Get the little aluminum "saucers" sold by most places like Audio Advisor.
Or if you know the thread size of the spikes, replace them with footers from Herbie's Audio Lab. That way, you won't have to be concerned about the spikes coming out of the saucers when the speakers are moved.
Or if you know the thread size of the spikes, replace them with footers from Herbie's Audio Lab. That way, you won't have to be concerned about the spikes coming out of the saucers when the speakers are moved.