SPECTER-S 4.0 — 1000W Mid-Drive Full-Suspension Fat-Tire E-Bike

Built for challenging terrain and all-season exploration, the SPECTER-S 4.0 combines powerful mid-drive performance, long-travel full suspension, and wide fat-tire stability.

The 1000W BAFANG G510 mid-drive motor sends power through the bike’s drivetrain, while the removable 48V 17.5Ah battery provides energy for everyday riding and off-road adventures. A 140mm suspension fork, rear shock, four-piston hydraulic disc brakes, and SRAM NX 11-speed drivetrain help you stay in control across hills, loose surfaces, and uneven trails.

1000W Mid-Drive Power

The 1000W BAFANG G510 mid-drive motor delivers power through the drivetrain instead of directly through the wheel. This central motor position helps distribute weight more evenly and allows the motor to take advantage of the bike’s gearing when climbing or adapting to changing terrain.

Long-Travel Full Suspension

A 140mm-travel EXPLORER suspension fork at the front and an AO-38RC shock at the rear work together to absorb bumps and improve wheel contact over uneven surfaces.

The full-suspension design helps provide greater comfort, stability, and control when riding across trails, gravel roads, and rough terrain.

48V 17.5Ah Battery

The removable 48V 17.5Ah battery uses LG 3500mAh cells in a 13S5P configuration. It is designed to support the power requirements of the 1000W mid-drive system.

Estimated Range: Up to 40miles / 64 km per charge

Optional Secondary Battery Configuration

An optional 48V 5Ah secondary battery configuration uses LG 5000mAh 21700 cells and includes a Type-C output for compatible portable devices.

The secondary battery is an optional configuration and is not included unless specifically selected.

26" × 4.0" Fat-Tire Stability

Wide Kenda K-1151 fat tires provide a larger contact area for enhanced grip and stability. They help the bike maintain control across gravel, dirt, sand, snow, and other loose or uneven surfaces.

The 26" × 4.0" aluminum rims use 12-gauge stainless-steel spokes to support the demands of a powerful fat-tire e-bike.

Smooth SRAM NX 11-Speed Shifting

The SRAM NX 1×11-speed drivetrain provides a practical range of gears for climbing, cruising, and adapting to changing terrain.

An SRAM NX trigger shifter, NX long-cage rear derailleur, and PG-1130 11–42T cassette work together to deliver convenient and controlled gear changes. A gear-shift sensor temporarily interrupts motor power during shifting to help reduce stress on the drivetrain.

Four-Piston Hydraulic Braking

Front and rear HD-E620 four-piston hydraulic disc brakes are paired with 180mm rotors for controlled stopping performance.

The hydraulic system provides consistent braking control across changing terrain and riding conditions.

Clear, Convenient Controls

The handlebar-mounted BAFANG DP C018.CB display provides convenient access to riding information, pedal-assist settings, and system controls.

A thumb throttle provides additional motor control, while the manufacturer-defined display speed limit is set to a maximum of 28 mph.

Adventure-Ready Equipment

The SPECTER-S 4.0 is equipped with an aluminum rear rack, full aluminum fenders, a front light, rear safety light, adjustable kickstand, and platform pedals.

These practical components make the bike ready for recreational riding, trail exploration, and everyday transportation.

Technical Specifications

Electrical System

• Motor: BAFANG G510 mid-drive motor
• Motor Position: Mid-drive
• Rated Motor Output: 1,000W
• Motor Voltage: 48V
• Main Battery: 48V 17.5Ah
• Battery Cells: LG 3500mAh cells
• Cell Configuration: 13S5P
• Battery Management System: 30A BMS
• Low-Voltage Protection: 40.5V
• Battery Type: Removable down-tube battery
• Charge Port: DC2.1
• Display: BAFANG DP C018.CB
• Communication Protocol: UART
• Throttle: Thumb throttle
• Gear-Shift Sensor: Motor cut-off shift sensor
• Optional Secondary Battery: 48V 5Ah
• Optional Battery Cells: LG 5000mAh 21700 cells
• Optional Battery Configuration: 13S1P
• Optional Battery BMS: 30A
• Optional Battery Feature: Type-C output
• Dual-Battery Switcher: 40A × 2 input configuration

Performance and Capacity

• Manufacturer-Defined Speed Setting: Up to 28 mph / approximately 45 km/h
• Estimated Range: _____ miles / _____ km per charge
• Maximum Load: To be confirmed
• Net Weight: To be confirmed

Frame and Suspension

• Frame: 6061 aluminum full-suspension frame
• Frame Size: 17"
• Wheel Size: 26"
• Front Fork: EXPLORER suspension fork
• Front Suspension Travel: 140mm
• Fork Stanchions: 36mm
• Front Hub Spacing: 150mm
• Rear Shock: AO-38RC
• Rear Shock Size: 190mm eye-to-eye
• Rear Suspension Travel: 50mm

Drivetrain

• Drivetrain: SRAM NX 1×11-speed
• Shifter: SRAM NX 11-speed trigger shifter
• Rear Derailleur: SRAM NX 1×11 long cage
• Cassette: SRAM PG-1130, 11–42T
• Chain: KMC e11 Sport
• Chainring: 40T
• Crank Length: 170mm
• Crank Material: Aluminum
• Shift Protection: Motor cut-off gear-shift sensor

Brakes

• Brake Type: Front and rear four-piston hydraulic disc brakes
• Brake Model: HD-E620
• Front Rotor: 180mm
• Rear Rotor: 180mm

Wheels and Tires

• Tires: Kenda K-1151, 26" × 4.0"
• Rims: 26" × 4.0" 6061 aluminum single-wall rims
• Front Hub: 12G × 36H, M15 × 150mm
• Rear Hub: 12G × 36H, M12 × 197mm
• Spokes: 12-gauge, 36-hole, 304 stainless steel

Cockpit and Equipment

• Handlebar: 700mm wide aluminum handlebar
• Handlebar Rise: 25mm
• Stem: 90mm aluminum stem
• Grips: 130mm dual-lock grips
• Seatpost: 31.6 × 280mm aluminum
• Pedals: 9/16" platform pedals with reflectors
• Front Equipment: 6–48V DC front light with reflector
• Rear Safety Equipment: Rear light with reflector
• Rear Rack: Aluminum
• Fenders: Full aluminum front and rear fenders
• Kickstand: Adjustable aluminum kickstand