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The QiCycle Folding Electric Bike is Xiaomi’s first foray into the world of e-bikes. It has a 250W high-speed motor powered by Panasonic 18650 lithium batteries. The Shimano Nexus 3-speed gear hub in combination with the torque measurement sensor gives you up to 45km bike power on a single charge. It also has a trip computer can connect to your smartphones via their special app and is–of course–foldable.

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Replacing Gear from Shimano Nexus 3 to Nexus 7

Is their measurement compatible? Will it just only the matter of replacing the internal hub and shifter?

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The shifting mechanism is different between the 3-speed Nexus and hubs with more gears. So you might be able to swap them out, but you’ll have to check your bike frame to see how the gear-change mechanism mounts to the axle and rear frame chainstays. Shimano also makes a variety of different Nexus models with different widths, so you would have to make sure you get a Nexus 7 model with the same hub width as your Nexus 3. Depending on the age of your bike, the correct Nexus 7 hub might be hard to find. Newer “Alfine” models have a totally different shifting mechanism that might not be compatible with your bike - you’d have to check your rear frame to see.

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Adi Suryadi sarà eternamente grato.
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