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48V 500W Mid-Drive Powerhouse: Varstrom × TONG-SHENG TSDZ2B mid-drive motor delivers 48V (500W nominal, 720W peak) with torque sensor technology, 80 N.m torque offering natural pedal assist for urban commutes and gentle slopes. The motor intelligently adapts to your pedaling force for a bicycle-like riding feel
Torque Sensor Technology: One of the standout features of this TSDZ2B kit is the inclusion of a torque sensor. This sensor detects the rider's pedaling effort and adjusts the motor's assistance accordingly. The result is a smoother, more intuitive ride that feels more like traditional cycling, where the motor works in harmony with your own pedaling effort, especially on variable terrain
EKD01 Display with Anti-Theft & Advanced Controls: Compatible with 22.2mm/25.4mm handlebars, the 2.4" IPX5 waterproof EKD01 display shows real-time speed, trip distance, total mileage, battery level, and error codes. Features a password lock, 9-speed adjustment, and 4-level backlight with Type-C charging port. Connectivity enables app-based motor locking, navigation sync, and hidden factory reset to recover forgotten passwords, all in a compact design saving handlebar space.
Universal Fit for 68-73mm Bikes：Directly mounts on standard 68-73mm bottom bracket frames (34-36mm inner diameter). Compatible with 90% of mountain/road bikes – no welding or frame modification required. Includes all mounting hardware.
Versatile 48V Battery Compatibility: Flexible to use with down tube battery (13Ah/19.2Ah/20Ah) or rear rack battery (17.5Ah). With charging adapter, 6Pin battery mount, universal XT60 connector and smart BMS, waterproof port and shockproof housing ensure durability in road/mountain riding.

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Flagship Powerhouse：48V 500W brushless motor (720W peak) with massive 80Nm torque, effortlessly tackles 15% inclines and heavy cargo loads – perfect for mountain trails/urban commuting
All-Weather Warrior：IPX5 certified waterproof housing withstands heavy rain/snow, operates flawlessly from -20℃ to 45℃ (-4°F to 113°F) – built for year-round adventures
Smart Torque Sensing：Advanced 5-point cadence detection delivers 0.1s instant response, mimics natural pedaling feel with 90%+ energy efficiency (vs 60% on basic cadence sensors)
Universal Compatibility：Fits 68-73mm standard bottom brackets, converts 90% of mountain/road/cargo bikes to eBike.
EKD01 Multi-Function Display：5 assist levels + walk mode, real-time tracking of speed/range/power usage, customizable backlight for night rides
[Product Description]--- Professional Mid-Drive Conversion Solution：
Engineered for cyclists seeking natural riding dynamics, the TSDZ2B features dual-sealed industrial bearings and hardened steel gears achieving 98% transmission efficiency. Its proprietary torque-sensing algorithm auto-adjusts power output based on terrain – 30% more efficient than speed-based systems.
Technical Specs：
1. Rated Power: 500W Continuous (720W Peak)
2. Max Torque: 80Nm @ 75 RPM
3. Battery Requirement: 48V Li-ion (Optional)
4. Crankset: CNC 42T Aluminum Chainring
Package Includes：
TSDZ2B Mid-Drive Motor Unit ×1
EKD01 LCD Display ×1
Waterproof Wiring Harness ×1 Set
Full Installation Kit (spacers/crank puller/BB tools)
Motor-Cutoff Brake Levers ×1 Pair or Universal Brake Sensors ×2

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