Torp TM50 Speed Motor For Surron Ultra Bee

Built for road riding and top-end speed, the Torp TM50 Speed Motor is a high-performance power upgrade for the Surron Ultra Bee. The TM50 Speed is engineered to pull hard all the way through the RPM range — not just off the line. Rated up to 55kW peak power and spinning to 13,000 RPM, this is the motor you choose when straight-line speed and high-speed performance matter most.

Whether you're setting up a street build or chasing maximum top speed, the Torp TM50 Speed Motor is designed to stay efficient, stay cool, and keep accelerating.

Key Features

• Built for High RPM Performance – Optimized KV and internal design focus on higher RPM operation and top-end speed.
• Thick Windings = Lower Resistance – Ultra-low 2 mΩ motor resistance helps reduce heat and maximize power output under load.
• Precision Encoder Control – 1024-point (4096 effective) encoder delivers smoother throttle response, cleaner low-speed modulation, and better overall control.
• Ultra Bee Direct Fit – Developed specifically for the Surron Ultra Bee platform (mid-mount configuration).
• TC1000 Compatible – Designed to pair seamlessly with the Torp TC1000 Controller for maximum performance.
• EU Engineering & Quality – Designed and manufactured with high-quality materials for durability and long service life.
• 2-Year Warranty
  

Battery Recommendations

The TM50 Speed Motor is compatible with the stock Ultra Bee battery, but performance is significantly increased with a higher voltage setup. For optimal results, we recommend
80V nominal (22S) battery — 92.4V fully charged. Higher voltage allows the TM50 Speed Motor to fully utilize its high-RPM design and unlock maximum power potential.

Technical Specifications

Peak Power	55 kW
Continuous Power	24 kW
Max Phase Current	1200 A
Max Torque	89 Nm
Torque @ 500A	49 Nm
KV Rating	97 RPM/V
Max RPM	13,000 RPM
Motor Resistance	2 mΩ
Efficiency	Up to 95%
Motor Type	IPM
Cooling	Air
Position Sensor	Encoder
Encoder Resolution	1024 (4096 effective)
Temp Sensor	PT1000
Max Magnet Temp	150°C
Protection Rating	IP67*
Installation	Mid-mount
Pole Pairs	5
Phase Cross-Section	42 mm²
Terminal Lug Size	M6 (50 mm²)
Dimensions	170 × 198 mm
Weight	14.2 kg
Warranty	2 Years

TM50 Speed vs TM50 Pro

Both Torp motors are built for the Ultra Bee — but tuned for different riding styles.

TM50 Speed Motor

• Optimized for high-RPM operation
• Higher KV for greater top speed
• Performs well even on 72V setups (80V recommended)
• Ideal for road builds and speed-focused riders

TM50 Pro Motor

• Optimized for off-road torque delivery
• Stronger low-to-mid RPM efficiency
• More torque per amp
• Best paired with higher voltage battery systems for full potential

If you’re building an Ultra Bee focused on maximum speed and high-RPM performance, the TM50 Speed Motor is the right foundation. However, if you want strong off-road torque with stronger low-to-mid RPMs, the TM50 Pro Motor is the right choice.

Torp Ultra Bee Motors Comparison
	TM50 Pro	TM50 Speed
Torque	102 Nm	89 Nm
Peak Power	58 kW	55 kW
RPM	11,000	13,000
Off-Road	Best	Good
Road	Good	Best
KV Rating	88 RPM/V	97 RPM/V
Weight	31.3 lbs (14.2 kg)	31.3 lbs (14.2 kg)
Acceleration	3-4 s to 100 km/h (60 mph)	3.2-4.2 s to 100 km/h (60 mph)