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Rad Power Bikes RadRunner Plus vs Urtopia Carbon JoyRadRunner Plus vs Carbon Joy

Both checked Sep 2026 against manufacturer pages
+ Add a third model
Rad Power Bikes RadRunner Plus
Rad Power BikesRad Power Bikes
RadRunner Plus
Model page Where to buy Remove Rad Power Bikes RadRunner Plus
Urtopia Carbon Joy
UrtopiaUrtopia
Carbon Joy
Model page Where to buy Remove Urtopia Carbon Joy
Key differences

What actually differs

Weight
Urtopia is 18 lb lighter
Rad Power Bikes
75 lb
Urtopia
56.8 lb
Total load
Rad Power Bikes carries 20 lb more
Rad Power Bikes
350 lb
Urtopia
330 lb
Rider plus cargo.
Rider limit
Only Rad Power Bikes publishes one
Rad Power Bikes
275 lb
Urtopia
Not published
We can't confirm Urtopia's rider limit.
Battery
Rad Power Bikes has 18% more
Rad Power Bikes
624 Wh
Urtopia
529.2 Wh
Verdict

Which one for you

  • Easiest to lift or carry
    Urtopia Carbon Joy
    18 lb lighter overall.
  • Heavier riders
    Rad Power Bikes RadRunner Plus
    The only one with a published rider limit (275 lb).
  • Longest rides
    Rad Power Bikes RadRunner Plus
    Larger battery. Both range claims are the brand's, not tested.
  • Easiest to get on
    About even
    16.2″ vs 16.5″ step-over.
Full specs

Side by side

SpecRad Power Bikes RadRunner PlusUrtopia Carbon Joy
Fit
Step-over height
16.5″
16.2″Better
Rider height
4′11″–6′2″
5′1″–6′1″
Seat height
From ground: 30.5" - 41" (77.5 - 104.1 cm); From pedal bottom stroke: 26" - 37.5" (66…
Max Seat Height 1010 mm(40’’) ; Min Seat Height 770 mm(30’’)
Rider limit
275 lbBetter
Not published by brand
Total load
350 lbBetter
330 lb
Motor
Rated power
750W
500W
Peak power
Not published by brand
750W
Torque
60 NmBetter
50 Nm
Battery
Capacity
624 WhBetter
529.2 Wh
Voltage and amp-hours
—
36V · 147Ah
Range and speed
Claimed range
Estimated 17-55+ miles per charge
Up to 65 milesBetter
Top speed
20 mph
20 mph
E-bike class
Class 2
Class 2 or 3
Size and folding
Folds
Not published by brand
No
Folded size
Not published by brand
Doesn't fold
Weight
75 lb
56.8 lbBetter
Wheels
20"
20"
Brakes and drivetrain
Brakes
Gemma Hydraulic GA-950E; rotors 180mm x 1.8mm, 6 bolt
TEKTRO Hydraulic Disc Brakes with Power Cut-Off Sensor
Gears
7 speed (Shimano 7 speed thumb shifter, 7 speed 11-34T)
Shimano Altus 8-speed ; 12-32T, 8 Speed
Comfort and safety
Suspension
Exsho suspension fork, 65mm
50mm travel Aluminum suspension fork with preload adjustment
Certifications
Certified by to UL2849 by ACT Labs
UL 2849 ; UL 2271 Certified
List price
Price
$1,799Better
$1,899

"Better" marks the stronger figure where one clearly exists. Range and battery claims are the brand's own. "~" means we calculated it. "—" means we haven't checked it yet. Sources and any conflicting figures are on each model page.