Revolutionary 2025 E-Bike Features Advanced Vehicle Detection Technology
The 750W rear-mounted hub motor produces 90 Nm of torque, effortlessly conquering challenging inclines and substantial cargo loads. An integrated torque sensor provides seamless, whisper-quiet pedal assistance through five progressive levels, ensuring effortless navigation whether ascending or maintaining cruising speed. Combined with twist throttle operation and maximum velocities reaching 28 mph in Class 3 configuration, this system delivers substantial performance for demanding applications.
Rad Power Bikes advertises 19–60+ mile operational range per charging cycle on the RadRunner MAX. Extended journey capabilities are enhanced through the optional Range Extender battery that mounts beneath the rear cargo platform, expanding total range beyond 120 miles.
The incorporated rear radar technology monitors approaching vehicles within 100-meter detection zones, displaying real-time proximity information on the comprehensive color screen while tracking incoming automobile traffic. The intelligent taillight system activates warning flashes to alert approaching drivers. Additional safety equipment includes 450-lumen low-beam/750-lumen high-beam headlights, directional turn signals, and hydraulic disc braking systems, creating comprehensive visibility and protection during heavy traffic conditions.
Supporting 420-lb total payload capacity and 120-lb rear rack specifications, the Max efficiently transports groceries, equipment, or passenger loads with comfort through its cushioned saddle and 80mm suspension fork for smooth operation. Over 330 available accessory configurations—including baskets, seating options, or pannier systems—enable customization for specific user requirements.
Product Specifications Overview
Manufacturer: Rad Power Bikes
Model Designation: RadRunner MAX
Retail Price: $2,299
Recommended Applications: Recreation, Commuting, Utility
Electric Bicycle Classification: Class 1, 2 and 3
Warranty Coverage: 2-Year Warranty
Market Release: April 2025
Production Year: 2025
Electrical System Specifications
Motor Configuration: Rear Hub Design
Motor Power Output: 750W watts
Motor Torque Rating: 90Nm Newton meters
Battery Voltage: 48V volts
Battery Capacity: 14Ah amp hours
Battery Energy Storage: 672Wh watt hours
Display System: Color Display Technology
Information Readouts: Speed, Odometer, Trip Distance, PAS Level, Battery Level, Remaining Range, Headlight Indicator and Approaching Vehicle Radar Indicator
Assistance Modes: PAS 1 through 5
Maximum Velocity: 28 MPH (45 kph)
Mechanical Component Details
Complete Weight: 82 lbs (37.19 kg)
Battery Mass: 10 lbs (4.54 kg)
Frame Construction: Aluminum
Rider Height Range: 4' 11" - 6' 2"
Geometry Configuration: One Size
Frame Material: Aluminum
Color Option: Deep Emerald Green
Front Fork Specifications: Coil Spring, 34mm Stanchions, Thru-Axle with lockout feature
Mounting Points: Front Rack, Bottle Cage, Rear Rack and Fenders
Transmission Details: 8-Speed Shimano RD-RX817 GRX Di2 Derailleur, Shimano CS-M8000 11-42 Tooth Cassette
Shifting System: Shimano Trigger Shifters
Crank Arms: 170mm Alloy Crank Arms
Pedal Type: Aluminum Flat Pedals
Stem Configuration: 50 mm + 30º (35 mm rise)
Handlebar Specifications: Aluminum, 28" (71.1 cm) wide
Braking System: 2-Piston Caliper, 180mm Rotor with 2.3mm Thickness
Grip Design: Lock-on ergonomic comfort grips
Saddle Configuration: Rad Branded - Padded for comfort
Seat Post Material: Alloy - 390mm
Seat Post Dimensions: 390mm length, 27.2mm diameter
Wheel Diameter: 20" (50.8cm)
Tire Specifications: 20x3" Rad Branded tire with puncture protection and reflective stripe Multi-surface tread pattern
Standard Equipment: Rear Rack, Fenders
Available Accessories: RadRunner Range Extension, RadRunner Passenger Kit, Passenger Bars, Rearview Mirror, GUB PRO-3 Phone Mount, Large Front Mounted Basket, Fat Tire Wheel Lock, RadRunner Console Storage
Comprehensive Performance Analysis
The RadRunner Max represents Rad Power Bikes' newest utility e-bike advancement featuring three distinct trim configurations, launching at $2,299 with objectives of providing riders versatility, performance capabilities, and innovative technological features. Engineered to substitute automobile transportation, this Deep Emerald Green machine delivers 28 mph Class 3 maximum speed, 420-lb payload capacity, and advanced features including rear radar detection and Apple Find My integration.
