Unbox & Build the Sixthreezero EZ Transit Fat Tire Folding E-Trike: A Complete Assembly Guide

The Sixthreezero EZ Transit Fat Tire Folding Electric Trike is one of the most thoughtfully engineered compact e-trikes on the market. Combining a 750-watt hub motor, 16-inch by 4-inch fat tires, and a collapsible frame, it manages to deliver both portability and trail-capable performance in a single package. Whether you’re planning to store it in an apartment, load it into a vehicle, or simply want a nimble ride that can handle varied terrain, the EZ Transit is built to accommodate.

But like most electric trikes, arriving at that first ride requires some assembly. The EZ Transit ships in a single box via standard FedEx or UPS ground delivery, with most major components pre-installed to simplify the process. This guide walks through every step of unboxing and assembling the EZ Transit — from cutting the first zip tie to taking it for a test ride — in clear, practical terms.

If you’re a visual learner, Sixthreezero’s assembly video covers each stage in real time alongside this written walkthrough. Either way, expect to spend roughly 45 minutes to an hour completing the full build, depending on your comfort level with tools.

What to Expect When Your EZ Transit Arrives

The EZ Transit arrives in a single cardboard box measuring 40 inches wide, 30 inches front-to-back, and 26 inches tall from the ground. With all packaging materials included, the total shipping weight runs approximately 80 pounds. The box is designed to ship via standard ground carriers, so no freight or specialty delivery is required — it arrives at your door like any other package.

Before beginning assembly, gather a few basic tools. Most of what you’ll need is likely already in a standard home toolkit:

• Snips, box cutter, or sharp scissors

• 15 mm box wrench or ratchet set

• 10 mm wrench

• 5 mm and 6 mm Allen keys (hex wrenches)

• 4 mm Allen key

• A floor pump with a Schrader valve attachment for inflating the tires

The trike ships with its own multi-tool (a compact folding Allen key set) included in the box, which is genuinely useful for tight spaces during the fender installation. That said, having your own set of wrenches and ratchets will make the job faster and easier.

Opening the Box and Identifying the Components

Begin by cutting the straps securing the outer box, then carefully open the lid. The box is stapled shut, so take care when pulling back the flaps to avoid scratching your arm or hand on the edges.

The EZ Transit is packed tightly to keep the overall box dimensions as compact as possible, so a bit of unpacking is required before you can begin. Working from the top down, here is what you’ll encounter:

1. Rear fenders (2 pieces): Located at the very top. These are optional components — if you want to reduce the overall width or weight of the trike, you can set them aside and skip installation.

2. Seat: Secured with a zip tie. Cut the tie and set the seat aside for later installation.

3. Front wheel: Bundled with additional zip ties that will need to be cut before removal.

4. Stem: The handlebar stem, which may shift during shipping. Set it nearby for later installation.

5. Front and rear baskets: Packed together inside a larger basket. Pull both out and set them aside.

6. Accessory box: Contains the charger, assembly manual, axle cap, and pedals. The charger is an essential component — do not discard the box without confirming it is included.

Once the top layers are removed, go through the remaining contents and cut all remaining zip ties. This is important: the frame ships folded, and it cannot be unfolded until all zip ties securing it are removed.

Removing the Trike from the Box

There are two practical approaches to getting the trike out of the box, depending on whether you have a second person available:

• Garage door method: Score a slit on each of the two front bottom corners of the box, allowing the front panel to fold down like a ramp. The trike can then be rolled or wheeled straight out. This approach is ideal for solo assembly and also preserves the box for future use — just tape the slits back up afterward.

• Lift-out method: With two people, simply lift the trike out from above. Use the rear cross beam and the basket mounting area as grip points. This is the safer approach if the box sides are intact and you have help available.

Once the trike is out, locate the battery keys — they will be hanging on the cables. Remove them and set them somewhere safe before beginning assembly.

