Segway Navimow X4 Review: Is the $2,499 Upgrade Worth It? (vs. X3 & i-Series)

On February 13, 2026, Segway is launching its most powerful robot mower lineup yet: the Navimow X4 Series.

Segway’s journey has been impressive. They started with the pioneering H-Series (the original wire-free pros), then disrupted the market with the consumer-favorite i-Series (smart & affordable). Now, the family is complete with the arrival of the X-Series.

While the i-Series captured the hearts of suburban homeowners, the new X4 Series is designed for a completely different user: those with large estates, steep hills, and a demand for ultimate performance.

Today, we are analyzing the new flagship Navimow X430 and comparing it against its mid-range sibling (X315) and the entry-level favorite (i110N) to see if the $2,499 price tag is justified.

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The New Hierarchy (i vs. X3 vs. X4)

Before you pre-order, it is crucial to understand where each model fits. Segway now offers three distinct tiers:

1. The Entry Class (i-Series): Perfect for standard flat lawns under 0.25 acres. It uses the same core vision technology but in a lighter, plastic chassis.
2. The Pro Class (X3 Series): The spiritual successor to the original H-Series. These are built tougher, heavier, and designed for medium-sized yards (up to 1 acre) with moderate slopes.
3. The Flagship Class (X4 Series): NEW for Feb 2026. This is the “Ultra” model. Designed for complex terrain, huge batteries, and extreme slopes (84%). It is a direct competitor to the AWD mowers from Mammotion.

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The Specs Showdown (Flagship vs. Entry)

Is the X430 really worth double the price of an i110N? We analyzed the technical datasheet to show you exactly what that extra money buys you.

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Why the X4 Series is a “Big Deal”

Looking at the official spec sheet, the X4 Series isn’t just an upgrade; it is a completely different class of machine. Here are the four “game-changing” stats that justify the premium price tag.

1. The 84% Slope King (4WD Beast) This is the most shocking stat on the sheet.

• The i110N handles 30% slopes (Front-Wheel Drive).
• The X3 Series handles 50% slopes (Rear-Wheel Drive).
• The X4 Series handles 84% (40°) slopes. This is made possible by its 4WD system with dual independent steering motors. This allows it to climb hills that are nearly impossible to walk up. If you have extreme terrain that previously required a string trimmer, the X4 is the only robot that can handle it.

2. Massive Efficiency: 17-inch “Dual Disc” Cut The cutting width difference is astronomical.

• i110N: 7.1 inches.
• X4 Series: 17 inches. The X4 uses a 2 Disc, 12 Blade system. In a single pass, it cuts 2.4 times more grass than the i110N. Combined with the 12.8Ah battery (which is nearly triple the capacity of the i110N), the X4 is designed to mow massive estates in a fraction of the time.

3. “All-Seeing” Navigation (360° Vision + NRTK) The navigation system has evolved significantly.

• The i110N uses a forward-facing 140° camera.
• The X4 Series uses a 360° Vision system + ToF (Time of Flight) sensors. This means zero blind spots. Combined with NRTK (Network RTK), this machine offers the highest level of positioning accuracy and obstacle avoidance Segway has ever produced, ensuring it won’t get stuck under trees or crash into unexpected objects from the side.

4. Professional Cutting Range (0.75 – 4 inch) Finally, look at the cutting height. The X4 can cut as low as 0.75 inches (golf course fairway style) and as high as 4 inches. Whether you want a manicured look or need to tackle tall, rough grass, the X4 is the most versatile tool in the lineup. track your mower anywhere in your garden, even if your Wi-Fi doesn’t reach the back fence.

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Which One Should You Buy?

As we approach the February 13th launch, here is our verdict:

Stick with the i-Series (i110N) IF:

• You have a standard suburban yard: Ideally under 0.25 acres.
• Your lawn is relatively flat: It handles gentle slopes (up to 30%), but nothing extreme.
• Value is your priority: At ~$1,299, the i110N remains the undisputed “bang for your buck” champion for simple lawns.

Pre-order the X4 Series IF:

• You have Extreme Hills: The 84% (40°) slope rating is the killer feature here. Thanks to the 4WD system, it can climb steep banks that would flip other robots.
• You have a Big Estate: Forget “mowing time”; look at “cutting width.” With a 17-inch dual-disc deck, it cuts 2.4x more grass per pass than the i-series. It is built to dominate 1-acre properties.
• You want the Ultimate Tech: You get 360° Vision (no blind spots), NRTK precision, and a robust 63 lb tank-like build quality that puts plastic toys to shame.

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🛍️ Where to Buy