Extensive testing over one week involved comprehensive evaluation of range capabilities, handling characteristics, and practical utility applications to determine if performance matches manufacturer claims. From urban commuting scenarios to recreational weekend excursions, this analysis examines the RadRunner MAX's position within the current e-bike marketplace.
Personal Riding Experience Assessment
The RadRunner Max arrives in a single color configuration: Deep Emerald Green. This metallic dark green finish incorporates subtle metallic flaking that captures ambient light, creating a refined, contemporary appearance without excessive flashiness. The open frame architecture provides practical advantages, simplifying maintenance procedures. Cable and component access remains straightforward without internal routing complications, benefiting DIY repairs or upgrade installations. This represents clean, functional aesthetics matching its workhorse characteristics.
Rad Power Bikes offers one frame dimension, accommodating riders measuring 4'11" through 6'2". At 5'11" height, the fit proved generally comfortable, featuring a surprisingly cushioned saddle suitable for extended rides. The 20" x 3.5" tires, operated at approximately 20 PSI (maximum 30 PSI) for enhanced cushioning, effectively absorbed road impacts, though this configuration slightly reduced range and efficiency—a worthwhile trade-off for improved comfort. The 80mm suspension fork with 34mm stanchions and thru-axle maintains front-end rigidity and responsiveness, smoothing rough pavement or light gravel surfaces. However, the fixed stem positioned arms lower than optimal, manageable but noticeable. For taller riders approaching 6'2", this could prove more pronounced, especially with elevated seatpost positions, potentially straining reach or posture. Riders at the upper height range should carefully test fit compatibility.
The 750W rear hub motor, producing 90 Nm of torque, represents a standout feature. Combined with torque sensor technology, it delivers smooth, quiet, and natural-feeling power that adapts to pedaling effort. Whether climbing steep inclines or hauling heavy loads, the motor and 8-speed gearing (11-34T cassette) handle tasks confidently, making it well-suited for the Max's utility focus. The bicycle offers four operational modes: Class 1 (20 mph, pedal-assist only), Class 2 (20 mph, throttle or pedal), Class 3 (28 mph, pedal-assist), and California-compliant Class 3 (25 mph). The throttle proves useful for quick starts or heavy load situations, though the torque sensor's responsiveness made pedaling feel intuitive across five assistance levels. This represents powerful, reliable configuration for varied tasks, from urban commutes to cargo transportation.
Advanced Technology Integration
The RadRunner Max's technology distinguishes it significantly, particularly for safety-conscious riders. The lighting system provides robust functionality: 450-lumen low-beam/750-lumen high-beam LED headlight with adjustable angle and automatic ambient sensors, plus rear LED taillight with turn signals activated via control pad.
The premier feature involves rear radar technology, integrated into the taillight, scanning traffic up to 100 meters behind. When vehicles approach, the color display shows animation with the vehicle's relative speed (e.g., a car at 35 mph approaching you at 15 mph displays as 20 mph) and shrinking meter indicating proximity. This reduces constant shoulder checking or mirror reliance, decreasing rider anxiety. The brake light also flashes to alert drivers, even with lights deactivated, adding visibility. This represents intelligent, practical systems for mixed-traffic environments.
For security purposes, the bicycle includes keyed battery lock and key fob for proximity unlocking. Alternatively, startup PIN code locks controls, with guest mode for sharing temporary access—excellent for family or friend lending. The built-in Apple Find My integration enables location tracking via iPhone, useful for monitoring during errands, supervising children, or aiding recovery if stolen. While not foolproof, these layers provide decent peace of mind for utility e-bikes.
The RadRunner Max operates like solid, versatile workhorse, blending comfort, power, and innovative technology for urban riders or cargo haulers. The radar and security features represent genuine standouts, addressing real-world requirements, while the motor and suspension create capable all-around performance. However, the fixed stem could present fit issues for taller riders, and tire pressure trade-offs for comfort slightly impact efficiency.
The RadRunner Max performs like dependable workhorse, feeling stable and planted on roadways, with 420-lb payload capacity that equips it for efficient daily task handling. It operates smoothly, powerfully, and quietly—representing significant advantages.
Range Performance Testing
Manufacturer Estimated Range: 19 to 60 miles
Real World Testing Results:
- PAS 1 Range Test: [Not completed]
- PAS 5 Range Test: 34 miles
Rad Power Bikes estimates 19 to 60+ miles per charge with its 672 Wh battery paired to 750W motor. Testing involved demanding local rides, operating exclusively in PAS 5—maximum pedal-assist setting—for genuine stress testing of limitations. Over nearly two hours of riding, covering 34 miles before battery depletion occurred.
