3-Wheel vs 4-Wheel Electric Forklift: 4 Questions That Decide It (With Real Turning Radii and Prices)
A 3-wheel electric forklift is the right buy when the aisle is the constraint: EKKO's 3-wheel trucks turn in 58.9 to 61 inches where its 4-wheel trucks need 86.2 to 88.9, per EKKO's spec pages, and the heaviest load stays at or under 4,000 lb on smooth concrete. A 4-wheel electric forklift is the right buy when the load goes past 4,000 lb, the truck works ramps, dock plates or yard pavement, or the aisles are already wide enough that the tighter turn buys nothing. On Warehouse Gear Hub, the 3-wheel EKKO EK16A-177 (3,500 lb, cushion tires) is $24,224.05, the 3-wheel lithium EK18AT-185Li (4,000 lb) is $34,579.05, the 4-wheel lithium EK20GT-Li (4,000 lb) is $31,919.05, and the 4-wheel EK25GT-Li (5,000 lb) is $34,579.05. Read that again: at 4,000 lb the 3-wheel truck costs $2,660.00 more, not less, and what you are paying for is 25.2 inches of turning radius. The four questions below take you from the aisle to the part number, with the stability question answered from OSHA's own Appendix A to 29 CFR 1910.178.
- Question 1: How narrow is the aisle where the truck has to turn?
- Question 2: What does the heaviest load weigh, and how high does it go?
- Question 3: Does the truck ever leave smooth, level concrete?
- Question 4: Is a 3-wheel electric forklift less stable than a 4-wheel?
- Which electric forklift should you buy?
- Frequently asked questions
Question 1: How narrow is the aisle where the truck has to turn?
This is the question the 3-wheel truck exists to answer. A 3-wheel counterbalanced forklift steers with one rear wheel (or a close pair under one pivot) set on the truck's centerline, so it turns around a point close to its own body. A 4-wheel truck steers with a full rear axle and needs a bigger circle. Per EKKO's page for the 3-wheel EK18AT-185Li, the minimum outside turning radius is 61 in on a 53.5 in wheelbase. Per EKKO's page for the 4-wheel EK20GT-Li, the same capacity truck turns in 86.2 in on a 63.7 in wheelbase. Same 4,000 lb rating at a 24 in load center, same 185 in mast, same 43.7 in free lift, same lithium chemistry, and a 25.2 in difference in the circle the truck sweeps.
The circle sets the aisle. Toyota's aisle width formula is "Basic Right Angle Stacking Width + Load Length + 12 Inches = Your Minimum Forklift Aisle Width," with the 12 inches there because it "will help to ensure you have enough space to accommodate your forklift's turn radius." EKKO publishes a turning radius rather than a right-angle stacking width, so use the radius as the floor and add a 48 in pallet and the 12 in clearance:
- EK16A-177 (3-wheel, 3,500 lb): 58.9 + 48 + 12 = 118.9 in, or 9 ft 11 in, before the fork-face allowance below.
- EK18AT-185Li (3-wheel, 4,000 lb): 61 + 48 + 12 = 121 in, or 10 ft 1 in.
- EK20GT-Li (4-wheel, 4,000 lb): 86.2 + 48 + 12 = 146.2 in, or 12 ft 2 in.
- EK25GT-Li (4-wheel, 5,000 lb): 88.9 + 48 + 12 = 148.9 in, or 12 ft 5 in.
Those are floors, not finished numbers. Toyota's European aisle guide spells out the term the US formula folds into its stacking width: x, "the horizontal distance from front wheel center to fork front," added to the turning radius, the load length and a 200 mm safety margin. EKKO does not publish x, so measure it on the truck (or ask us for it on the model you are quoting) and add it. What the floors do show is the gap: 25 to 30 inches of aisle, on every aisle in the building, in exchange for nothing on capacity at the 4,000 lb size. The 3-wheel truck is also 22 in shorter overall, 116.9 in against 138.9 in with forks, which is the difference between a clean turn at the end of a rack row and a three-point one.
