What's in the box:

550 29T Brushed Motor for 1/10 RC Trail Crawler Car HSP HPI Wltoys Kyosho Brushed TRAXXAS Trx-4 Trx-6 (Type 2)

The motor is suitable for 1/10 rc Trail Crawler car HSP HPI Wltoys Kyosho brushed TRAXXAS trx-4 trx-6. It has long-lasting performance with virtually maintenance-free operation.

Features:
Motor size: 550, 3.175mm output shaft.
Virtually maintenance-free operation and long-lasting performance.
Integrated cooling fan pulls cool air through the motor to keep temperatures down. Heat-resistance running motors allow faster speeds, longer runtime, and extending motor life.
Precision balanced rotor, smoothness for best reliability and maximum RPM.
Suitable for 1/10 rc Trail Crawler car HSP HPI Wltoys Kyosho brushed TRAXXAS trx-4 trx-6.

2 types optional:
550 21T Brushed Motor
Size: 550
Turns: 21T
Watts: 91W
Max voltage: 6-8.4V
Max Amps: 48A
IO: 1.4A
Resistance: 0.0043
KV(RPM/Volt): 21T
Max RPM: 12900
Diameter: 36mm
Length: 55mm
Length of extending Shaft: 11mm
Shaft diameter: 3.175mm
Weight: 231g
Package weight: 233g
Package size: 7.5*4*4cm

550 29T Brushed Motor
Size: 550
Turns: 29T
Watts: 71W
Max voltage: 6-8.4V
Max Amps: 39A
IO: 1.4A
Resistance: 0.0043
KV(RPM/Volt): 29T
Max RPM: 10500
Diameter: 36mm
Length: 55mm
Length of extending Shaft: 11mm
Shaft diameter: 3.175mm
Weight: About 231g
Package weight: 234g
Package size: 7.5*4*4cm

Package list: 1*RC 550 motor