Unfolding and Locking the Frame

The EZ Transit ships with its frame folded, which is what allows it to fit into such a compact box — and what makes it so practical for transport and storage in everyday use. Before any other assembly steps, the frame needs to be unfolded and locked into its riding position.

Locate the quick-release mechanism at the frame’s fold point. It may have shifted during shipping and appear to be tucked in at an odd angle. Straighten it out to release the fold and give the frame freedom of movement.

With the quick release disengaged, lift the front section of the frame and push it back into the fully extended position. Note: the first time the frame is unfolded, it may feel stiff. This is normal — the joints will loosen with use and repeated folding and refolding.

To lock the frame in the open position:

7. Extend the frame fully until the hinge reaches its locked position.

8. Press up on the locking tab to allow the hinge to seat completely.

9. Insert the quick-release pin through the frame and tighten it firmly.

Once the frame is locked open and the quick release is tightened, the trike is stable enough to begin the remaining assembly steps.

Installing the Front Wheel

The front wheel comes with a bolt and washer pre-installed on the axle. These can remain in place during installation — simply slide them toward the end of the axle to get them out of the way before inserting the fork legs.

The front wheel uses a disc brake rotor, which must be carefully threaded through the brake caliper mounted on the fork. Here’s how to do it cleanly:

10. Hold the wheel upright with the rotor facing the fork.

11. Align the rotor with the gap between the brake pads inside the caliper.

12. Once the rotor is seated between the pads, lower the fork legs down onto the axle.

13. Hand-tighten the axle nuts to hold the wheel in place, then use a 15 mm wrench or ratchet to tighten fully.

The brakes come pre-adjusted from the factory, so the rotor should slide into the caliper without resistance. Do not force it — if there is significant drag, check the wheel alignment before proceeding.

Installing the Front Fender

Front fender installation requires temporarily removing the front light to create clearance for the fender mounting strut. The light is secured by a 5 mm Allen bolt on the front and a 10 mm nut on the rear.

Here is the installation sequence:

14. Loosen and remove the front light using the 5 mm Allen key and 10 mm wrench.

15. Slide the fender tab onto the fork bolt position.

16. Before tightening, route the fender strut carefully alongside the brake cable. The cable must not be kinked or pinched — this is critical to maintaining proper brake function.

17. Route the cable over the top of the strut if routing beside it creates a kink.

18. Reinstall the front light over the fender tab.

19. Tighten all bolts with the 5 mm Allen key and 10 mm wrench.

If the fender feels tight or crowded against the tire, try moving the mounting tab to the rearward position on the light bracket to gain a bit more clearance. Also ensure the fender is pushed as high as it will go before tightening, to maximize the gap between the fender and tire.

Installing the Handlebars and Headset

Handlebar installation requires attention to alignment. The stem has a small internal notch, and the handlebar post has a corresponding groove — these two features must mate correctly for the handlebars to seat properly. Take a moment before insertion to identify both the notch and groove, then align them before pushing the post in.

Follow this sequence for a clean, straight installation:

20. Insert the headset into the frame head tube and fold it down.

21. Insert the handlebar post into the stem, aligning the notch and groove.

22. Using a 6 mm Allen key, begin tightening the clamp bolt until light resistance is felt — stop here, do not fully tighten yet.

23. Fold the handlebars up into riding position. At this stage, they should still have a small amount of rotational play.

24. Sight down the stem and align the handlebars so they are perfectly centered with the front wheel.

25. Fold the stem down to lock the handlebar angle, then complete the final tightening with the 6 mm Allen key.

This two-stage tightening process — snug first, align, then fully tighten — is the key to getting perfectly straight handlebars without having to adjust them after the fact.

Installing the Front Basket

The front basket mounts to a bracket system on the front of the stem and is supported by a central strut that braces against the fork area. The hardware for this installation is included in its own small pack inside the accessory box.