| Model we stock | Capacity at 24 in | Turning radius | Overall width | Length with forks | Service weight | Battery | Tires | Price as listed |
|---|---|---|---|---|---|---|---|---|
| EKKO EK16A-177, 3-wheel, 177 in mast | 3,500 lb | 58.9 in | 42.1 in | 107.1 in | 5,200 lb | 24V / 320Ah lead-acid | Cushion | $24,224.05 |
| EKKO EK18AT-185Li, 3-wheel, 185 in mast | 4,000 lb | 61 in | 41.5 in | 116.9 in | 7,341 lb | 48V / 202Ah lithium | Solid pneumatic | $34,579.05 |
| EKKO EK20GT-Li, 4-wheel, 185 in mast | 4,000 lb | 86.2 in | 45.2 in | 138.9 in | 7,594 lb | 80V / 205Ah lithium | Solid pneumatic | $31,919.05 |
| EKKO EK25GT-Li, 4-wheel, 185 in mast | 5,000 lb | 88.9 in | 45.2 in | 141 in | 8,734 lb | 80V / 205Ah lithium | Solid pneumatic | $34,579.05 |
Every dimension in the table is from EKKO's product pages; prices are Warehouse Gear Hub's as of this writing. Note the width column: the 3-wheel trucks are 3 to 4 in narrower, and the 3,500 lb EK16A weighs 2,141 lb less than the 4,000 lb EK18AT, which matters on a mezzanine or a trailer floor with a posted limit.
61 in turning radius on a 53.5 in wheelbase, 41.5 in wide, 116.9 in long with forks, 48V / 202Ah lithium battery with a 48V / 100A charger, 4.75 kW drive and 10 kW lift motors, 20 percent laden gradeability, solid pneumatic tires, side shift, InMotion controller, 3-year limited warranty.
Question 2: What does the heaviest load weigh, and how high does it go?
Capacity is where the 3-wheel line ends. The 3-wheel EKKO trucks on Warehouse Gear Hub run from the 3,500 lb EK16A, sold with 138, 177, 189 and 216 in masts, up to the 4,000 lb EK18AT-185Li, and that is the top of the range. The 4-wheel GT-Li line starts at 4,000 lb with the EK20GT-Li, steps to 5,000 lb with the EK25GT-Li, and continues to 6,000 and 7,000 lb; our electric vs propane forklift guide prices the whole 4-wheel line against its propane twins. So if the heaviest pallet on the dock weighs 4,200 lb, the aisle question never comes up. You are buying a 4-wheel truck.
Read the rating the way the nameplate states it. Every capacity in this guide is at a 24 in load center, meaning the load's center of gravity sits 24 in forward of the fork face. A longer or forward-loaded pallet moves that center out and the truck lifts less than the plate says. Side shift is factory-fitted on all four trucks here, so it is already in the rating; anything added later is covered by 29 CFR 1910.178(a)(4): "Modifications and additions which affect capacity and safe operation shall not be performed by the customer or user without manufacturers prior written approval." Paragraph (a)(6) adds that "the user shall see that all nameplates and markings are in place and are maintained in a legible condition."
On height, the matched pair is a wash: both the EK18AT-185Li and the EK20GT-Li lift to 185 in with 43.7 in of free lift, per EKKO. The 3,500 lb EK16A reaches higher on paper, to 216 in on the EK16A-216Li, with 29.5 in of free lift on the 177 in model per our product page. Free lift is the height the forks rise before the mast extends, and it is the number to check against a trailer roof or a low door before the top beam height.
5,000 lb at a 24 in load center, 88.9 in turning radius, 45.2 in wide, 141 in long with forks, 8,734 lb service weight, 80V / 205Ah lithium battery, InMotion AC drive, Cascade side shift and Shimadzu 4-way valve pre-plumbed, solid pneumatic tires, 3-year limited warranty.
Question 3: Does the truck ever leave smooth, level concrete?
Three numbers decide this one: the tire, the grade the truck climbs with a load on the forks, and the clearance under it. Start with the tire. The EK16A rides on cushion tires, and its product page says so plainly: "Recommended for Indoor use on flat surfaces." Cushion tires are solid rubber pressed onto a steel band, low to the ground and built for finished floors. The EK18AT-185Li and both GT-Li trucks ride on solid pneumatic tires, a solid tire with a pneumatic profile that takes packed gravel, dock ramps and yard asphalt without the puncture risk of an air-filled tire.
Then the grade. EKKO rates the EK16A at 6 percent laden and 10 percent unladen, which is enough for a level dock and a mild dock plate and not much more. EKKO rates the EK18AT-185Li at 20 percent with a load, more than three times the EK16A figure, and lists its travel speed at 10 mph laden or unladen. The GT-Li pages list 9.3 mph travel and do not publish a gradeability figure, so get it in writing from EKKO before you plan a ramp around a 4-wheel truck. EKKO lists 4.3 in of ground clearance at the mast for the EK20GT-Li; the EK18AT page does not publish clearance.
The real limit of a 3-wheel truck outdoors is the single steer wheel. On a 4-wheel truck, a pothole under one rear tire is shared with the other. On a 3-wheel truck, the rear of the machine is riding on that one contact patch, so the surface it works has to be predictable. A solid pneumatic 3-wheel truck like the EK18AT handles a paved yard and a dock ramp. Broken pavement, gravel with ruts, or a lot that floods in the rain is 4-wheel territory. Neither EKKO page publishes a weather or water-ingress rating for either truck, so a truck parked outside in all conditions is a question to put to EKKO in writing.
