Hobbywing XeRun V10 G5 vs V10 G4R comparison: What's Changed?

Apr 16, 2026

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Brushless Motor Hobbywing Motor Comparison RC Motor RC Racing V10 G4R V10 G5 XeRun

Hobbywing XeRun V10 G5 vs V10 G4R comparison: What's Changed?

Hobbywing XeRun V10 G5 vs V10 G4R: What's Changed?

Hobbywing has officially launched the XeRun V10 G5 — the next-generation competition brushless motor designed to push the limits of on-road and touring car racing. But how does it stack up against the proven XeRun V10 G4R? In this post, we break down every key difference so you can decide whether it's time to upgrade.

👉 Shop the XeRun V10 G5 →

Overview: XeRun V10 G5 vs V10 G4R

The V10 series has long been a staple in competitive RC racing. The G5 builds on the G4R's foundation with meaningful engineering improvements across power, thermal management, and tunability — all while shaving weight off the package.

Key Differences at a Glance

1. Maximum Output Power — +3.9%

The G5 delivers 3.9% more maximum output power than the G4R. In a class where milliseconds matter, this translates directly to faster lap times and stronger acceleration out of corners.

2. Heavy-Load Efficiency — +4% Improvement

Under sustained heavy-load conditions, the G5 is more than 4% more efficient than the G4R. Better efficiency means less heat generated, longer run times, and more consistent performance across a full race.

3. Heat Dissipation Hole Area — 15% Larger

Thermal management is critical in competition motors. The G5 features a 15% larger heat dissipation hole area, allowing heat to escape faster and keeping the motor cooler under race conditions.

4. Motor Center of Gravity — Shifted Forward 1.4mm

The G5's center of gravity is shifted 1.4mm forward compared to the G4R. This subtle but deliberate change improves chassis balance and handling feel — a detail that serious racers will appreciate.

5. Motor Weight — G5 is 14g Lighter

The G5 weighs in at 138g, compared to the G4R's 152g. That's a 14g reduction — meaningful for weight-sensitive builds and class regulations.

6. Rotor Special Coating — G5 Only

The G5 features a special rotor coating that the G4R lacks. This coating improves rotor durability and contributes to the motor's efficiency gains.

7. Hall Timing Accuracy — Now Adjustable on G5

One of the most significant upgrades for tuners: the G5 offers adjustable Hall timing accuracy, while the G4R is fixed/unadjustable. This gives racers fine-grained control over power delivery characteristics.

8. Hall Sensing Distance — Also Adjustable on G5

Similarly, Hall sensing distance is adjustable on the G5 (unadjustable on the G4R), opening up additional tuning possibilities for different track conditions and driving styles.

9. KV Rating — G5: 4050KV vs G4R: 4100KV

The G5 runs at 4050KV versus the G4R's 4100KV. The slightly lower KV on the G5 is consistent with its efficiency-first design philosophy — more torque, less wasted energy.

Full Spec Comparison Table

Specification	XeRun V10 G5 13.5T	XeRun V10 G4R 13.5T
Maximum Output Power	+3.9% vs G4R	Baseline
Heavy-load Efficiency	+4% vs G4R	Baseline
Heat Dissipation Hole Area	15% larger than G4R	Baseline
Motor Center of Gravity	1.4mm forward vs G4R	Baseline
Motor Weight	138g	152g
Rotor Special Coating	Yes	No
Hall Timing Accuracy	Adjustable	Unadjustable
Hall Sensing Distance	Adjustable	Unadjustable
KV Rating	4050KV	4100KV
LiPo Cells	1–3S	1–3S
No-load Current	5.4A	5.4A
Type	Brushless / Sensored	Brushless / Sensored
O.D. / Length (mm)	35.8 / 51.5	35.8 / 51.3
Shaft Diameter (mm)	3.175	3.175

Should You Upgrade from G4R to G5?

If you're racing competitively and looking for every legal advantage, the G5 is a compelling upgrade. The combination of more power, better efficiency, improved cooling, adjustable Hall timing, and lower weight makes it a well-rounded improvement over the G4R in virtually every measurable category.

If you're a casual racer or club-level driver, the G4R remains an excellent motor — but the G5 sets a new benchmark for what a stock-class competition motor can deliver.