Eunorau's fat-tire, dual-motor and mid-drive e-bikes (Defender S, Specter, FAT-HS, FAT-HD, FAT-AWD, Urus) compared by motor, battery, weight and price.
Eunorau Defender S 2.0 Dual-Motor E-Bike — read reviewA dual-motor, full-suspension fat-tire e-bike listed at $2,799, with a 750W hub motor on each wheel (1,500W combined rated power), a removable 48V 17Ah battery and 26 x 4.0-inch tires. It suits riders who want two motors and full suspension; the page lists 89.3 lb.
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Eunorau FAT-HS Mid-Drive Fat-Tire E-Bike — read reviewA full-suspension mid-drive fat-tire e-bike listed at $3,449, with a 1000W Bafang M615 motor, a 48V15Ah battery and 26 x 4.0 Kenda tires. It suits riders who want full suspension, with a second battery only on the 19'' frame; the page lists 77.1 lbs.
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Eunorau FAT-AWD 2.0 Dual-Motor E-Bike — read reviewA dual-motor fat-tire e-bike listed from $1,699, with a 500W hub motor on each wheel, a 48V 15Ah battery and 26 x 4.0 tires. It suits riders who want a front, rear or dual drive switch; the page gives 81.5 lbs for the step-over frame.
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Eunorau FAT-HD 1.0 Pro Fat-Tire E-Bike — read reviewA mid-drive fat-tire e-bike listed from $1,999, with a Bafang 1,000W motor, a 48V 25Ah battery and 26 x 4.0 Kenda tires. It suits riders who want one larger battery rather than a second pack; the page gives 78.7 lbs and a 375 lbs payload.
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Eunorau FAT-HD 2.0 Fat-Tire E-Bike — read reviewPriced from $2,399, this mid-drive fat-tire e-bike has a BAFANG 1000W motor, a removable 48V 15Ah battery and 26 x 4.0 tires. It suits riders who may add the optional second 15Ah pack; the page lists 81.57 lbs and a 375 lbs payload.
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Eunorau Specter-ST 2.0 Step-Through E-Bike — read reviewA step-through mid-drive e-bike listed at $2,999, with a 1000W Bafang M620 motor, a 48V17.5Ah main battery, full suspension and 27.5 x 3.0 tires. It suits riders who want a step-through frame; the page gives a 490mm/19.3in standover and 88lbs.
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Eunorau Specter S 4.0 Full-Suspension E-Bike — read reviewListed at $3,799, this full-suspension mid-drive e-bike has a BAFANG G510 motor rated 48V / 1,000W, a 48V 17.5Ah removable battery and 26 x 4.0-inch Kenda tires. It suits riders who want a rack and fenders listed with the bike; the page lists 83.7 lbs.
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Eunorau URUS 2.0 Mid-Drive E-Bike — read reviewA 48V 500W BAFANG M600 mid-drive motor (up to 120 N.m) drives this full-suspension e-bike, listed at $3,999 with a 48V 17.5Ah removable battery and 27.5 x 2.8-inch MAXXIS tires. It suits riders who want a dropper post and will add lights; the page lists 61.7 lbs.
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DYU UX BMX 20-Inch Fat Tire E-Bike — read reviewA retro-styled 20 x 3-inch fat-tire e-bike listed at €899, with a 250W motor, a 48V 13Ah removable battery and 57 lbs on its spec list. The spec list gives a recommended rider height of 5'5"-6'2", and no outside test of it was found.
DYU M20 All-Terrain Electric Bike — read reviewA non-folding all-terrain e-bike listed at €899, with a 250W rated motor (1000W peak), a 48V 18.2Ah battery and a 40kg net weight on its spec list. The page contradicts itself on range, slope and city use, and the only outside video covers a different US-market M20.
The 10 all-terrain e-bikes here come from two stores that sell in different markets. Eight are from Eunorau (eunorau-ebike.com, a US store pricing in dollars, $1,699 to $3,999, with 'from' prices on three of them) and two are from DYU (dyucycle.com, which prices in euros and ships to EU countries only: the M20 and the UX BMX at €899 each). Prices checked Oct 22 and 23, 2026 are not comparable across the two currencies. Start with the drive. Two Eunorau bikes use twin hub motors, the FAT-AWD 2.0 (two 500W) and the Defender S 2.0 (two 750W, 1,500W combined), while the other six list mid-drive motors, which sit at the pedals. The DYU bikes list 250W motors. Listed weights run from 61.7 lbs (URUS 2.0) to 89.3 lbs (Defender S 2.0) at Eunorau, against 40 kg for the M20 and 57 lbs for the UX BMX.