58.9 in turning radius on a 49.2 in wheelbase, 42.1 in wide, 107.1 in long with forks, 5,200 lb service weight, 24V / 320Ah lead-acid battery and 24V / 50A charger included, 2.2 kW AC drive and 3.3 kW lift motors, 6 percent laden gradeability, cushion tires, side shift, Zapi controller. Also sold as the 138 in EK16A-138 ($22,799.05) and the lithium 189 and 216 in models.
Question 4: Is a 3-wheel electric forklift less stable than a 4-wheel?
Less than most buyers assume, and OSHA's own text explains why. Appendix A to 29 CFR 1910.178, Stability of Powered Industrial Trucks, describes a counterbalanced forklift this way: "the vehicle is supported at three points. The truck's steer axle is attached to the truck by a pivot pin in the axle's center." That sentence is about a 4-wheel truck. Its two rear wheels sit on an axle that pivots at its center, so for stability purposes the rear of the truck is one point, and the base the truck balances on is a triangle drawn between the two front wheels and that pivot. A 3-wheel truck draws the same triangle; its rear point is the steer wheel itself.
The appendix then gives the rule both trucks live by: "When the vehicle's line of action, or load center, falls within the stability triangle, the vehicle is stable and will not tip over. However, when the vehicle's line of action or the vehicle/load combination falls outside the stability triangle, the vehicle is unstable and may tip over." What separates the two trucks is the size of that triangle, and the spec sheet puts numbers on it. The EK18AT-185Li has a 53.5 in wheelbase and is 41.5 in wide. The EK20GT-Li has a 63.7 in wheelbase and is 45.2 in wide. A longer wheelbase and a wider stance make a bigger triangle, and the 4-wheel truck has both, by 10.2 in and 3.7 in. The 3-wheel truck's smaller triangle and its smaller turning circle are the same geometry seen from two sides; you do not get one without the other.
Paragraph A-7 is the part that applies on the floor: "The dynamic forces that result when the vehicle and load are put into motion must also be considered," and at capacity "the load should be carried at the lowest practical height, the truck should be accelerated slowly and evenly, and forks should be tilted forward cautiously." A tight turn taken fast with a raised load moves the combined center of gravity toward the edge of the triangle on any counterbalanced truck, and on the 3-wheel truck the edge is closer. Train to that. 1910.178(l)(1)(i) requires the employer to "ensure that each powered industrial truck operator is competent to operate a powered industrial truck safely, as demonstrated by the successful completion of the training and evaluation specified," and (l)(4)(ii) lists the events that require refresher training, one of which is that "the operator is assigned to drive a different type of truck." Moving an operator from a 4-wheel truck to a 3-wheel one, or back, is that event.
4,000 lb at a 24 in load center, 86.2 in turning radius on a 63.7 in wheelbase, 45.2 in wide, 138.9 in long with forks, 7,594 lb service weight, 80V / 205Ah lithium battery, 9.3 mph travel, 4.3 in ground clearance at the mast, Cascade side shift and Shimadzu 4-way valve pre-plumbed, solid pneumatic tires, 3-year limited warranty.
Which electric forklift should you buy?
Match the building to the line that describes it.
- Aisles a 4-wheel truck cannot turn in, loads to 3,500 lb, finished indoor floor, one shift: EKKO EK16A-177 ($24,224.05). 58.9 in turning radius, cushion tires, 24V lead-acid battery and charger included. Pick the 138 in EK16A-138 ($22,799.05) for low racking, or the lithium EK16A-189Li ($25,649.05) and EK16A-216Li ($27,074.05) for taller beams and opportunity charging.
- Same tight aisles, 4,000 lb, dock plates or a paved yard in the route: EKKO EK18AT-185Li ($34,579.05). 61 in turning radius, 20 percent laden gradeability, solid pneumatic tires, 48V lithium. It costs $2,660.00 more than the 4-wheel at the same rating; the aisle is what you are buying.
- 4,000 lb, aisles already 12 ft or wider, lowest price at that rating: EKKO EK20GT-Li ($31,919.05). 86.2 in turning radius, 80V lithium, 3-year limited warranty.
- 5,000 lb: EKKO EK25GT-Li ($34,579.05), the same price as the 4,000 lb 3-wheel truck with 1,000 lb more rating and a turning radius 27.9 in larger. 6,000 and 7,000 lb move to the EK30GT-LI and EK35GT-LI in the electric forklifts collection.
- Loads under 4,400 lb in aisles where even a 3-wheel truck will not fit: price a walkie straddle stacker before a forklift. Our straddle vs counterbalanced stacker guide covers that class, with lift heights to 216 in and prices.
