Rad Power Bikes · Cargo & utility · discontinued
Rad Power Bikes RadWagon 4: real range, hills and charging
A 180 lb rider on the Rad Power Bikes RadWagon 4 at 16 mph with relaxed pedaling over rolling hills (±2%) on pavement can expect about 38 miles per charge (30–46 mi), using 15.9 Wh per mile. The brand claims up to 45 miles. That is about 85% of the claim. On throttle only over hills it drops to about 26 miles. It is discontinued; Rad Power Bikes' current successor is the Rad Power Bikes RadWagon 5 ($2,399), about 40 miles in the same riding.
See the Rad Power Bikes RadWagon 5 range · Check price at Rad Power Bikes
672
Wh battery
750
W motor
20
mph max
Price checked 2026-10-23. We may earn a commission.
How far does the Rad Power Bikes RadWagon 4 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 25–45 miles (brand estimate 25-45+ miles per charge).
| Rider weight | Easy 12 mph | Everyday 16 mph | Fast 20 mph | Throttle, hills |
|---|---|---|---|---|
| 150 lb | 64 mi (51–77) | 40 mi (32–48) | 27 mi (22–33) | 28 mi (23–34) |
| 200 lb | 58 mi (46–69) | 37 mi (30–45) | 26 mi (21–31) | 25 mi (20–30) |
| 250 lb | 52 mi (42–63) | 33 mi (27–40) | 25 mi (20–30) | 22 mi (17–26) |
| 300 lb | 48 mi (38–57) | 30 mi (24–36) | 24 mi (19–28) | 20 mi (16–24) |
- 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
Independent range tests
Reviewers rode the RadWagon 4 until the battery died. Our model, run in the same conditions (180 lb rider assumed; testers don't publish weight), is shown next to each result.
highest assist · 16 mph avg
27.9 mi
measured by Electric Bike Report · 24.1 Wh/mi
Our model: 38 mi (30–46) outside band
Can the Rad Power Bikes RadWagon 4 climb hills?
Highest steady speed on each grade, motor at an estimated 1,200 W peak, limited by its 65 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 | 20 mph | 13 mph | 10 mph |
| 180 lb, pedaling | 20 mph | 14 mph | 10 mph |
| 250 lb, throttle | 18 mph | 11 mph | 8 mph |
| 250 lb, pedaling | 19 mph | 12 mph | 8 mph |
Steepest grade at 8 mph (180 lb): 19% on throttle, 20% 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 14 min
With a 5 A charger
3 h 6 min
Cost per full charge
$0.14
Cost per mile
0.34¢
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
38
mi · 100% cap.
50°F
35
mi · 94% cap.
32°F
31
mi · 85% cap.
20°F
26
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 RadWagon 4
Rad Power Bikes RadWagon 4 specs
From the Rad Power Bikes product page, checked 2026-10-23. est. marks values Rad Power Bikes doesn't confirm.
- Price
- $1,799
Source note
US list price $1,799 (sale $1,299, Out of Stock) on archived page 2026-05-31; page 404 by 2026-08-31 and not in the radpowerbikes.com US catalog checked 2026-10-23 (replaced by the new Safe Shield 'RadWagon' at $1,799). Battery is covered by CPSC's 2025-11-24 stop-use warning. web.archive.org
- Class
- Class 2, throttle
Source note
- Top assisted speed
- 20 mph
Source note
- Battery
- 672 Wh (48 V × 14 Ah), removable
Source note
- Motor
- 750 W nominal, rear hub
Source note
- Torque
- 65 Nm
Source note
- Pedal sensor
- Cadence
- Claimed range
- 25–45 mi (Brand estimate 25-45+ miles per charge)
Source note
- Weight
- 76.7 lb with battery
Source note
- Max load
- 350 lb rider + cargo
Source note
Rear rack 120 lb. web.archive.org
- Wheels & tires
- 22" × 3"
- Frame
- Aluminum longtail cargo frame, one size, 1x7-speed
- Charger
- 2 A
Source note
- Safety certification
- UL 2849
Common questions
What is the weight limit of the Rad Power Bikes RadWagon 4?
Rad Power Bikes rates the RadWagon 4 for 350 lb total (rider plus cargo). At 300 lb it still goes about 30 miles in everyday riding.
Can the Rad Power Bikes RadWagon 4 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 65 Nm). With moderate pedaling, about 20%. On a 10% hill it holds about 13 mph on throttle.
How long does the Rad Power Bikes RadWagon 4 take to charge?
About 6 h 14 min from empty with the 2 A charger, or about 3 h 6 min with a 5 A fast charger. A full charge costs about $0.14 at the US average of 18.31¢/kWh, or 0.34¢ per mile.
Is the Rad Power Bikes RadWagon 4 a Class 2 or Class 3 e-bike?
Rad Power Bikes lists it as Class 2, with a top assisted speed of 20 mph and a throttle.
Which hitch racks fit the RadWagon 4?
At 76.7 lb with battery (about 69 lb without it) and 3" tires, 12 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 with battery removed |
| 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 |
Doesn't fit: Kuat Piston Pro X 2-bike (too heavy), 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 (wheel size out of range).
All hitch racks →
