26", 27.5", and 29" refer to the wheel (tyre) size, which you can find printed on the tyre itself. By default, the width is standard, except for the two 26×4" fat tyre options.
These replacement spokes are designed for the TDR Electric motor rim and are not compatible with standard push bike rims.
Please note that replacing the spokes and properly balancing the rim requires advanced skills. If you don’t have experience, we recommend purchasing a rim without the motor and motor cover instead.











