NIU KQi 300X Electric Scooter

NIU rates the hub motor at 500 W with a 1000 W peak and 37 N·m of torque, driven by a sine-wave (FOC) controller, and claims 0 to 15 mph in 3.9 seconds with a 165 lb (75 kg) rider on flat ground. Its 25% climb rating sits between the Segway Max G2 (22%) and Max G3 (30%). The modes are E-Save, Sport, Custom and Pedestrian, and the NIU app adds cruise control.

Its 20 mph US top speed sits at the ceiling of New York's e-scooter definition (VTL §114-e), which also requires a weight under 100 lb (the KQi 300X is 48.7 lb), and above California's 15 mph limit for motorized scooters (Vehicle Code §22411), so California riders must hold it to 15 mph. At 20 mph and 1,000 W peak it is also outside New Jersey's legal e-scooter definition (under 19 mph and 750 W or less). Scooters are not e-bikes, so the US e-bike classes do not apply. NIU says riders should be 14 or older, yet California requires a driver's license or instruction permit (§21235), and Pennsylvania does not allow e-scooters on public roads.

The battery is 48 V and 13 Ah, which NIU gives as 608.4 Wh: more than the Segway Max G2 (551 Wh) or Max G3 (597 Wh). NIU claims 37.3 miles (60 km on its global site). Its US page gives no test conditions, but the KQi 300 series manual measures it with a 165 lb rider at a constant 9.3 mph on flat ground at 77°F, a slow-speed figure; NIU gives none at full speed.

We estimate about 23 to 28 miles at full speed for a 175 to 180 lb rider. That is 608.4 Wh divided by 22 to 27 Wh per mile, the middle half of 32 published full-speed range tests of commuter scooters. In those tests, scooters covered a median 59% of their advertised range. Makers that publish their conditions, NIU included, test with 150 to 165 lb riders at about 9 to 10 mph on flat ground at 77°F, so slower riding gets you closer to NIU's number. NIU quotes 6 hours for a full charge, and its global page lists an app setting that stops charging at 80%.

Brakes are the strongest part of the spec sheet: disc brakes front and rear plus regenerative braking, where the Segway Max G2 pairs a front drum with a rear electronic brake. The KQi 300X rides on 10.5 x 2.5 in self-healing tubeless tires with a dual-tube hydraulic front fork (45 mm of travel); there is no rear suspension. It is rated IP55 for dust and water, and the lights include a halo headlight, a brake light, side reflectors and turn signals.

At 48.7 lb with the battery, it is heavy to carry up stairs. NIU's global site gives the folded size as 1174.5 x 542 x 544 mm, about 46.2 x 21.3 x 21.4 in. The rider limit is 265 lb. NIU's US warranty covers the main body, including battery, motor, frame and controller, for 2 years; brake discs, levers, cables and the throttle get 6 months, and lights, fenders and the kickstand 3 months.

NIU's US store shows a UL 2272 certification tile for the KQi 300X, and the Amazon listing says all NIU scooters hold UL certification without naming a standard or a lab. NIU states UL 2272; we could not verify it in the certifier's directory. UL 2272 covers a scooter's electrical system and fire safety; it does not test folding stems, brakes or welds. New York City has required UL 2272 for e-scooters sold there since September 16, 2023 (Local Law 39), and in June 2026 the CPSC proposed a rule that would adopt it nationwide (Federal Register). That rule is not final.

No CPSC recall found for the NIU KQi 300X as of October 2026 (CPSC recalls), and NIU's US store carries no recall notice. Our electric scooter safety guide explains how to check a listing's claim.

• NIU KQi 300P ($749 as of Oct 22, 11:10 AM EDT, subject to change): the same frame, fork, tubeless tires, disc brakes and IP55 with a smaller 486.7 Wh battery (about 18 to 22 miles by our estimate), a 450 W rated motor and a 20% climb, 2.7 lb lighter. The better buy for short, flat commutes; see KQi 300P vs 300X.
• Segway Ninebot Max G2: rear suspension the KQi 300X lacks and published range tests (25 miles at 22 mph), against a smaller 551 Wh battery, a front drum and rear electronic brake, and 4.8 lb more weight (53.5 lb). At our last check it cost $699.99 (as of Oct 22, 11:10 AM EDT, subject to change). Our Max G2 vs KQi 300X comparison goes through the differences.
• Segway Ninebot Max G3: a stronger 850 W rated, 2000 W peak motor, hydraulic suspension at both ends, IPX6 and a 286 lb rider limit, for 5.5 lb more weight (54.2 lb). It ships at 20 mph and unlocks 28 mph in Segway's app. Its 597 Wh battery is slightly smaller, and Segway's US store marks the G3 end of life.

Buy the KQi 300X if you ride far or ride hills and value stopping power: it pairs a 608.4 Wh battery with two disc brakes and a 25% climb rating. At our estimated 23 to 28 miles, a 10-mile each-way commute fits on one charge with a small margin. It also suits riders up to 265 lb.

Skip it if you must carry it up stairs often (48.7 lb), if you want rear suspension (both Segway Max models have it), or if you want a full-speed range figure, which NIU does not give (its 37.3 miles is measured at a constant 9.3 mph). If price comes first, our best electric scooters for adults guide covers cheaper picks.