Battery energy is volts times amp-hours in watt-hours (Wh). Eunorau's 48V packs are 15Ah (720 Wh) on the FAT-AWD 2.0, FAT-HD 2.0 and FAT-HS, 17Ah (816 Wh) on the Defender S 2.0, 17.5Ah (840 Wh) on the Specter-ST, Specter S 4.0 and URUS, and 25Ah (1,200 Wh) on the FAT-HD 1.0 Pro. DYU lists 48V 18.2Ah (874 Wh) on the M20 and 48V 13Ah (624 Wh) on the UX BMX. Range figures are the stores' own, with no test method, and several assume a second battery: the FAT-HD 2.0 lists up to 80 miles with two, and the Defender S 2.0 up to 80 miles with two against 40 miles with one. The M20 page gives 100 miles in its header and spec list but 100 km with pedal assist and 70 km with the throttle in its technical table.
Eunorau's FAQ defines Class 1 as pedal assist only, Class 2 as throttle to 20 mph and Class 3 as pedal assist to 28 mph, and says laws vary by state and country. Several labels conflict with that. The FAT-HS header says Class 3 and its table lists a 28 mph maximum, but it also lists a thumb throttle. The URUS 2.0 header says Class 3 while its table gives a 20 mph maximum. The FAT-HD 2.0 lists Class 2 beside a 28 mph maximum, the Defender S 2.0 a Class 2 startup up to 20 mph with a setting up to 28 mph, and the Specter S 4.0 a default Class 2 with a display limit up to 28 mph. The M20 page says city street riding is prohibited yet also says it can navigate busy city streets, and one DYU spec list names UL 2849, a US standard, while its page mentions neither CE nor EN 15194.
Eunorau's terms apply to its eight bikes. E-bikes ship free by FedEx or UPS to the lower 48 states from Las Vegas warehouses, after 1 to 3 business days of processing and an estimated 5 to 7 days in transit; Hawaii, Alaska and other countries need a +$500 option. A return must be applied for within 7 calendar days of receipt, and the bike must be new, unassembled and unridden, in its original packaging; you pay the shipping back, although the terms page says shipping is charged only once. The warranty covers manufacturing defects only: 10 years on the frame and 24 months on the battery, motor and electronics.
DYU's terms apply to the M20 and UX BMX. Its shipping page names 24 EU countries, not Germany, and a cart test on Oct 22, 2026 returned no rate for a German, UK, US, Swiss or Norwegian address; delivery is free over EUR 100, an estimated 3 to 5 business days, though the Terms of Service say it may take up to 50 days. The return page gives 30 days for a bike in its original packaging with under 10 km on the display, and deducts EUR 200 per e-bike for a change of mind, while the Terms of Service give 7, 10 and 30-day rules. The warranty page gives one year, with a replacement frame only, while product pages show a '12-24 Months Warranty' banner. No independent test of the UX BMX turned up in the review's searches, so its own page is the only source of figures.
