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Rear Single Speed (Max45)

Our Single Speed Max45 kits bring the high-power 45 mm All-Axle motor to regular 135 mm frames, not just fatbikes, by running a single-speed freewheel instead of a derailleur cassette. It is the simplest way to get serious Max45 power onto a standard bike. Read the full story on our blog.

Not sure where to start? Build a complete kit for your bike step by step in the kit builder, or check the compatibility guide to see which motors fit your frame. You can also compare performance in the motor simulator, browse real conversions in the project gallery, or if you're new to ebikes, start with our Start Here guide.

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  1. Max45 Single Speed CA3 Kit

    From USD$1,415.75

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  2. Max45 Single Speed Main9 Kit

    From USD$1,382.40

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Kit Type
  1. CA3 1
  2. UART 1
Motor Position
  1. Rear 2
Motor MFG
  1. Grin Tech 2
Motor Power Range (Watts)
  1. 1000-2000 2