The Hobbywing Xerun Justock 3650SD G2.1 in black is a sensored brushless motor designed for stock classes. Here are some features and specifications:

Differences from the Justock G2 model:

Welding Connector: G2 has a plug-in connector, whereas G2.1 has soldering similar to G3.

Higher Timing and KV: G2.1 has higher timing than G2, producing more KV with the same turn in T. Overall, the performance of G2.1 is better than G2.

Construction:

Uses a heat-resistant magnet attached to a steel case and double-insulated winding.

High-precision bearings and rotor with a strong structure for exceptional performance and durability.

Linear and Smooth Control:

The built-in end bell with non-adjustable Hall sensor, along with a high-precision and balanced rotor, ensures smooth and linear control.

Silicone O-Ring Seal:

A silicone O-ring seal between the end bell and stator helps dissipate internal heat to the motor case and prevents dust from entering the Hall sensor.

Rebuildable Design:

The end bell is easy to disassemble for maintenance and replacement of common wear parts like the rotor and sensor module.

Compatibility with XR10 Justock ESC:

Perfectly compatible with the XR10-Justock ESC for races with zero-timing specification and also works with other Hobbywing ESCs, including other brands.

Compliance with IFMAR and ROAR Standards:

The motor design complies with IFMAR and ROAR specifications.

Specifications:

LiPo: 2~3S

Resistance (Ω): 0.075

No-Load Current: 2.4A

Max Output Power: 265W

Current @ M.O.P Point: 72A

Dimensions (mm): Outer Diameter 36, Length 52.5

Shaft (mm): Diameter 3.17, Length of the projection piece 15

Poles: 2

Weight: 201g

Applicable: 1:10, 1:12 On-Road (Truggy / Drifting Car / F1 / Monster) & Off-Road (Buggy / 2WD SC Truck / Truck) STOCK / SPORT Race (choose the motor base according to competition rules) and free/casual races for new beginners.