Rad Power Bikes · Cargo & utility
Rad Power Bikes RadRunner Max: real range, hills and charging
A 180 lb rider on the Rad Power Bikes RadRunner Max at 16 mph with relaxed pedaling over rolling hills (±2%) on pavement can expect about 35 miles per charge (28–42 mi), using 17.4 Wh per mile. The brand claims up to 125 miles. That is about 28% of the claim. On throttle only over hills it drops to about 25 miles.
672
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 RadRunner Max 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 19–125 miles (estimated 19-61+ miles per charge (feature text says 65 mi); 125+ mi with range extender and second battery, sold separately).
| Rider weight | Easy 12 mph | Everyday 16 mph | Fast 20 mph | Throttle, hills |
|---|---|---|---|---|
| 150 lb | 56 mi (45–67) | 36 mi (29–44) | 26 mi (20–31) | 27 mi (22–33) |
| 200 lb | 50 mi (40–60) | 34 mi (27–40) | 24 mi (19–29) | 24 mi (19–28) |
| 250 lb | 45 mi (36–54) | 31 mi (25–38) | 23 mi (18–28) | 21 mi (17–25) |
| 300 lb | 41 mi (33–49) | 29 mi (23–34) | 22 mi (17–26) | 19 mi (15–23) |
- 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 RadRunner Max climb hills?
Highest steady speed on each grade, motor at an estimated 1,200 W peak, limited by its 90 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 | 9 mph |
| 180 lb, pedaling | 21 mph | 14 mph | 10 mph |
| 250 lb, throttle | 18 mph | 10 mph | 7 mph |
| 250 lb, pedaling | 19 mph | 11 mph | 8 mph |
Steepest grade at 8 mph (180 lb): 18% 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
0.37¢
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
35
mi · 100% cap.
50°F
32
mi · 94% cap.
32°F
28
mi · 85% cap.
20°F
24
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 RadRunner Max
Rad Power Bikes RadRunner Max specs
From the Rad Power Bikes product page, checked 2026-10-20. est. marks values Rad Power Bikes doesn't confirm.
- Price
- $2,299
Source note
Only one color (Deep Emerald Green) listed
- Class
- Class 1/2/3, throttle
- Top assisted speed
- 28 mph
- Battery
- 672 Wh (48 V × 14 Ah), removable, dual-battery option
- Motor
- 750 W nominal, rear hub
Source note
Rad: stated wattage is rated capacity; actual power-to-ground is under 750W
- Torque
- 90 Nm
Source note
Spec table and feature text say 90 Nm; Shopify product description says '100 Nm torque sensor'
- Pedal sensor
- Torque
- Claimed range
- 19–125 mi (Estimated 19-61+ miles per charge (feature text says 65 mi); 125+ mi with Range Extender and second battery, sold separately)
- Weight
- 82 lb with battery
Source note
72 lb without battery
- Max load
- 420 lb rider + cargo
Source note
275 lb max rider; rear rack 120 lb
- Wheels & tires
- 20" × 3.5"
- Frame
- Aluminum step-thru cargo/utility, 80mm suspension fork, 8-speed, rear radar; 20x3.5 tires
- Charger
- 2 A
- Safety certification
- UL 2849 + UL 2271 (spec table: tested by ACT for compliance)
Common questions
What is the weight limit of the Rad Power Bikes RadRunner Max?
Rad Power Bikes rates the RadRunner Max for 420 lb total (rider plus cargo). At 300 lb it still goes about 29 miles in everyday riding.
Can the Rad Power Bikes RadRunner Max climb steep hills?
On throttle alone, with a 180 lb rider, it can hold 8 mph up a grade of about 18% (our estimate from its 1200 W estimated peak power and 90 Nm). With moderate pedaling, about 20%. On a 10% hill it holds about 13 mph on throttle.
How long does the Rad Power Bikes RadRunner Max 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 0.37¢ per mile.
Is the Rad Power Bikes RadRunner Max a Class 2 or Class 3 e-bike?
Rad Power Bikes lists it as Class 1/2/3, 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 RadRunner Max?
At 82 lb with battery (about 74 lb without it) and 3.5" tires, 8 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 with battery removed |
| Hollywood Racks Sport Rider for Electric Bikes | 80 lb/bike | Fits with battery removed |
| Hollywood Racks RV Rider E-Bike Rack | 80 lb/bike | Fits with battery removed |
| Aventon Hitch Rack | 77 lb/bike | Fits with battery removed |
Doesn't fit: Thule Epos 2-bike (tires too wide), Yakima StageTwo (too heavy), Hollywood Racks Destination E (too heavy), Allen Sports High Capacity Locking Premier for Electric Bikes (too heavy), Kuat Piston Pro X 2-bike (too heavy), Yakima OnRamp (tires too wide), Thule EasyFold XT 2 (tires too wide), 1UP USA Heavy Duty Double (tires too wide), 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 (tires too wide), Saris SuperClamp G4 2-Bike (too heavy), Hollywood Racks Sport Rider SE2 (tires too wide), Saris Freedom G2 2-Bike (tires too wide).
All hitch racks →
