Eunorau SPECTER-S 4.0 / Hunter X9

The Eunorau SPECTER-S 4.0, also badged as the Hunter X9, is a full-suspension fat-tire electric bike built around a BAFANG G510 mid-drive unit rated at 48V and 1000W. Because the drive sits at the cranks rather than inside a wheel hub, its output passes through the bike's own gearing, which lets the rider pick a gear to suit the grade instead of being stuck with one fixed drive ratio. Mounting the motor near the center of the frame also keeps the heaviest electrical component low and between the wheels rather than hung off one end of the bike.

Both ends of the chassis are sprung. An EXPLORER fork handles 140mm of front travel and an AO-38RC shock adds 50mm at the rear, so the wheels can track over broken pavement, gravel, and rooted trail instead of passing every impact straight into the rider. Kenda K-1151 tires in a 26 x 4.0-inch size sit on single-wall 6061 aluminum rims for a wide contact patch on loose ground, and braking comes from HD-E620 four-piston hydraulic calipers with 180mm rotors at the front and rear. Gearing is a SRAM NX 1 x 11 setup pairing a 40T chainring with an 11-42T PG-1130 cassette, and a shift sensor momentarily drops motor output while the chain moves between cogs.

Energy comes from a 48V 17.5Ah downtube pack built on LG cells with a 30A BMS. It locks to the frame for riding and lifts out for charging or storage indoors. Eunorau quotes an estimated range of up to 40 miles on the included battery, or a combined figure of up to 52 miles when an optional second pack is added. Rider inputs run through a BAFANG DP C018.CB display and a thumb throttle, with the display permitting up to a manufacturer-defined 28 mph. The frame comes in 16-inch and 18-inch sizes, paired with a 700mm handlebar, 90mm stem, and 170mm cranks; payload is rated at 300 lb and the bike itself weighs 83.7 lb. An aluminum rear rack, full aluminum fenders, an adjustable kickstand, front and rear lights with reflectors, a Eunorau Comfort C7 saddle, and reflectorized platform pedals are all fitted as standard.

Eunorau lists the SPECTER-S 4.0 as leaving the factory in a default Class 2 setting, with the handlebar display allowing assistance up to a manufacturer-defined 28 mph. Riders should understand that the motor's 1000W rating sits above the 750W ceiling the US federal definition of a low-speed electric bicycle uses, and how a machine like this gets classified is decided state by state rather than nationally. Some states treat it as an electric bicycle, others place it in a moped or motor-vehicle category, and many limit where it may be ridden. We make no claim that this bike is street legal and we assign it no class rating beyond what Eunorau publishes. Confirm your own state and municipal rules, along with the posted rules of any road, bike path, or trail network you plan to use, before you ride.

Standard Equipment

• 48V 17.5Ah removable downtube battery with LG cells and a 30A BMS
• BAFANG DP C018.CB handlebar display and thumb throttle
• Aluminum rear rack and full aluminum front and rear fenders
• Front 6-48V DC light and rear light, both with reflectors
• Adjustable aluminum kickstand
• Eunorau Comfort C7 saddle and 130mm dual-lock grips
• 9/16-inch platform pedals with reflectors