Installation steps:

26. Remove the two mounting bolts from the bracket positions on the stem face.

27. Thread the basket mounting bracket screw through the bracket and position the basket at your preferred height. The bracket slot allows vertical adjustment, so take a moment to find the right fit before committing.

28. Hand-tighten the bracket on both sides without fully tightening, to keep adjustment flexibility.

29. Slide the support strut under the basket and position the silver securing piece over the top.

30. Thread the strut into place. It is threaded, but additional nuts can be added at the base for extra security — especially recommended if you plan to carry heavier loads.

31. Tighten the lower nuts with an 8 mm wrench, then return to the upper bracket bolts and tighten fully using a 10 mm wrench on the rear and a 5 mm Allen key on the front.

Installing the Rear Fenders

The rear fenders install directly to the rear frame using pre-installed bolts on the fenders themselves. As a reminder, this step is entirely optional — the fenders add some width to the trike and are worth skipping if you prioritize the most compact configuration.

If you choose to install them:

32. Remove any remaining packaging from the fenders.

33. Loosen the pre-installed bolts on the fender.

34. Align the fender mounting holes with the corresponding holes on the rear frame.

35. Insert the bolts and hand-tighten as much as possible before using a tool — this matters, as the clearance in the mounting area is tight.

36. Use the included multi-tool or a 5 mm Allen key to complete final tightening. The tight access makes a standard hex key or the compact multi-tool the most practical option here.

Installing the Rear Basket

The rear basket mounts to four cross beam struts on the rear frame. These struts arrive pre-bolted to the frame, and their bolts must be removed before the basket can be attached.

Installation steps:

37. Remove all four bolts from the cross beam struts using a 4 mm Allen key.

38. Position the basket on the rear rack with the latch opening in your preferred direction (ideally opening toward the rider for convenience).

39. Lay the mounting brackets flat against the bottom of the basket. The basket has a mesh base, so the bolts do not go through pre-drilled holes — they are pushed directly through the mesh. Locate the right spot and thread them through.

40. Install bolts on all four corners loosely first to allow for adjustment.

41. Confirm the basket is level and centered, then tighten all four bolts fully with the 4 mm Allen key.

Installing the Rear Tail Light

Tail light installation is one of the quickest steps in the entire build. The light mounts to the rear of the frame using two pre-threaded nuts.

42. Remove the two nuts from the rear mounting post.

43. Slide the tail light onto the post.

44. Reinstall and tighten the nuts with an 8 mm wrench until snug.

Installing the Pedals

Pedal installation is straightforward but requires attention to threading direction. The pedals are marked “R” (right) and “L” (left) — always install them on their corresponding sides.

The critical detail: both pedals tighten by rotating them forward relative to the crank arm. This means the right pedal (standard thread) tightens clockwise, while the left pedal (reverse thread) tightens counter-clockwise when viewed from the outside. In practice, for the left pedal, you will thread it on by turning it in the direction of forward rotation, which feels counter-intuitive the first time.

Hand-thread each pedal carefully to avoid cross-threading, then use a 15 mm box wrench to tighten both firmly. Pedals that are not tight can loosen under load — give them a solid torque.

Installing and Adjusting the Seat

The seat post slides directly into the seat tube. Height adjustment and clamping is handled by a quick-release lever at the top of the seat tube.

For the best clamping force:

45. Slide the seat post to your preferred height.

46. Before engaging the quick release, turn the adjustment knob on the non-lever side to add pre-tension.

47. Close the quick release lever. It should require noticeable resistance to close fully — that resistance indicates a proper clamp.

48. If the seat still moves after clamping, open the lever, increase the pre-tension on the knob slightly, and re-clamp.

Aim for a seat angle that feels parallel to the ground, or with a very slight forward tilt depending on personal preference.

Inflating the Tires

The EZ Transit runs 16-inch by 4-inch fat tires with a maximum recommended inflation pressure of 20 PSI, which is printed on the sidewall of each tire. Fat tires operate at much lower pressures than standard bicycle tires — do not over-inflate.

