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NIU KQi 300P and 300X: parts and specs

Replacement parts and specs for the NIU KQi 300P and KQi 300X: 10.5 x 2.5 tubeless tires, dual disc brakes, the KQi 300 Series Super Charger and battery specs, from NIU's own store.

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

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This page lists the common replacement parts for the NIU KQi 300P and KQi 300X. Specs are for the stock scooters as sold; check your own scooter before you buy. Both use 10.5 x 2.5 tires and dual disc brakes, but NIU sells a separate tire for each.

Photo needed: A NIU KQi 300X front wheel, showing the wide tubeless tire and 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: 10.5 x 2.5 tubeless on both, self-healing on the 300X. NIU's tires for KQi 300P, $37.99, sold out, and tires for KQi 300X, $34.99, 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: dual disc brakes front and rear plus regenerative braking on both. NIU's US store had no pads listed on Nov 9, 2026.
  • E-bike charger: NIU's KQi 300 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, KQi2 Pro or KQi3 series. Charge times: 300P about 5 h, 300X 6 h.
  • E-bike battery: 300P: 48 V, 486.7 Wh (10.4 Ah). 300X: 48 V, 608.4 Wh, 13 Ah. Battery replacement is a pro or warranty job.

Tools for common jobs

  • Floor pump with gauge: to seat a new tubeless tire and then hold the riding pressure for your scooter.
  • Hex keys: to adjust or center the disc brake calipers. Check the size on your scooter.

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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