Mars Plus ST Foldable Step-Through Utility Electric Bike
Best for:
- Commuters who need more utility
- Grocery runs and short car-trip replacement
- Apartment dwellers who need foldable storage
- Riders who want comfort, cargo, and convenience in one bike
Fast & Free Shipping
Shipped from the US warehouse, estimated delivery within 3-8 days
Warranty
All Actbest bikes are covered under our manufacturer's 1-year all-inclusive warranty for the original owner against all manufacturing defects (All free Accessories are not covered by warranty service).
Mars Plus ST Foldable Step-Through Utility Electric Bike
More Than a Folding Bike. Built for Cargo, Hills, and Everyday Life.
Carries More. Does More.
Mars Plus ST is built for riders who need more than a basic folding eBike. With an extended rear rack and up to 440 lb total load capacity, it gives you more room for groceries, work bags, delivery gear, picnic supplies, and weekend essentials.
It delivers the carrying flexibility of a utility eBike while staying easier to fold, store, and transport than a full-size cargo bike.
More Torque When the Ride Gets Real.
The 1800W peak motor delivers 110N·m of torque and 45%+ hill-climbing capability, giving the Mars Plus ST stronger support when starting with cargo, climbing neighborhood hills, or maintaining momentum on more demanding routes.
Whether you are riding through traffic, crossing bridges, climbing driveways, or taking a loaded weekend route, the added torque gives you stronger low-speed pulling power when you need it most.
Go Farther Between Charges.
The 48V 20Ah removable battery gives Mars Plus ST the range to handle daily commutes, errands, detours, and weekend rides. Ride to work, stop for groceries, visit friends, or take the long way home with more confidence between charges.
Remove the battery for convenient charging at home, in the garage, or at the office.
More Stability. More Grip. More Comfort.
The upgraded 20" x 4.0" fat tires help create a more planted ride feel, especially when carrying cargo or riding over uneven roads. The wider tire profile adds grip, balance, and cushion for city streets, gravel paths, grass, and light trails.
Compared with narrower folding eBike tires, the 4.0" fat tires give Mars Plus ST a more confident and comfortable ride across everyday surfaces.
Easy On. Easy Off.
The step-thru frame makes Mars Plus ST easier to get on and off, especially during stop-and-go city rides, grocery runs, and loaded trips.
Instead of swinging your leg over a high frame or loaded rear rack, the low-step design gives you easier access and more confidence before the ride even starts.
Fold It. Store It. Take It Anywhere.
Mars Plus ST folds down to make storage and transport easier after the ride. Keep it in a garage, apartment, SUV, RV, or tight storage space without giving up the utility you need for everyday hauling.
It gives you the carrying confidence of a utility eBike with the storage flexibility of a folding frame.
Features
Front Suspension for a Smoother Ride
The adjustable suspension front fork helps absorb bumps and reduce vibration from rough pavement, gravel, and uneven roads. Paired with 4.0" fat tires, it gives Mars Plus ST a smoother and more controlled ride feel.
A Smarter View of Every Ride
The upgraded color display makes key ride information easier to read at a glance, including speed, battery level, assist mode, mileage, and ride status. Stay informed and in control without taking focus away from the road.
Reliable Stopping Power
Disc brakes provide dependable stopping control for daily rides, loaded trips, and changing road conditions. Whether you are riding through city traffic or slowing down on a downhill route, Mars Plus ST helps keep braking responsive and controlled.
See Better. Be Seen Better
Integrated front and rear lights help improve visibility during early morning rides, evening commutes, and low-light conditions. Ride with more awareness whether you are commuting, running errands, or heading home after dark.
Shift Easily for Changing Roads.
The Shimano 7-speed drivetrain lets you adjust your pedaling effort for hills, flat roads, starts, and longer rides. Pair mechanical shifting with pedal assist for a more flexible riding experience.
Specification
Geometry
Rider Height
5'1''-6'2''
Maximum load
440LBS
Top Speed
32+MPH
- AWheelbase47.2“
- BTotal Length69.3“
- CHandlebar Height46.1“
- DMinimum Seat Height31.1“
- EMaximum Seat Height 40.16“
- FChain Stay Length19.7“
- GStep-Thru Height 15.35“
- IWheel Diameter20“
- JHandlebar Length 23.62“
- KRear Rack Height24.8“
- L Folded Dimensions (Length) 42.52"
- M Folded Dimensions (Height) 32.28"
- N Folded Dimensions (Width) 20.87"
What's In Box
1* Mars Plus ST Ebike
1* User Manual
1* Charger
2* Pedals
2* Keys
3*Open End Wrench 3*Tools 1*Phillips Head
1* Front wheel quick release
Hear From the Community
Product compare
Assembly instructions
How to Assemble
This short video will show you how to easily assemble your new electric bike. The video provides clear steps and helpful tips to assist you.
Please read our FAQs page to find out more.
Will the Mars Plus ST still climb well when I’m carrying cargo?
Yes. The 1800W peak motor and 110N·m of torque provide strong support when starting with extra weight or climbing everyday inclines. For steeper or longer climbs, shift into a lighter mechanical gear and use an appropriate pedal-assist level before the slope becomes more demanding.
Keep in mind that heavier loads can affect acceleration, braking distance, and battery range.
How should I use the Shimano gears and pedal assist together?
The Shimano 7-speed drivetrain controls how hard it feels to pedal, while PAS（Pedal Assist System）controls how much assistance the motor provides.
Use a lighter gear when starting or climbing, then shift into a higher gear as the road flattens and your speed increases. Matching the gear and assist level to the terrain can make pedaling feel more natural and help the motor work more efficiently.
Does the step-through frame really make a difference in daily use?
Yes. The low-step frame reduces how high you need to lift your leg when getting on or off the bike, which can be especially convenient during frequent stops, when carrying cargo, or when you simply want an easier mounting position.
For riders using the Mars Plus ST for errands and everyday trips, this can make repeated starts and stops more comfortable.
Is the Mars Folding Electric Bike for Adults suitable for both on-road and off-road use?
Yes, this adult electric bike is suitable for both on-road and off-road use, making it perfect for exploring different terrains.
Will carrying more weight reduce the 85-mile range?
Yes. The advertised up to 85 miles is based on ideal pedal-assist conditions. Rider weight, cargo load, hills, speed, assist level, throttle use, temperature, tire pressure, and riding habits can all affect real-world range.
If you regularly carry cargo or ride on hilly routes, expect range to be lower than the maximum figure.
How does the front suspension help on everyday roads?
The adjustable front suspension helps soften bumps and road vibrations from cracked pavement, speed bumps, gravel, and other uneven surfaces.
You’ll notice the benefit most when moving between smooth pavement and rougher sections, where the suspension works together with the wide fat tires to keep the front end more comfortable and controlled.
How should I store the battery when I’m not riding for a while?
Store the battery indoors in a cool, dry place away from direct sunlight, excessive heat, freezing temperatures, and moisture. Avoid leaving the battery completely discharged for long periods, and check its charge periodically during extended storage.
Always use the supplied or Actbest-recommended charger.
What should I check regularly on a folding fat-tire eBike?
Check tire pressure, brake response, wheel fasteners, drivetrain condition, battery connections, and the folding mechanism regularly. Before each ride, make sure the folding latch is fully secured and there is no unusual movement at the frame joint.
Keeping the tires properly inflated and the drivetrain adjusted can also improve ride quality and efficiency.