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Addmotor Grandtan X vs Addmotor Soletri II M-366X Herotri II M-365X (high-step)Grandtan X vs Soletri II M-366X Herotri II M-365X (high-step)

Both checked Sep 2026 against manufacturer pages
+ Add a third model
AddmotorAddmotor
Grandtan X
Model page Where to buy Remove Addmotor Grandtan X
AddmotorAddmotor
Soletri II M-366X Herotri II M-365X (high-step)
Model page Where to buy Remove Addmotor Soletri II M-366X Herotri II M-365X (high-step)
Key differences

What actually differs

Same 750W motor.
Weight
Addmotor is 2 lb lighter
Addmotor
128 lb
Addmotor
130 lb
Total load
Addmotor carries 90 lb more
Addmotor
360 lb
Addmotor
450 lb
Rider plus cargo.
Rider limit
Addmotor allows 70 lb more
Addmotor
280 lb
Addmotor
350 lb
The most the rider alone can weigh.
Verdict

Which one for you

  • Easiest to lift or carry
    Addmotor Grandtan X
    2 lb lighter overall.
  • Heavier riders
    Addmotor Soletri II M-366X Herotri II M-365X (high-step)
    Highest published rider limit (350 lb).
  • Easiest to get on
    Addmotor Grandtan X
    Lowest step-over: 17.5″ vs 24″.
Full specs

Side by side

SpecAddmotor Grandtan XAddmotor Soletri II M-366X Herotri II M-365X (high-step)
Fit
Step-over height
17.5″Better
24″
Rider height
5′2″–6′4″
5′2″–6′2″
Seat height
32.5"-39"
32.5"
Rider limit
280 lb
350 lbBetter
Total load
360 lb
450 lbBetter
Seats
1 rider
—
Motor
Rated power
750W
750W
Peak power
1,400W
Not published by brand
Torque
90 Nm
Not published by brand
Battery
Capacity
960 Wh
~960 Wh
Voltage and amp-hours
48V · 20Ah
48V · 20Ah
Range and speed
Claimed range
40-85 miles (85 miles PAS1)
85 miles (PAS1)
Top speed
20 mph
20 mph
E-bike class
Not published by brand
Class 2 (not stated by brand)
Size and folding
Folds
No
No
Folded size
Doesn't fold
Doesn't fold
Weight
128 lbBetter
130 lb
Wheels
24" front / 20" rear
20"
Brakes and drivetrain
Brakes
Mechanical disc brake
Tektro Aries mechanical disc, 180mm rotors, motor inhibitors
Parking brake
Yes
Yes
Gears
Shimano Tourney TY300 7-speed, 14-32T
Shimano Altus 7-speed (1x7, 14-28T cassette)
Rear differential
Yes
Yes
Comfort and safety
Suspension
Oil spring front fork 80mm travel + rear shock absorber
Full suspension: ADDSHOX 20" dual-crown oil spring fork, 80mm travel + rear suspension…
Certifications
UL 2271 (battery)
UL 2271 (battery)
List price
Price
$2,899
$2,599Better

"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.