I have installed a slightly bigger hub motor on my slower bike today.
When tightening the M14 nuts, at about 30Nm of tightening torque, the axle begins to leave its position.
So when reaching about 50Nm of tightening torque, the axle will still be inside the dropout, but has already moved by a few millimeters downwards.
I will make torque arms for this bike later anyway, but I am just wondering why this is happening.
It‘s a 135mm dropout aluminium frame which I strech by a few millimeters to fit the motor. On each side is a washer inside the dropout.
When tightening the M14 nuts, at about 30Nm of tightening torque, the axle begins to leave its position.
So when reaching about 50Nm of tightening torque, the axle will still be inside the dropout, but has already moved by a few millimeters downwards.
I will make torque arms for this bike later anyway, but I am just wondering why this is happening.
It‘s a 135mm dropout aluminium frame which I strech by a few millimeters to fit the motor. On each side is a washer inside the dropout.