In the UK NIU offers three different scooter platforms; the U, the M and the N series.
The NIU U series
models are very light, use a single Lithium-ion battery and are restricted to 28 mph (50cc equivalent).
The NIU M series
models were originally fitted with just one lithium-ion battery, however, in 2021 NIU launched two, slightly longer, M series models with twin-batteries. The new GT models are available as both a 50cc equivalent (28 mph) moped scooter and a 125cc equivalent capable of 43 mph. The twin battery GT models both offer improved acceleration and greater range.
The NIU N series
models are the flagships in the range and are equipped with two batteries for increased range, power and acceleration. In addition to the 28 mph Pro model, the two GTS variants are capable of 43 mph, which puts them in the 125cc class.