The valve stem is located on the side of the tire wall rather than on the inner rim — look for it there rather than in the center of the wheel. The tires use a standard Schrader valve, compatible with most floor pumps and gas station air compressors.

Pressure selection affects ride character:

• Lower pressure (15–18 PSI): Softer, more cushioned ride. Better for gravel, grass, or uneven terrain.

• Higher pressure (closer to 20 PSI): Firmer feel, slightly more rolling efficiency on pavement.

Most riders will find 16–18 PSI provides a comfortable balance for mixed-surface use.

Getting Familiar with the Controls

With assembly complete, it’s worth spending a few minutes understanding the controls before heading out. The EZ Transit has a full suite of features accessible from the handlebar display and controls, and knowing how each one works will make the first ride significantly smoother.

Powering On the Trike

The battery has a power switch located on the side of the battery unit itself. This switch must be turned on before the trike’s display or motor will respond to any inputs. Once the battery is switched on, press and hold the power button on the handlebar display to power up the system.

The display shows:

• Battery charge level

• Current speed (miles per hour)

• Motor output (watts)

• Distance traveled

• Ambient temperature

Pedal Assist Levels

Pedal assist levels are adjusted using the up and down arrow buttons on the display. Higher assist levels draw more power from the motor and provide greater riding ease, while lower levels require more physical effort from the rider and extend battery range.

Using the Throttle

The EZ Transit features a thumb throttle on the right side of the handlebars, allowing motor-powered movement without pedaling. Treat it like a vehicle accelerator — ease into it smoothly rather than snapping it back and forth. Abrupt throttle inputs create an uneven ride experience and put unnecessary stress on the drivetrain.

Drive and Reverse Mode

One of the EZ Transit’s standout features is its built-in reverse gear — especially useful in tight spaces. A dedicated switch on the handlebar toggles between drive and reverse modes. To use reverse:

49. Flip the drive/reverse switch to the reverse position.

50. Engage the thumb throttle.

51. Pedal backward simultaneously to assist the motor.

Reverse mode is low-speed by design and is meant for maneuvering, not extended reverse travel.

Gear Shifting

The EZ Transit includes a multi-speed gear system controlled by a shifter on the right handlebar. Only shift gears while actively pedaling — shifting under zero-pedal conditions can damage the derailleur or cause the chain to skip.

Parking Brakes

The EZ Transit has parking brakes on both sides, activated by pulling the brake lever and engaging a flip lock on the lever body. This keeps the trike stationary on slopes or uneven ground when parked. Always engage the parking brakes when stopping on any incline.

Handlebar Height Adjustment

The handlebars can be raised or lowered via a quick-release clamp on the stem to accommodate different rider heights. Adjust before riding, find the position that allows a comfortable, slightly relaxed arm angle, and tighten the clamp securely before moving.

Battery Management and Charging

The EZ Transit’s battery is integrated into the frame and secured with the included key. The charging port is located adjacent to the battery’s power switch. To charge:

52. Open the charging port cover.

53. Plug in the included charger.

54. The charger indicator light will confirm active charging.

To remove the battery for charging separately or for storage, insert the key, turn to unlock, and slide the battery out of the housing. Always store the keys in a consistent, easy-to-remember location.

Troubleshooting: Electrical Connections

If something electrical is not functioning after assembly — the display isn’t powering on, the motor isn’t responding, or a light isn’t working — the first place to check is the cable connections near the handlebars.

Several electrical connectors run through the handlebar and stem area, and one or more of these may have separated slightly during shipping or during the folding and unfolding process. Each connector snaps together and should produce a firm click when fully seated. Inspect all visible connectors, push any loose ones together until they click, and test the system again before assuming a deeper issue.

This simple check resolves the majority of post-assembly electrical issues.