This represents respectable results for aggressive usage, suggesting the bicycle can handle sustained high-output scenarios, including heavy cargo or hilly commutes, without premature power loss. Based on this testing, conservative settings like PAS 1 or 2 could approach Rad's 60-mile claim, especially for lighter riders or flatter terrain.
For extended requirements, Rad offers Range Extender accessory, a second battery mounting discreetly under the rear rack, claiming to boost total range to 120+ miles. While this add-on wasn't tested, it represents practical option for long-distance riders or delivery workers, though adding cost and slight weight.
The battery itself provides user-friendly operation, with keyed lock for security and easy removal for charging. Charging requires approximately 6–7 hours with included 2A charger, standard for e-bikes in this classification. Overall, the Max's range represents strong performance, offering flexibility for most daily requirements—whether running errands or tackling extended rides—with the extender as bonus for heavy users. Real-world range depends on riding habits, so adjust expectations accordingly.
Power System Analysis
A 750W rear hub motor with 90 Nm torque powers the Max, easily managing acceleration and steep climbing. The torque sensor ensures smooth, quiet, and natural pedal assistance, representing Rad strength. Five modes—Class 1 (20 mph, pedal-assist), Class 2 (20 mph, throttle/pedal), Class 3 (throttle limited to 20 MPH and pedal assist to 28 mph), Class 3 Limited (25 mph), and California Compliant Class 3. Regarding PAS levels, options include PAS levels 0 to 5 or 1 to 5 if preferring constant level 1 assistance. Throttle on the MAX utilizes right-side mounted twist throttle alongside grip.
The 48V, 14 Ah (672 Wh) UL 2271-certified battery claims 19–60+ mile range. It's semi-integrated, removable, with physical key security. Rad's Safe Shield technology encases each cell in thermal barriers, adding fire safety by preventing thermal runaway if cells overheat—appreciated features more brands should adopt. Charging requires 6–7 hours. Range Extender (sold separately) claims 120+ miles.
The motor's power and smooth torque sensor make the Max capable for varied tasks, while Safe Shield battery adds valuable safety. The range of modes suits different riders based on local laws, representing beneficial configuration.
Component Specifications
The Components on the RadRunner MAX maintain straightforward design themes of the overall bicycle.
Beginning with drivetrain, the RadRunner MAX features 8-Speed Shimano Altus derailleur and 11-34t cassette connected to 50T chain ring with 170mm cranks and flat pedals. This combination represents effective 'do-it-all' gear setup with sufficient range for tackling everything from flat cruising to steeper hill climbing.
Braking utilizes Gemma Hydraulic Disc Brakes. Both front and rear wheels feature 2-Piston calipers and 180mm rotors with 1.8mm thickness. While braking with this setup proves sufficient without issues stopping the MAX, preference would favor 4-Piston caliper setup for enhanced braking on bicycles weighing 80 lbs with 420 lb payload. However, this represents preference more than necessity as braking performs adequately as shipped.
The Rad-branded saddle appears padded and narrow, but padding quality proves exceptional and surprisingly comfortable. These details become apparent during extended riding sessions with range testing. For the RadRunner MAX, the saddle represents excellent selection.
Regarding comfort, the remaining comfort package on the MAX includes 3.5" wide tires and suspension fork that combine for smooth riding. The higher volume that 3.5" wide tires provide assists with cushioning while 80mm travel from coil fork handles significant impacts. Rad's use of thru-axle on front fork provides solid, yet easily removable method for securing front wheel.
In the cockpit, the 28-inch wide alloy handlebar contains all ride controls for the MAX. Both ends feature lock-on rubber grips and alloy Gemma brake levers. Left side includes PAS and display control pad along with bell, and right side features Shimano trigger shifters and twist throttle.
Display Interface and Technology Integration
The full-color display features clear menus and sharp interface, making speed, battery, or trip statistics easily readable, even in sunlight conditions. USB-C port enables phone or GPS charging, essential for extended rides or city street navigation. The display and PAS buttons also control rear turn signals, which illuminate from taillight. Screen icon shows activation status, but manual deactivation is required—unlike automotive systems, they won't stop blinking automatically, potentially confusing drivers or consuming battery if forgotten.
