Replacement rear wheel for e-bike (hybrid)

redvision
redvision Posts: 2,958
edited June 2023 in MTB buying advice
After a bit of advice on replacing a rear wheel on an ebike. Might be a daft question but will any 29" mtb rear disc brake wheel be suitable as a replacement for one on an ebike?

Asking for a relative who has a hybrid ebike which has a crank powered motor, so not hub powered, but is struggling to figure out a suitable rear wheel to replace the stock wheel which is broken (sounds like beyond repair or at least not worth getting it repaired).

The bike is a cube hybrid Pro 625, so would welcome recommendations for a suitable replacement rear wheel. Type of riding is mixed but mainly off road but i don't think he rides tough mountain biking terrain.

Cheers

Comments

  • reaperactual
    reaperactual Posts: 1,185
    edited June 2023
    I've checked the spec here:

    https://www.paulscycles.co.uk/bikes/electric-bikes/cube-reaction-hybrid-pro-625-electric-mountain-bike-2023-flash-greygreen__11000

    Stock hub is a Boost 12mm thru axle with Centrelock rotor mounting.

    Replacement wise you'll want a 148x12 thru axle hub with the same Centrelock to use the original brake rotor.

    It is fitted with a Shimano Deore M5100 cassette so you'll require the hub to have a HG Shimano splined freehub.

    Ideally you'll want a similar internal rim width as is on there now.

    There's plenty to choose from that would be fine providing the fitments match up.

    This isn't the cheapest example but great quality and is designed specifically for e-bikes:-

    https://www.merlincycles.com/hope-fortus-30w-pro-5-e-bike-boost-rear-wheel-29-291834.html
  • steve_sordy
    steve_sordy Posts: 2,446
    ebikes need a magnet somewhere on the rear wheel so that a sensor on the frame can detect how many rpm the wheel is doing. From that it can work out how fast you are going and from that, and additional data from torque sensors and so forth, it can decide how much support the motor should give you. The magnet is an important component in how it all works. So, before you chuck the old wheel away, make certain that you locate the magnet! It may be fastened in some way to the brake disc (in which case no problem), but there are alternatives used.
  • redvision
    redvision Posts: 2,958
    Thanks both. Much appreciated.

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