- Pallets that never leave the floor: a counterbalanced forklift is more truck than the job needs. Start with the electric vs manual pallet jack guide.
Every truck above is in the electric forklifts collection, and we are an authorized EKKO dealer, so the warranty is the factory's. If the building lands between two lines, call 1-800-794-1049, 8 AM to 4 PM Central, with your narrowest aisle in inches, your heaviest pallet, and whether the truck crosses a dock plate. We will confirm the model, match a written price from another authorized EKKO dealer, and send a quote for approval, with volume pricing on multi-truck orders.
Frequently Asked Questions
What is the difference between a 3-wheel and a 4-wheel forklift?
The steering. A 3-wheel counterbalanced forklift steers with a single rear wheel or a close pair on the truck's centerline, so it turns in a smaller circle; a 4-wheel forklift steers with a full rear axle. On EKKO's spec pages that is 58.9 to 61 in of turning radius for the 3-wheel EK16A and EK18AT against 86.2 to 88.9 in for the 4-wheel EK20GT-Li and EK25GT-Li. The 4-wheel line carries more: the 3-wheel EKKO trucks we stock top out at 4,000 lb, and the GT-Li 4-wheel line runs 4,000 to 7,000 lb.
Are 3-wheel forklifts less stable than 4-wheel forklifts?
Both balance on a stability triangle. OSHA's Appendix A to 1910.178 states that a counterbalanced truck "is supported at three points" because "the truck's steer axle is attached to the truck by a pivot pin in the axle's center," so a 4-wheel truck's rear is one point too. The 4-wheel truck's triangle is bigger: the EK20GT-Li has a 63.7 in wheelbase and 45.2 in width against 53.5 in and 41.5 in on the 3-wheel EK18AT-185Li. Both trucks tip when the combined center of gravity leaves the triangle, and the 3-wheel truck reaches that edge sooner in a fast turn with a raised load, which is why A-7's rule to carry the load low and accelerate evenly matters more on it.
What aisle width does a 3-wheel electric forklift need?
Using Toyota's formula of right-angle stacking width plus load length plus 12 in, and EKKO's turning radius as the stacking figure, the floor is 118.9 in for the EK16A (58.9 + 48 + 12) and 121 in for the EK18AT-185Li (61 + 48 + 12), then add the distance from the front axle to the fork face, which EKKO does not publish and you measure on the truck. The 4-wheel EK20GT-Li starts at 146.2 in by the same math. Confirm the finished number with a tape and a pallet before you set rack spacing.
Can a 3-wheel forklift be used outside?
On paved, predictable surfaces, yes, if it has the tires and the grade rating for it. The EKKO EK18AT-185Li rides on solid pneumatic tires and is rated at 20 percent gradeability with a load, per EKKO. The cushion-tire EK16A is listed for indoor use on flat surfaces with a 6 percent laden grade. A 3-wheel truck's rear rides on one steer wheel, so gravel with ruts, broken pavement, or standing water is 4-wheel work. EKKO does not publish a weather rating for either truck.
How much weight can a 3-wheel forklift lift?
The 3-wheel EKKO trucks on Warehouse Gear Hub are rated 3,500 lb (EK16A, masts from 138 to 216 in) and 4,000 lb (EK18AT-185Li), each at a 24 in load center. Loads above 4,000 lb move to the 4-wheel GT-Li line, stocked at 4,000, 5,000, 6,000 and 7,000 lb. Any attachment that changes the rating needs the manufacturer's prior written approval under 29 CFR 1910.178(a)(4).
How much does a 3-wheel electric forklift cost?
On Warehouse Gear Hub as of this writing, the EKKO EK16A-138 is $22,799.05, the EK16A-177 is $24,224.05, the lithium EK16A-189Li is $25,649.05, the EK16A-216Li is $27,074.05, and the 4,000 lb lithium EK18AT-185Li is $34,579.05. For comparison, the 4-wheel EK20GT-Li (4,000 lb) is $31,919.05 and the EK25GT-Li (5,000 lb) is $34,579.05. The EK16A and EK18AT prices include the battery and charger; on the GT-Li trucks the pack is built in and the charger voltage (480V 3-phase standard, 220V or 110V optional) is confirmed on the quote.
Answer the four questions, then buy once
EKKO 3-wheel and 4-wheel electric forklifts from 3,500 to 7,000 lb, with turning radius, wheelbase and battery on every product page.
Shop electric forklifts →Authorized EKKO and UltraTech dealer. Questions on aisle fit, capacity, or a multi-truck quote: call 1-800-794-1049 (8 AM to 4 PM Central) or email info@warehousegearhub.com.