EUNORAU SPECTER-S 4.0 Electric Mountain Bike

$3,799.00 USD

Sale Sold out

Black Friday: $3,229.15 (-15%) Nov 23–30. Applied automatically in your cart.

Shipping calculated at checkout.

Free shipping across the contiguous US

Color: Moon Black

Frame Size 16'' 18''

Free shipping4–9 business days
10-yr frame warrantyDamage & defects covered
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Real supportMon–Fri, 9–5 MT

The EUNORAU SPECTER-S 4.0 is a mid-drive full suspension fat tire e-bike with a 1000W Bafang G510 motor, a 140mm travel fork and SRAM NX 11-speed gearing. It comes trail-ready with a rack, fenders and lights.

Key Features

Bafang G510 1000W mid-drive motor
48V 17.5Ah removable battery, LG cells
Up to 40 miles per charge
Up to 28 mph (manufacturer setting)
140mm travel fork with 36mm stanchions
SRAM NX 1x11 drivetrain, 11-42T
4-piston hydraulic disc brakes, 180mm rotors
Kenda 26 x 4.0 inch fat tires
Rear rack and aluminum fenders included
Optional 48V 5Ah secondary battery

Specifications

Motor	BAFANG G510 mid-drive, 48V, 1,000W rated
Main Battery	48V 17.5Ah removable down-tube battery, LG 3500mAh cells, 13S5P, 30A BMS, DC2.1 charge port
Optional Secondary Battery	48V 5Ah, LG 5000mAh 21700 cells, Type-C output
Estimated Range	Up to 40 miles / 64 km per charge
Display	BAFANG DP C018.CB
Throttle	Thumb throttle
Shift Protection	Motor cut-off gear-shift sensor
Speed Setting	Up to 28 mph / approx. 45 km/h (manufacturer-defined)
Frame	6061 aluminum full-suspension frame, 16" or 18"
Front Fork	EXPLORER suspension fork, 140mm travel, 36mm stanchions, 15×150mm axle
Rear Shock	AO-38RC, 190mm eye-to-eye
Drivetrain	SRAM NX 1×11-speed, NX trigger shifter, NX long-cage rear derailleur
Cassette / Chain	SRAM PG-1130 11–42T / KMC e11 Sport
Chainring / Crank	40T / 170mm aluminum
Brakes	HD-E620 four-piston hydraulic disc brakes, 180mm rotors front and rear
Tires	Kenda K-1151, 26" × 4.0"
Rims / Spokes	26" × 4.0" 6061 aluminum, 12-gauge 36-hole 304 stainless steel spokes
Handlebar / Stem	700mm aluminum, 25mm rise / 90mm aluminum stem
Seatpost	31.6 × 280mm aluminum
Pedals	9/16" platform pedals with reflectors
Lights	6–48V DC front light, rear light with reflector
Included	Aluminum rear rack, full aluminum fenders, adjustable kickstand

Product Description

The SPECTER-S 4.0 (also sold as Hunter X9) uses a Bafang G510 mid-drive motor rated at 1000W. The motor sits at the crank and drives through the gears, which keeps weight centered and gives you strong pulling power on steep climbs in low gears.

The removable down-tube battery holds 48V 17.5Ah with LG 3500mAh cells and is rated for up to 40 miles per charge. For longer rides, you can add the optional 48V 5Ah secondary battery, which also has a Type-C output for charging devices.

Up front, an EXPLORER fork with 140mm of travel and 36mm stanchions handles roots and rocks, and an AO-38RC shock controls the rear. A SRAM NX 1x11 drivetrain with an 11-42T cassette covers steep climbs and fast flats, and a shift sensor briefly cuts motor power while you change gears to protect the chain. HD-E620 four-piston hydraulic brakes with 180mm rotors stop the bike. The aluminum rack, full fenders, front and rear lights and kickstand come installed. Frame sizes are 16 and 18 inches.

Package Includes

EUNORAU SPECTER-S 4.0 electric bike
48V 17.5Ah removable battery
Charger
User manual

Shipping & Returns

Free standard shipping on every order within the contiguous United States. We do not ship to Alaska, Hawaii, Puerto Rico or other U.S. territories.
Ships directly from the manufacturer's U.S. warehouse. Orders are processed in 1–2 business days and arrive in 4–9 business days on average, with a tracking number sent by email once your order ships.
No returns after delivery. EUNORAU does not accept delivered bikes back, so this sale is final once delivered. You can cancel for a full refund until the order ships.
Damaged in shipping or defective? Report it within 48 hours of delivery with photos and a short video. Confirmed issues are covered with free replacement parts and free shipping for those parts.
Warranty: 10 years on the frame, 2 years on the motor and battery.
Every return needs approval first: email info@evolveride.com before sending anything back. Refunds go to your original payment method within 7 business days after the return is received and approved.

Shipping Policy Return & Refund Policy Return Terms by Brand

Frequently Asked Questions

How far can the EUNORAU SPECTER-S 4.0 go on a single charge?

The EUNORAU SPECTER-S 4.0 is rated for up to 40 miles / 64 km per charge. Real-world range depends on rider weight, terrain, speed, pedal-assist level and temperature, so expect less at full throttle, on steep hills or in cold weather.

What is the top speed of the EUNORAU SPECTER-S 4.0?

The manufacturer-defined speed setting allows up to 28 mph (about 45 km/h). Check your state and local rules for e-bikes before riding at full speed on public roads or paths.

What battery does the EUNORAU SPECTER-S 4.0 use?

It uses a removable 48V 17.5Ah down-tube battery with LG cells. An optional 48V 5Ah secondary battery is also available for extra range.

How powerful is the EUNORAU SPECTER-S 4.0 motor?

The EUNORAU SPECTER-S 4.0 uses a BAFANG G510 mid-drive motor (48V, 1,000W rated) with a gear-shift sensor that cuts motor power while you shift.

Is shipping free, and can I return the EUNORAU SPECTER-S 4.0?

EvolveRide ships the EUNORAU SPECTER-S 4.0 free across the contiguous US, with delivery typically in 4–9 business days. EUNORAU does not accept returns after delivery, but shipping damage and defects are covered, and the frame carries a 10-year warranty — see our return terms for details.