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NIU KQi Air and Air X: parts and specs

Replacement parts and specs for the NIU KQi Air and KQi Air X: 9.5-inch tubeless tires, front disc with regenerative braking, the KQi Air Series Super Charger at 54.6 V 2.0 A, and battery specs.

Last edited Nov 9, 2026 by Pedalwise team Edit History Add a subpage

The Pedalwise team started this page from official manuals, support pages and repair videos. Fixed this yourself, or spotted something wrong? Help improve it.

This page lists the common replacement parts for the NIU KQi Air and KQi Air X. Specs are for the stock scooters as sold; check your own scooter before you buy. NIU sells its tire and charger for the whole KQi Air series, so they are listed here for both.

Photo needed: A NIU KQi Air X front wheel, showing the tubeless tire and front disc brake.. Add one

Chargers and batteries on this list must match this exact model, and they are fitted at the external charge plug or by a pro. Never open the battery, controller, motor or display. For charging trouble, start with battery won't charge and e-bike battery care.

Parts list

  • Tire: KQi Air X: 9.5-inch tubeless. NIU's tires for the KQi Air series are 9.5 x 2.3, not self-healing, $24.99, sold out, read Nov 9, 2026. Seat a new tire at about 90 psi on first fill, then let it down slowly to about 45 psi.
  • Disc brake pads: KQi Air X: front disc brake plus regenerative braking. NIU's US store had no pads listed on Nov 9, 2026.
  • E-bike charger: NIU's KQi Air Series Super Charger is 54.6 V, 2.0 A, $89.99, in stock, read Nov 9, 2026. It does not fit the KQi Youth, Youth+, KQi1 series, KQi1 Pro, KQi2 Pro or KQi3 series, so don't swap chargers between NIU models.
  • E-bike battery: KQi Air X: 48 V, 451.2 Wh, about 5 hours to charge. Battery replacement is a pro or warranty job.

Tools for common jobs

  • Floor pump with gauge: to top up the tubeless tires to the pressure in your manual.
  • Hex keys: to adjust or center the front disc brake caliper. Check the size on your scooter.
  • Multimeter: a shop or careful owner can confirm the charger puts out close to its 54.6 V rating. See check your charger.

Where to buy

Common repairs

Sources

Stuck after these checks? Find a shop near you.

Need a pro?

If these steps didn't fix it, find a shop near you in our partner network. For battery or wiring trouble, look for shops marked Battery and electrical.

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