The exceptional feature, as previously noted, involves taillight's hidden radar, detecting cars up to 100 meters behind. The display presents meter that shrinks as cars approach, plus speed differential (such as car at 35 mph to your 15 mph showing as 20 mph). The taillight flashes to alert drivers, even with lights deactivated, boosting safety for riders and drivers by reducing shoulder checking and increasing traffic visibility.
No Rad Power Bikes application exists. Instead, the Max features built-in AirTag that pairs with iPhones through Apple's Find My network. Location tracking capabilities prove excellent for monitoring during store visits, supervising children's rides, or locating if stolen. Synchronization occurs directly to phone without additional applications.
Technology Assessment
The display's sharp appearance, USB-C port, and radar alerts prove extremely practical, with radar representing significant advancement for safer riding. Forgetting to deactivate turn signals presents minor inconvenience, and AirTag tracking proves useful but remains Apple-exclusive.
Model Configuration Options
One frame size accommodates riders from 4'11" to 6'2". At 5'11" height, comfort proved adequate, but fixed stem felt slightly low, as noted earlier, and taller individuals around 6'2" should verify fit since seatpost adjusts upward but stem remains fixed. The step-through frame simplifies mounting and dismounting, especially when hauling gear or passengers, remaining sturdy enough for the bicycle's 420-lb payload.
Regarding frame colors, one choice exists: Deep Emerald Green. This represents attractive metallic dark green with subtle flake that highlights in light, creating sharp, modern appearance without excessive loudness. Unfortunately, alternative color preferences aren't accommodated currently.
The Max arrives ready with complete front and rear fenders to prevent mud and rain exposure, essential for year-round commuting or wet-weather riding. Dual-leg center kickstand stabilizes the bicycle, even when loaded with cargo, and handlebar-mounted bell provides quick pedestrian alerting. The integrated rear rack, rated for 120 lbs, enables hauling—groceries, work equipment, or children's seats. LED lighting (450-lumen low/750-lumen high headlight, rear taillight with turn signals) and radar are standard, enhancing safety for nighttime or traffic-heavy riding, as covered in Display section.
Rad offers several optional accessories for customizing RadRunner Max according to specific needs, though these weren't tested. Range Extender battery (mounting under rear rack) provides claimed 120+ mile range. Cargo options including baskets, panniers, or platforms expand hauling capacity for errands or work. Passenger seats or foot pegs enable family-friendly operation, while handlebar bags or phone mounts cater to daily practical requirements.
Value Assessment and Purchase Recommendation
The $2,299 RadRunner Max value proposition requires careful consideration. Extensive testing revealed solid performance characteristics. At 5'11" height, the bicycle felt comfortable with sharp Deep Emerald Green finish, plush saddle, and step-through frame enabling easy mounting, even with equipment.
The 750W motor and torque sensor handle hills and heavy loads effectively, achieving 34 miles in PAS 5 stress testing—likely approaching 60 miles on lower settings. The radar taillight, turn signals, and AirTag tracking enhance safety and bicycle security, while 420-lb payload and 330+ accessory options create capable platform for commutes, errands, or child transportation.
Performance isn't flawless. Single frame sizing, coupled with fixed stem positioning proved slightly low, and riders approaching 6'2" on the high-end fit range should test compatibility. For those seeking powerful, technologically advanced e-bike for city riding or cargo applications, the Max excels, especially with radar technology. Verify fit if tall and plan for extras like Range Extender for extended trips. Overall, the RadRunner MAX represents solid utility e-bike with complete practicality for daily life and capability for demanding applications, in clean package serving many riders effectively for years.
Advantages and Limitations
Key Strengths
The innovative traffic radar system increases safety and traffic awareness, keeping drivers and riders informed for smoother daily commuting.
The powerful 750W motor with 90 Nm torque handles flat terrains with speed and climbs steeper hills effortlessly.
Multiple security features including custom pin codes, guest mode, proximity key fob, and built-in AirTag for GPS tracking and theft protection.
Impressive range at claimed 60+ miles, with optional extender kit doubling capacity to 120+ miles.
Enhanced 2.3mm thick brake rotors improve braking performance, pad life, and cooling, extending brake longevity.
Five riding modes, including Class 1, 2, 3 (up to 28 MPH), Class 3 (limited to 25 MPH) and California-compliant Class 3 mode.
Rad's choice to use 34mm stanchions on suspension fork provides stiff, responsive front end for better control on the RadRunner MAX.
Notable Limitations
At 5' 11" height, reach felt slightly low and without adjustable stem, consideration required if approaching 6' 2" rider fit range maximum.
Only one frame size and single color option might exclude some potential buyers.
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