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A 21"-front / 19"-rear off-road electric dirt bike on the generic Chinese "CS20/SS30" QS-hub platform, sold via AliExpress under the Eshiner storefront. This 72V 5000W configuration runs a genuine QS Motor rear hub motor with a Sabvoton/normal-wave controller, a 40.6Ah lithium battery, high-carbon-steel frame, telescopic front fork with airbag mono-shock rear, and front/rear hydraulic disc brakes. Advertised wattages are peak/nameplate figures; real continuous output is controller-gated.
Specs verified Jul 9, 2026
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