If you don't have a carpet anymore, there is no reason to have spikes since there is nothing for them to bite into and improve stability. Just use the brass discs alone or coins. Hockey pucks might be a better solution for a wood floor like someone else suggested.
How to stabilize speakers without spikes.
My wife won! In the interest of domestic tranquility I have relented. After living with carpet over wood floors and spikes on my speakers for many years, my wife wants to have a wood floor (maybe tile) installed in our house. I've always used spikes in my Vandersteens (2Ci) to stabilize them with a slight front tilt upward. What would you pros do now? As always, thanks for sharing your knowledge.
Tom
Tom