Serious power upgrade for the Sur-Ron Ultra Bee
The Torp TM50 Pro is a high-performance mid-drive traction motor engineered specifically for the Sur-Ron Ultra Bee. Built around an IPM (Interior Permanent Magnet) design and equipped with a high-resolution encoder, it delivers stronger pull, smoother low-speed control, and the headroom riders want for high-power builds.
With 58 kW peak power and a robust electrical design featuring thick windings and ultra-low resistance (2 mΩ), the TM50 Pro is made to push more power without heat becoming the limiting factor as quickly as with typical setups. Designed and developed in the EU, it’s a premium aftermarket motor for riders who want reliable, repeatable performance—on trails, track days, or aggressive street riding (where legal).
Why the encoder + IPM design matters
Ultra Bee owners upgrading power often want two things: more torque everywhere and better control at low RPM. The TM50 Pro’s encoder position feedback supports more precise motor control—especially at crawl speeds and during technical riding—while the IPM architecture helps deliver strong torque and efficiency across a wider range.
Compatibility & recommended setup
Works with Torp TC1000 controller
The TM50 Pro is designed to pair with the Torp TC1000 motor controller (inverter) for modern FOC control and high-current configurations.
Battery options
The motor can run with the stock Ultra Bee battery. For riders chasing best performance, Torp recommends an 80 V nominal 22S battery, reaching 92.4 V when fully charged.
Key benefits
- 58 kW peak power for high-output Ultra Bee builds
- 24 kW continuous power rating for sustained riding
- Up to 102 Nm max torque (per technical data)
- 49 Nm at 500 A (useful reference for FOC tuning)
- 1200 A max phase current capability for demanding setups
- High-resolution encoder: 1024 (4096) points for smooth, accurate control
- IP67 protection for dust and water resistance (housing tested)
- Low 2 mΩ resistance thanks to thick windings—built to handle power efficiently
- EU designed aftermarket performance motor
Technical specifications
| Specification | Value |
|---|---|
| Motor type | Mid-drive traction motor |
| Motor design | IPM (Interior Permanent Magnet) |
| Peak power | 58 kW |
| Continuous power | 24 kW |
| Max torque | 102 Nm |
| Torque @ 500 A | 49 Nm |
| Max phase current | 1200 A |
| Encoder | 1024 (4096) points |
| Ingress protection | IP67 |
| Motor resistance | 2 mΩ |
| Controller compatibility | Torp TC1000 |
| Battery compatibility | Stock Ultra Bee battery supported; recommended 80 V nominal 22S (92.4 V fully charged) |
Who this motor is for
If you’re searching for a Sur-Ron Ultra Bee performance motor that’s built for high current, smooth FOC control, and real-world durability, the TM50 Pro is aimed at riders who don’t want a mild upgrade—they want a platform for serious power.