| Review | Price | Motor | Battery | Range | Weight |
|---|---|---|---|---|---|
| Eunorau Defender S 2.0 Dual-Motor E-Bike | $2,799 | Dual 48V 750W hub motors, 1,500W combined rated power, 85 N.m | 48V 17Ah removable lithium-ion, charging approximately 6-8 hours | Up to 40 miles, or up to 80 mi with a second battery, per the store | Net weight 89.3 lb; maximum payload 300 lb including rider and cargo |
| Eunorau FAT-HS Mid-Drive Fat-Tire E-Bike | $3,449 | 48V1000W Bafang M615 mid motor, 160 N.m torque | 48V15Ah standard; a second battery is optional | — | 77.1 lbs on the specification table |
| Eunorau FAT-AWD 2.0 Dual-Motor E-Bike | From $1,699 | Front 48V/500W plus rear 500W hub motors, MAX 110 N.m | 48V 15Ah LG lithium-ion; a second 15Ah battery is optional | — | Step-over 81.5 lbs, step-thru 79.4 lbs |
| Eunorau FAT-HD 1.0 Pro Fat-Tire E-Bike | From $1,999 | 48V 1000W BAFANG brushless mid motor, 160 N.m torque | 48V/25Ah; the page says it was upgraded from 16.5Ah | Up to 60 Miles, the store's own figure | 78.7 lbs on the specification table |
| Eunorau FAT-HD 2.0 Fat-Tire E-Bike | From $2,399 | BAFANG 1000W mid motor, 160 N.m torque | 48V 15Ah with Samsung cells; 2nd 15Ah optional | Up to 80 miles with dual batteries, per the store | 81.57 lbs on the specification list |
| Eunorau Specter-ST 2.0 Step-Through E-Bike | $2,999 | 48V1000W Bafang M620 mid motor, 160 N.m torque, torque sensor | Main 48V17.5Ah; an optional second battery is listed | — | 88lbs on the specification table |
| Eunorau Specter S 4.0 Full-Suspension E-Bike | $3,799 | BAFANG G510 mid-drive motor, 48V / 1,000W | 48V 17.5Ah removable downtube battery with LG cells | Up to 40 miles; up to 52 mi combined with the optional battery, per the page | Net weight 83.7 lbs / 38 kg |
| Eunorau URUS 2.0 Mid-Drive E-Bike | $3,999 | 48V 500W BAFANG M600 mid-drive, up to 120 N.m torque | 48V 17.5Ah removable lithium-ion with Samsung cells | Up to 40-65 miles, the store's own figure | Approximately 61.7 lbs / 28 kg; maximum payload 300 lbs / 136 kg |
| DYU UX BMX 20-Inch Fat Tire E-Bike | €899 | 250W | 48V 13Ah removable, per the spec list | Up to 100km per the page; no test conditions given | 57 lbs on the spec list; a feature bullet says 26 kg |
| DYU M20 All-Terrain Electric Bike | €899 | 250W rated, 1000W peak, per the spec list | 48V 18.2Ah; 7-8 h charging per the technical table | 100 miles on the spec list; 100km assist or 70km throttle in the technical table | 40kg net weight; aluminum frame; not foldable |
A hub motor sits in a wheel; a mid-drive sits at the pedals and drives the chain. Eunorau's FAT-AWD 2.0 lists two 500W hub motors with 110 N.m, and the Defender S 2.0 two 750W hubs with 85 N.m. Its mid-drive Bafang motors list 160 N.m on the FAT-HD 1.0 Pro, FAT-HD 2.0, Specter-ST and FAT-HS, and up to 120 N.m on the URUS 2.0; the Specter S 4.0 page lists no torque. N.m measures turning force.
Multiply volts by amp-hours. Eunorau lists 48V 15Ah (720 Wh), 17Ah (816 Wh), 17.5Ah (840 Wh) and 25Ah (1,200 Wh). DYU lists 48V 18.2Ah (about 874 Wh) on the M20 and 48V 13Ah (624 Wh) on the UX BMX. The FAT-HD 1.0 Pro page says its 25Ah pack was upgraded from 16.5Ah.
The pages give only the stores' own figures. Eunorau lists up to 60 miles (FAT-HD 1.0 Pro), 40 to 65 miles (URUS 2.0), up to 40 miles (Specter S 4.0) and up to 40 miles on the Defender S 2.0, or 80 with a second battery. DYU lists up to 100 km on the UX BMX, and the M20 says 100 miles in one place and 100 km with pedal assist (70 km with the throttle) in another. None gives a test method.
Eunorau's FAQ defines Class 1 as pedal assist only, Class 2 as throttle to 20 mph and Class 3 as pedal assist to 28 mph. Its labels here are Class 2 or Class 3 and several conflict with a listed throttle or speed: the FAT-HS says Class 3 with a thumb throttle, and the URUS 2.0 says Class 3 beside a 20 mph maximum. Laws vary by state and country, so check local rules.
The shipping page names 24 EU countries and prices are in euros. Germany is not on the list, and a cart test on Oct 22, 2026 returned no shipping rate for a German, UK, US, Swiss, Norwegian or Vietnamese address, while French, Spanish and Italian addresses got free delivery in an estimated 3 to 5 business days.
Eunorau gives 7 calendar days from receipt to apply, for a new, unassembled, unridden bike in its original packaging, with return shipping at your cost. DYU's return page gives 30 days for a bike in its original packaging with under 10 km on the display, and deducts EUR 200 per e-bike if you change your mind; its Terms of Service describe 7, 10 and 30-day rules, so ask which applies.