SR directly addresses only inertial frames. Can SR be applied to analyze accelerated frames? For example, consider a point on the rim of a rotating disc. I have see an analysis which makes claims by assigning an associated, instantaneous inertial frame comoving with the point at each position. My question is whether this can be used correctly since the frame of the point is always accelerating toward the center of the disc whereas any comoving inertial frame is not accelerating. Can you justify ignoring the acceleration in such an analysis?