Why the EZ Transit Stands Out Among Compact Electric Trikes

Most folding electric trikes make significant compromises to achieve portability — smaller motors, narrower tires, reduced cargo capacity. The EZ Transit takes a different approach. Its 750-watt rear hub motor delivers genuine hill-climbing power, while the 16-inch by 4-inch fat tires provide the kind of stability and all-surface traction typically associated with much larger full-size trikes.

The folding frame, meanwhile, collapses to a size manageable enough for an SUV cargo area, a storage closet, or a small garage. That combination — real power, wide tires, compact form factor — is genuinely uncommon in the current e-trike market.

The inclusion of both front and rear baskets is also notable. Many e-trikes offer one or the other as a standard feature; having both means the EZ Transit can carry a meaningful amount of cargo right out of the box, without requiring aftermarket add-ons.

Additional standout features include:

• Reverse gear: Essential for navigating tight turnarounds, parking spaces, and small indoor environments.

• Parking brakes: A practical safety feature that standard bicycles don’t have and that becomes important as soon as you stop on any kind of slope.

• Multi-gear drivetrain: The ability to shift gears gives the rider more range over varied terrain, extending the usable riding envelope beyond what a single-speed trike can manage.

• Removable battery: Convenient for riders who cannot easily position the trike near a power outlet at home.

• Disc brakes: More reliable stopping power than rim brakes, particularly in wet conditions.

Who Is the EZ Transit Best Suited For?

The EZ Transit’s design makes it a strong fit for several specific rider profiles:

• Riders with limited storage space: Apartment dwellers, condo residents, and anyone without a dedicated garage will appreciate the ability to fold and store the trike in a compact footprint.

• Travelers and RV owners: The EZ Transit’s folding capability and relatively compact shipping dimensions make it one of the more practical e-trikes to transport to a destination and ride upon arrival.

• Riders who want trail access without a full-size trike: The fat tire configuration handles hard-packed trails, gravel paths, and grass surfaces that would challenge a standard narrow-tired trike.

• Errands and light cargo use: With front and rear baskets installed, the EZ Transit is a capable grocery or errand runner that doesn’t require any additional modifications.

• Riders who need reverse capability: For anyone with limited mobility or who regularly parks in constrained spaces, the integrated reverse gear is a meaningful practical advantage.

Full Assembly Checklist at a Glance

Use this list to verify every step has been completed before the first ride:

55. All zip ties cut and removed

56. Frame unfolded and quick-release tightened

57. Front wheel installed and axle nuts tightened (15 mm)

58. Brake rotor seated correctly in caliper

59. Front fender installed with brake cable routed cleanly (optional)

60. Handlebars installed, aligned, and tightened

61. Front basket mounted and support strut secured

62. Rear fenders installed (optional)

63. Rear basket mounted and bolts tightened

64. Tail light installed

65. Pedals installed on correct sides and tightened (15 mm)

66. Seat installed and quick-release clamped firmly

67. Tires inflated to 16–20 PSI

68. Battery switch turned on

69. Display powers on successfully

70. All electrical connectors confirmed seated

71. Battery keys stored in a known location

72. Charger located and confirmed included

Ready to Ride

With the checklist complete, the EZ Transit is ready for its first ride. Take a few minutes in a quiet open area to get comfortable with the throttle response, pedal assist levels, and the feel of the fat tires before venturing onto busier paths or trails. The wide wheelbase provides excellent stability, and the fat tires have a naturally confidence-inspiring feel underfoot.

For riders new to electric trikes generally, the most important early habit to develop is smooth, gradual throttle application — the 750-watt motor is powerful enough to feel sudden acceleration if the thumb throttle is engaged abruptly. A gentle, progressive squeeze gets the best results and the most comfortable ride.

Questions about the assembly process or the EZ Transit’s features can be directed to the Sixthreezero team directly at sixthreezero.com, or by phone at (310) 982-2877. The support team is available to help with any step of the process, from first unboxing through ongoing maintenance.

The EZ Transit Fat Tire Folding Electric Trike is available at sixthreezero.com.