and 21 V on four props, 50% and 100% throttle (image on the product page). Temperatures are after 5 s at full throttle; GEPRC marks 86 °C as hot.. Retrieved Oct 19, 2026.
- GEPRC: GR2306.5 product photo, two motors (first gallery image). Retrieved Oct 19, 2026.
- GEPRC: GR2306.5 from above, showing the five-arm top (gallery image). Retrieved Oct 19, 2026.
