Ariel Rider Kepler High-Step vs Rad Power Bikes Radster Trail LargeKepler High-Step vs Radster Trail Large
Both checked Sep 2026 against manufacturer pages
Key differences
What actually differs
Same 750W motor.
Weight
Rad Power Bikes is 21 lb lighter
Ariel Rider
98.6 lb
Rad Power Bikes
78 lb
Total load
Ariel Rider carries 30 lb more
Ariel Rider
400 lb
Rad Power Bikes
370 lb
Rider plus cargo.
Rider limit
Only Rad Power Bikes publishes one
Ariel Rider
Not published
Rad Power Bikes
290 lb
We can't confirm Ariel Rider's rider limit.
Battery
Ariel Rider has 44% more
Ariel Rider
1,040 Wh
Rad Power Bikes
720 Wh
Top speed
Rad Power Bikes is 8 mph faster
Ariel Rider
20 mph
Rad Power Bikes
28 mph
Rad Power Bikes is outside Class 1–2.
Verdict
Which one for you
- Easiest to lift or carryRad Power Bikes Radster Trail Large21 lb lighter overall.
- Heavier ridersRad Power Bikes Radster Trail LargeThe only one with a published rider limit (290 lb). Ariel Rider allows more total load but doesn't say how much of it can be the rider.
- Longest ridesAriel Rider Kepler High-StepLarger battery. Both range claims are the brand's, not tested.
- Easiest to get onRad Power Bikes Radster Trail LargeLowest step-over: 24″ vs 25.7″.
Full specs
Side by side
SpecAriel Rider Kepler High-StepRad Power Bikes Radster Trail Large
Fit
Step-over height
25.7″
24″Better
Rider height
5′1″–5′11″
5′7″–6′4″
Seat height
Minimum 32 in, Maximum 39.6 in
From ground: 31.5" - 39" (80 - 99 cm); From pedal bottom stroke: 27" - 35" (69 - 89 cm)
Rider limit
Not published by brand
290 lbBetter
Total load
400 lbBetter
370 lb
Motor
Rated power
750W
750W
Peak power
1,940W
Not published by brand
Torque
118 NmBetter
100 Nm
Battery
Capacity
1,040 WhBetter
720 Wh
Voltage and amp-hours
52V · 20Ah
—
Range and speed
Claimed range
50-75 miBetter
Estimated 25-65 miles per charge
Top speed
20 mph
28 mph
E-bike class
Class 2 or 3
Class 2
Size and folding
Weight
98.6 lb
78 lbBetter
Wheels
24"
27.5"
Brakes and drivetrain
Brakes
4-piston hydraulic, 203mm (front + rear), motor-cutoff levers
Rad Power Bikes approved hydraulic disc brakes; brake pads Tektro semi-metallic…
Gears
Shimano Altus 8-speed, 13-32T
1x8 speed (Shimano 8-speed derailleur, Shimano 8-speed thumb shifter, 8-speed…
Comfort and safety
Suspension
Air-spring fork, hydraulic lockout + rebound, 100mm travel, 15mm thru-axle; suspension…
Hydraulic suspension fork, 80mm travel, tapered steerer tube, thru axle
Certifications
UL 2849 + UL 2271 ('Certified in accordance with UL 2849 / UL 2271')
UL Certified to UL 2849 and UL 2271
List price
Price
$1,699Better
$1,999
"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.