Originally Posted by
wphamilton
You didn't consider what I suggested
At the ground the tangential speed is zero. At the center of the hub it is the velocity of the bike. At the top, it is twice the bike's velocity. These numbers are the same regardless of the size of the wheel, therefore the spokes will have the
same linear speed.
The spokes do not extend the ground, nor to the center of the axle, and those are the only two points along the wheel assembly's radius at which the linear speed will be the same for the spokes of different size wheels. Everywhere else, which is the entire length of the spoke on actual wheels, the linear speeds are different.