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Grin Torque Arm V4 Rear

Components Compatible with Grin Torque Arm V4 Rear

Torque ArmSingleM12, M14Rear

Grin's V4 universal rear torque arm is a thick 1/4 inch (6.35 mm) stainless steel plate with a flippable axle plate for horizontal or vertical dropouts and multiple hose-clamp slots. It's a simple, robust legacy-design rear arm for 12 mm and 14 mm axles — superseded by the splined V5/V6/V7 series but still cataloged for straightforward rear hub installations.

37 components are compatible with the Grin Torque Arm V4 Rear, including 37 hub motors.

37 Hub Motors
QS Motor QS212 2000W 45H (10")

QS Motor QS212 2000W 45H (10")

2000W·48–72V·10"

From $84.21
QS Motor QS159.8 1000W 60H

QS Motor QS159.8 1000W 60H

1000W·48–72V·Rear

From $142.87
Varstrom 125XVH 500W Geared Hub Motor (27.5")

Varstrom 125XVH 500W Geared Hub Motor (27.5")

500W·48V·27.5" / 650b

From $233.05Variants
Varstrom 125XVH 500W Geared Hub Motor (700C)

Varstrom 125XVH 500W Geared Hub Motor (700C)

500W·48V·29" / 700c

From $233.05Variants
NBPower 29" 2000W Rear Hub Motor

NBPower 29" 2000W Rear Hub Motor

2000W·48–72V·29" / 700c

From $247.79Variants
NBPower 27.5" 2000W Rear Hub Motor

NBPower 27.5" 2000W Rear Hub Motor

2000W·48–72V·27.5" / 650b

From $247.79Variants
NBPower 26" 2000W Rear Hub Motor

NBPower 26" 2000W Rear Hub Motor

2000W·48–72V·26"

From $247.79Variants
NBPower 29" 3000W Rear Hub Motor

NBPower 29" 3000W Rear Hub Motor

3000W·48–72V·29" / 700c

From $247.79Variants
NBPower 26" 3000W Rear Hub Motor

NBPower 26" 3000W Rear Hub Motor

3000W·48–72V·26"

From $247.79Variants
NBPower 20" 3000W Rear Hub Motor

NBPower 20" 3000W Rear Hub Motor

3000W·48–72V·20"

From $247.79Variants
NBPower 24" 2000W Rear Hub Motor

NBPower 24" 2000W Rear Hub Motor

2000W·48–72V·24"

From $247.79Variants
NBPower 27.5" 3000W Rear Hub Motor

NBPower 27.5" 3000W Rear Hub Motor

3000W·48–72V·27.5" / 650b

From $247.79Variants
NBPower 24" 3000W Rear Hub Motor

NBPower 24" 3000W Rear Hub Motor

3000W·48–72V·24"

From $247.79Variants
NBPower 20" 2000W Rear Hub Motor

NBPower 20" 2000W Rear Hub Motor

2000W·48–72V·20"

From $248.50Variants
Varstrom 125XVH 750W Geared Hub Motor (26")

Varstrom 125XVH 750W Geared Hub Motor (26")

750W·48V·26"

From $254.25Variants
Generic 72V 5000W Fat Direct Drive Hub Motor (26" x 4")

Generic 72V 5000W Fat Direct Drive Hub Motor (26" x 4")

48–72V·26" x 4" (Fat)·Rear

From $281.48Variants
Generic 72V 5000W Fat Direct Drive Hub Motor (24" x 4")

Generic 72V 5000W Fat Direct Drive Hub Motor (24" x 4")

48–72V·24" x 4" (Fat)·Rear

From $281.48Variants
QS Motor QS205 50H V3 3000W 3.5T (18")

QS Motor QS205 50H V3 3000W 3.5T (18")

3000W·48–96V·18"

From $302.03Variants
QS Motor QS205 50H V3 3000W 3T (21")

QS Motor QS205 50H V3 3000W 3T (21")

3000W·48–96V·21"

From $302.03Variants
QS Motor QS205 50H V3 3000W 3T (19")

QS Motor QS205 50H V3 3000W 3T (19")

3000W·48–96V·19"

From $302.03Variants
QS Motor QS212 5000W 60H V4 (10")

QS Motor QS212 5000W 60H V4 (10")

5000W·48–72V·10"

From $348.00
QS Motor QS212 7000W 70H V4 (10")

QS Motor QS212 7000W 70H V4 (10")

7000W·48–72V·10"

From $445.23
QS Motor QS260 3000W V4 (12")

QS Motor QS260 3000W V4 (12")

3000W·48–96V·12"

From $450.00Variants
QS Motor QS273 40H (26×4")

QS Motor QS273 40H (26×4")

4000W·48–96V·26" x 4" (Fat)

From $605.84Variants
QS Motor QS273 40H (24×4")

QS Motor QS273 40H (24×4")

4000W·48–96V·24" x 4" (Fat)

From $605.84Variants
QS Motor QS212 1500W 40H (10")

QS Motor QS212 1500W 40H (10")

1500W·48–72V·10"

From $94,294.00
QS Motor QS273 4000W 50H V3 Spoke (E-Bike)

QS Motor QS273 4000W 50H V3 Spoke (E-Bike)

4000W·48–144V·Rear

Price N/A
QS Motor QS260 5000W V4 (14")

QS Motor QS260 5000W V4 (14")

5000W·48–96V·14"

Price N/AVariants
QS Motor QS205 2000W V3 (10")

QS Motor QS205 2000W V3 (10")

2000W·48–96V·10"

Price N/A
QS Motor QS212 1000W 30H Spoke (V1.12)

QS Motor QS212 1000W 30H Spoke (V1.12)

1000W·48V·Rear

Price N/A
QS Motor QS260 2000W V4 (14")

QS Motor QS260 2000W V4 (14")

2000W·48–96V·14"

Price N/AVariants
QS Motor QS260 3000W V1 (14×4.25")

QS Motor QS260 3000W V1 (14×4.25")

3000W·48–96V·14"

Price N/AVariants
QS Motor QS260 3000W V1 (13×4.25")

QS Motor QS260 3000W V1 (13×4.25")

3000W·48–96V·13"

Price N/AVariants
NBPower 3000W 205-Class Moto Hub Motor 3.5T (17")

NBPower 3000W 205-Class Moto Hub Motor 3.5T (17")

3000W·48–72V·17"

Price N/AVariants
QS Motor QS260 2000W V1 (12×5.0")

QS Motor QS260 2000W V1 (12×5.0")

2000W·48–96V·12"

Price N/AVariants
NBPower 3000W 205-Class Moto Hub Motor 3.5T (21")

NBPower 3000W 205-Class Moto Hub Motor 3.5T (21")

3000W·48–72V·21"

Price N/AVariants
QS Motor QS260 3000W V4 (17×3.5")

QS Motor QS260 3000W V4 (17×3.5")

3000W·48–96V·17"

Price N/AVariants

Frequently Asked Questions

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