Eunorau Specter S 4.0 Full-Suspension E-Bike Review

With 140mm of front travel and 50mm at the rear, the Specter S 4.0, which the store also markets as the Hunter X9, is listed at $3,799 as a mid-drive bike with a BAFANG G510 motor rated 48V / 1,000W, a 48V 17.5Ah removable battery and 26 x 4.0-inch Kenda tires. The page gives a net weight of 83.7 lbs and its header lists Default Class 2. The specification table adds a manufacturer-defined display limit of up to 28 mph / approximately 45 km/h.

Specifications

Options and pricing

The page lists two colors, Moon Black and Army Green, and two frame sizes, 16'' and 18'', for four variants at one price of $3,799, all in stock when read; it shows no crossed-out price. The page lists an aluminum rear rack, full aluminum fenders and an adjustable kickstand with the bike. The 48V 5Ah secondary battery is not included; the page lists a 48V5AH Secondary Ebike Battery with Type-C Port at $219.00 and a 27.5 x 3 inch wheel set at $399.00.

How it compares

The Eunorau Specter-ST 2.0 Step-Through Mid-Drive E-Bike is $2,999 with a 1000W mid-drive, the same 48V17.5Ah main battery and up to 80 Miles on dual batteries, where this bike lists up to 40 miles and up to 52 mi combined. The Eunorau FAT-HS (Hunter X8) Mid-Drive Fat-Tire E-Bike is $3,449 with a 1000W mid drive, a 48V15Ah battery and Class 3, against this page's Default Class 2.

Shipping, returns and warranty

Shipping: the shipping page says e-bikes ship free by FedEx or UPS to the lower 48 states from warehouses in Las Vegas, with 1 to 3 business days of processing and an estimated 5 to 7 days in transit; Hawaii, Alaska and other countries need the +$500 shipping option at checkout (estimated 7 to 15 days), and carriers can add a charge for remote areas. Returns: an order can be cancelled for a full refund before it ships or is produced, but not after it ships; the page asks buyers not to refuse a delivered e-bike and to contact the store instead. A return must be applied for within 7 calendar days of receipt, the product must be new and re-sellable (not assembled, ridden, used or damaged) and complete with its manuals, accessories and original packaging, and the buyer ships it back within 7 days at their own cost to Eunorau's warehouses in the US, Australia, Europe or the UK. The store inspects it within 5 days and refunds in full when the fault is Eunorau's (wrong, damaged or defective item) or minus the shipping cost when the reason is the customer's. The terms page says customers are charged shipping only once, returns included, with no restocking fee, which does not match the return page's wording. Warranty: the 24-Month+ Limited Warranty on bikes bought in the US or Canada from 1 August 2023 covers manufacturing defects only: the frame for 10 years and the battery, motor and electrical components for 24 months, without labor or normal wear (brake pads, rotors, spokes, grips, shifters, cables, tires, chains, chainrings, cassettes). It is for the original purchaser, needs product registration right after purchase and an inspection by an authorized specialist or dealer after the first year, is cut by 50% for commercial use, does not cover free gifts or pre-installed racks and fenders, and excludes shipping damage (report it at once with photos or video). Disputes under the warranty go to binding individual arbitration (AAA rules, Nevada law) unless the buyer emails an opt-out within 30 days of purchase.

Before you buy

The page shows no customer reviews. Reputation: Eunorau E-Mobility USA Corp has an F grade on the Better Business Bureau, is not BBB accredited and has 2 complaints on file, both marked unanswered: a December 2025 request for proof that a bike sold as new was new, and a May 2025 report of a battery cover that would not latch, which the buyer attributes to a frame defect. A web search on 21 October 2026 found no Trustpilot page for Eunorau. The store says it has specialised in e-bikes since 2009 and designs its bikes in the US and manufactures them in Shanghai, while the BBB lists a business start date of 12 December 2019; the eunorau-ebike.com domain was registered on 27 July 2016. The page shows a live 'people are viewing this right now' counter, which we could not verify. The store's FAQ defines Class 1, 2 and 3 e-bikes by assist or throttle and a 20 or 28 mph limit and says laws vary by state and country, so check local rules; many bike pages list a speed limit as 'Unlockable'.