Rad Power Bikes · Commuter & cruiser
Rad Power Bikes Radster Road: real range, hills and charging
A 180 lb rider on the Rad Power Bikes Radster Road at 16 mph with relaxed pedaling over rolling hills (±2%) on pavement can expect about 45 miles per charge (36–54 mi), using 14.3 Wh per mile. The brand claims up to 65 miles. That is about 70% of the claim. On throttle only over hills it drops to about 29 miles.
720
Wh battery
750
W motor
28
mph max
Price checked 2026-10-20. We may earn a commission.
How far does the Rad Power Bikes Radster Road 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. Rad Power Bikes claims 25–65 miles (rad's estimate, no conditions).
| Rider weight | Easy 12 mph | Everyday 16 mph | Fast 20 mph | Throttle, hills |
|---|---|---|---|---|
| 150 lb | 80 mi (64–97) | 49 mi (39–59) | 34 mi (27–41) | 32 mi (26–39) |
| 200 lb | 72 mi (57–86) | 43 mi (34–52) | 32 mi (26–39) | 28 mi (22–33) |
| 250 lb | 64 mi (52–77) | 38 mi (31–46) | 31 mi (25–37) | 24 mi (20–29) |
| 300 lb | 59 mi (47–70) | 35 mi (28–42) | 29 mi (23–35) | 22 mi (17–26) |
- 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 Rad Power Bikes Radster Road climb hills?
Highest steady speed on each grade, motor at an estimated 1,200 W peak, limited by its 100 Nm of torque. A 10% grade is a steep city street; 15% is a hard hill.
| Rider | 5% grade | 10% grade | 15% grade |
|---|---|---|---|
| 180 lb, throttle | 21 mph | 13 mph | 10 mph |
| 180 lb, pedaling | 22 mph | 14 mph | 11 mph |
| 250 lb, throttle | 19 mph | 11 mph | 8 mph |
| 250 lb, pedaling | 20 mph | 12 mph | 8 mph |
Steepest grade at 8 mph (180 lb): 19% on throttle, 21% with moderate pedaling. Peak power lasts for short hills; on long climbs motors fall back toward their 750 W nominal rating.
Charging time and cost
Empty to full (2 A)
6 h 36 min
With a 5 A charger
3 h 15 min
Cost per full charge
$0.16
Cost per mile
0.31¢
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
45
mi · 100% cap.
50°F
42
mi · 94% cap.
32°F
37
mi · 85% cap.
20°F
33
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 Radster Road
Rad Power Bikes Radster Road specs
From the Rad Power Bikes product page, checked 2026-10-20. est. marks values Rad Power Bikes doesn't confirm.
- Price
- $1,999
- Class
- Class 1/2/3 (ships Class 2), throttle
- Top assisted speed
- 28 mph
- Battery
- 720 Wh (48 V × 15 Ah), removable
- Motor
- 750 W nominal, rear hub
- Torque
- 100 Nm
- Pedal sensor
- Torque
- Claimed range
- 25–65 mi (Rad's estimate, no conditions)
- Weight
- 75 lb with battery
Source note
Rad's page lists both 74.5 and 75 lb
- Max load
- 320 lb rider + cargo
Source note
Rider max 290 lb
- Wheels & tires
- 29" × 2.2"
- Frame
- High-step or step-thru
- Charger
- 2 A
- Safety certification
- UL 2849 (e-bike system) + UL 2271 (battery)
Common questions
What is the weight limit of the Rad Power Bikes Radster Road?
Rad Power Bikes rates the Radster Road for 320 lb total (rider plus cargo). At 300 lb it still goes about 35 miles in everyday riding.
Can the Rad Power Bikes Radster Road climb steep hills?
On throttle alone, with a 180 lb rider, it can hold 8 mph up a grade of about 19% (our estimate from its 1200 W estimated peak power and 100 Nm). With moderate pedaling, about 21%. On a 10% hill it holds about 13 mph on throttle.
How long does the Rad Power Bikes Radster Road take to charge?
About 6 h 36 min from empty with the 2 A charger, or about 3 h 15 min with a 5 A fast charger. A full charge costs about $0.16 at the US average of 18.31¢/kWh, or 0.31¢ per mile.
Is the Rad Power Bikes Radster Road a Class 2 or Class 3 e-bike?
Rad Power Bikes lists it as Class 1/2/3 (ships Class 2), with a top assisted speed of 28 mph and a throttle. Class 3 speeds (up to 28 mph) are limited to pedal assist; on throttle, Class 2 rules cap it at 20 mph.
Which hitch racks fit the Radster Road?
At 75 lb with battery (about 67 lb without it) and 2.2" tires, 13 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 |
| Thule Epos 2-bike | 75 lb/bike | Fits |
| Yakima StageTwo | 70 lb/bike | Fits with battery removed |
| Hollywood Racks Destination E | 70 lb/bike | Fits with battery removed |
| Allen Sports High Capacity Locking Premier for Electric Bikes | 70 lb/bike | Fits with battery removed |
| Kuat Piston Pro X 2-bike | 67 lb/bike | Fits with battery removed |
Doesn't fit: Yakima OnRamp (too heavy), Thule EasyFold XT 2 (too heavy), 1UP USA Heavy Duty Double (too heavy), Thule T2 Pro XTR 2-bike (too heavy), Kuat NV 2.0 2-bike (too heavy), Kuat NV Base 2.0 2-bike (too heavy), Saris Door County 2-Bike Motorized (too heavy), Saris SuperClamp G4 2-Bike (too heavy), Hollywood Racks Sport Rider SE2 (too heavy), Saris Freedom G2 2-Bike (too heavy).
All hitch racks →Spare battery and charger
- Safe Shield Advanced Semi-Integrated Battery (15 Ah) · 720 Wh$599
- Rad Battery Charger (MY2025) · 2 A$65
A second battery doubles range for long days; the simulator's custom mode lets you enter the combined watt-hours.
