Super73 · Fat tire
Super73 ZX: real range, hills and charging
A 180 lb rider on the Super73 ZX at 16 mph with relaxed pedaling over rolling hills (±2%) on pavement can expect about 29 miles per charge (23–35 mi), using 15 Wh per mile. The brand claims up to 35 miles. That is about 82% of the claim. On throttle only over hills it drops to about 20 miles.
480
Wh battery
500
W motor
20
mph max
Price checked 2026-10-20. We may earn a commission.
How far does the Super73 ZX go for your weight?
Miles per full charge on a new battery at 70°F on pavement, no wind. Each number is the middle of a ±20% band. Super73 claims 25–35 miles (25+ mi at 20 mph under class 2 throttle-only; varies with rider weight, speed, temperature, wind, tire pressure, terrain, incline).
| Rider weight | Easy 12 mph | Everyday 16 mph | Fast 20 mph | Throttle, hills |
|---|---|---|---|---|
| 150 lb | 47 mi (38–56) | 30 mi (24–37) | 21 mi (17–26) | 22 mi (17–26) |
| 200 lb | 41 mi (33–49) | 28 mi (22–33) | 20 mi (16–24) | 18 mi (15–22) |
| 250 lb | 36 mi (29–44) | 25 mi (20–30) | 19 mi (15–23) | 16 mi (13–19) |
| 300 lb | 33 mi (26–39) | 22 mi (18–27) | 18 mi (14–21) | 14 mi (11–17) |
- Easy 12 mph: 12 mph, relaxed pedaling, flat
- Everyday 16 mph: 16 mph, relaxed pedaling, rolling hills
- Fast 20 mph: 20 mph, relaxed pedaling, rolling hills
- Throttle, hills: 15 mph, no pedaling, hilly
Can the Super73 ZX climb hills?
Highest steady speed on each grade, motor at an estimated 800 W peak. A 10% grade is a steep city street; 15% is a hard hill.
| Rider | 5% grade | 10% grade | 15% grade |
|---|---|---|---|
| 180 lb, throttle | 16 mph | 10 mph | 7 mph |
| 180 lb, pedaling | 18 mph | 11 mph | 8 mph |
| 250 lb, throttle | 14 mph | 8 mph | 5 mph |
| 250 lb, pedaling | 15 mph | 9 mph | 6 mph |
Steepest grade at 8 mph (180 lb): 12% on throttle, 14% with moderate pedaling. Peak power lasts for short hills; on long climbs motors fall back toward their 500 W nominal rating.
Charging time and cost
Empty to full (2 A)
4 h 44 min
With a 5 A charger
2 h 30 min
Cost per full charge
$0.10
Cost per mile
0.32¢
US average residential electricity, 18.31¢/kWh (EIA, July 2026), 85% charger efficiency. Charge time: constant current to ~85%, then about an hour of top-off.
Range in cold weather
70°F
29
mi · 100% cap.
50°F
26
mi · 94% cap.
32°F
23
mi · 85% cap.
20°F
20
mi · 75% cap.
Everyday scenario, 180 lb rider. Capacity loss is temporary; store and charge the battery indoors and never charge it below freezing.
Simulate your own ride on the ZX
Super73 ZX specs
From the Super73 product page, checked 2026-10-20. est. marks values Super73 doesn't confirm.
- Price
- $2,395
- Class
- Class 2, throttle
Source note
Sold in Class 2 mode; Super73 says app pairings after 2025-01-01 cannot access other modes
- Top assisted speed
- 20 mph
- Battery
- 480 Wh (48 V × 10 Ah), removable
Source note
UL2271-compliant battery. Removable battery and cadence (not torque) pedal sensing assumed; not stated on official spec table
- Motor
- 500 W nominal, rear hub
- Torque
- Not published est.
Source note
Not stated on official page
- Pedal sensor
- Cadence
- Claimed range
- 25–35 mi (25+ mi at 20 mph under Class 2 throttle-only; varies with rider weight, speed, temperature, wind, tire pressure, terrain, incline)
- Weight
- 62 lb with battery
- Max load
- 325 lb rider + cargo
Source note
Rider weight limit (no separate total payload stated)
- Wheels & tires
- 20" × 4.5"
- Frame
- Moped-style aluminum, rigid, single speed, mechanical brakes; 20in VEE LZRD tires 4.5in front / 5in rear
- Charger
- Not published (we assume 2 A) est.
Source note
Charger amps not stated; official charge time 5 hrs
- Safety certification
- UL 2271 (battery)
Common questions
What is the weight limit of the Super73 ZX?
Super73 rates the ZX for 325 lb total (rider plus cargo). At 300 lb it still goes about 22 miles in everyday riding.
Can the Super73 ZX climb steep hills?
On throttle alone, with a 180 lb rider, it can hold 8 mph up a grade of about 12% (our estimate from its 800 W estimated peak power). With moderate pedaling, about 14%. On a 10% hill it holds about 10 mph on throttle.
How long does the Super73 ZX take to charge?
About 4 h 44 min from empty with the 2 A charger, or about 2 h 30 min with a 5 A fast charger. A full charge costs about $0.10 at the US average of 18.31¢/kWh, or 0.32¢ per mile.
Is the Super73 ZX a Class 2 or Class 3 e-bike?
Super73 lists it as Class 2, with a top assisted speed of 20 mph and a throttle.
Which hitch racks fit the ZX?
At 62 lb with battery (about 57 lb without it) and 4.5" tires, 16 of 23 hitch racks we track can carry it (some only with the battery removed).
| Kuat Piston ION 2-bike | 100 lb/bike | Fits |
| 1UP USA Super Duty Double | 100 lb/bike | Fits |
| Saris MHS 2 Bike Package | 100 lb/bike | Fits |
| Aventon Hitch Rack Pro | 85 lb/bike | Fits |
| Yakima OnRamp LX | 80 lb/bike | Fits |
| Hollywood Racks Sport Rider for Electric Bikes | 80 lb/bike | Fits |
| Hollywood Racks RV Rider E-Bike Rack | 80 lb/bike | Fits |
| Aventon Hitch Rack | 77 lb/bike | Fits |
| Yakima StageTwo | 70 lb/bike | Fits |
| Hollywood Racks Destination E | 70 lb/bike | Fits |
| Allen Sports High Capacity Locking Premier for Electric Bikes | 70 lb/bike | Fits |
| Kuat Piston Pro X 2-bike | 67 lb/bike | Fits |
| Thule T2 Pro XTR 2-bike | 60 lb/bike | Fits with battery removed |
| Kuat NV 2.0 2-bike | 60 lb/bike | Fits with battery removed |
| Kuat NV Base 2.0 2-bike | 60 lb/bike | Fits with battery removed |
| Saris SuperClamp G4 2-Bike | 60 lb/bike | Fits with battery removed |
Doesn't fit: Thule Epos 2-bike (tires too wide), Yakima OnRamp (tires too wide), Thule EasyFold XT 2 (tires too wide), 1UP USA Heavy Duty Double (tires too wide), Saris Door County 2-Bike Motorized (tires too wide), Hollywood Racks Sport Rider SE2 (tires too wide), Saris Freedom G2 2-Bike (tires too wide).
All hitch racks →
