GEPRC SPEEDX2 2105.5

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

• 1.3 kg on 4S

  The 2650KV pulled 1,304 g at full throttle on a GF6026 at 16 V, drawing 34.9 A, and read 84 °C after 5 s.

  Source: GEPRC data table, GEPRC test infographic

• 21 g with wire

  A one-piece 7075 rotor and a hollow titanium alloy shaft keep it to 21 g with 3 cm of wire.

  Source: GEPRC product page, GEPRC weight image

• Flat body, open top

  15.7 mm tall without the shaft, with a top GEPRC opened up to shed heat and keep the motor cooler.

  Source: GEPRC product page, GEPRC drawing

• Damping O-ring

  An O-ring that GEPRC says cuts vibration and lengthens bearing life, on a reinforced base.

  Source: GEPRC features image

What to pair it with

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

ESC

GEPRC ran its full-throttle tests with a 45 A ESC. Its tables peak at 31.7 A for the 2450KV and 34.9 A for the 2650KV and 3450KV, all at 16 V. (GEPRC data table, GEPRC test infographic)

Props

GEPRC tested 76 mm and 90 mm ducted props (GF D76, D76*5, D90*3) and 4 to 6-inch props (GF4024R, HQT5*3R, GF5125R, GF6026). It says the 1.5 mm shaft takes most 3 to 5-inch props. (GEPRC product page, GEPRC data table)

Battery

3S–6S for the 2450KV and 2650KV, 3S–4S for the 3450KV. (GEPRC spec image, GEPRC 3450KV spec image)

Frame

Four M2 holes on a 12 × 12 mm pattern, with M2×6 and M2×7 screws in the box. (GEPRC product page, GEPRC drawing)

Where to buy

• GEPRCthe maker’s store; the same price for every version; 2450KV black, 2650KV black and 2650KV black with an M5 shaft in stock, the titanium versions and the 3450KV out of stock when checked
  $21.99seen 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. A one-piece 7075 rotor with an open top, anodised in two steps. (GEPRC product page, GEPRC weight image, GEPRC build image)
• Shaft. A hollow titanium alloy shaft, 3 mm inside the motor and 1.5 mm where the prop goes. (GEPRC product page, GEPRC weight image)
• Stator. 12N14P with N52H arc magnets; GEPRC calls the stator energy-saving and says it runs with little heat. (GEPRC product page, GEPRC features image)
• Base. A reinforced base, and a damping O-ring for the bearings. (GEPRC features image)

How fast it spins

KV is the motor’s no-load speed per volt. With nothing on the shaft, the 2650KV 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 21 × 5.5 mm stator, 25.65 mm bell, 15.7 mm height, 1.5 mm shaft, 12 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

1. GEPRC: SPEEDX2 2105.5 2450KV/2650KV/3450KV Motor (product page, with the spec list for each KV). Retrieved Oct 19, 2026.
2. GEPRC: SPEEDX2 2105.5 product drawing (image on the product page). Retrieved Oct 19, 2026.
3. GEPRC: SPEEDX2 2105.5 2450KV and 2650KV specifications (image on the product page). Retrieved Oct 19, 2026.
4. GEPRC: SPEEDX2 2105.5 3450KV specifications (image on the product page). Retrieved Oct 19, 2026.
5. GEPRC: SPEEDX2 2105.5 motor data table, 50% and 100% throttle at 12 V, 16 V and 24 V on ducted and 4 to 6-inch props (image on the product page). Temperatures are after 5 s at full throttle (S6). The first of its three tables is labelled 2650KV, like the second, but its full-throttle peak (31.7 A, 507.2 W) is the 2450KV’s max current and power and its currents run below the second table’s, so it is recorded as the 2450KV.. Retrieved Oct 19, 2026.
6. GEPRC: SPEEDX2 2105.5 full-throttle results with an F45A ESC at 16 V: 2650KV on a GF6026 (84 °C after 5 s) and 3450KV on a GFD90*3 (83 °C), ambient 25 °C (infographic on the product page). Retrieved Oct 19, 2026.
7. GEPRC: SPEEDX2 2105.5 weight (one-piece 7075 rotor, hollow titanium alloy shaft, 21 g; image on the product page). Retrieved Oct 19, 2026.
8. GEPRC: SPEEDX2 2105.5 build (one-piece 7075 rotor, customised bearings, two-step anodising; image on the product page). Retrieved Oct 19, 2026.
9. GEPRC: SPEEDX2 2105.5 features (N52H arc magnets, energy-saving stator; image on the product page). Retrieved Oct 19, 2026.
10. GEPRC: SPEEDX2 2105.5 features (damping O-ring, 1.5 mm shaft, reinforced base; image on the product page). Retrieved Oct 19, 2026.
11. GEPRC: SPEEDX2 2105.5 titanium version, two motors (first gallery image). Retrieved Oct 19, 2026.
12. GEPRC: SPEEDX2 2105.5 sizes: 1.5 mm shaft, 17.4 mm overall, 25.65 mm across, 150 mm leads (gallery image). Retrieved Oct 19, 2026.