Do I need to balance wheel?

[sil3nt]

Got new tyres fitted to a spare rim with no rotors attached. Hopefully picking up rotors tomorrow. Do I need to get the wheel balanced again?

Shop is obviously happy to do it, guy there said it probably isn't necessary given how close to the center they are (not an exact quote from him).

Plan is to take them in again unless some random on the internet convinces me otherwise

[schrodingers cat]

If something as symmetrical (and light) as a brake rotor causes your wheel to be out of balance something is wrong
Install the wheel and spin it to check for run-out both longitudinal - wobble for and aft if you will, and lateral - side to side. If the rotor is happily concentric then don't worry about re-balancing
If the new rotor wobbles be suspicious of the mounting face of the wheel.

[sil3nt]

If something as symmetrical (and light) as a brake rotor causes your wheel to be out of balance something is wrong
Install the wheel and spin it to check for run-out both longitudinal - wobble for and aft if you will, and lateral - side to side. If the rotor is happily concentric then don't worry about re-balancing
If the new rotor wobbles be suspicious of the mounting face of the wheel.

Two rotors so even less chance of putting it out of whack!