Best way to spike a large tower ( 100 lbs +)

Spike or not to spike. Seems like one of those issues for which the conventional wisdom will always be a moving target.

My speakers weigh 130 pounds each. I have them spiked on a carpeted suspended floor. I can't hear _any_ difference between spiked and not spiked.

But they are tall and seem more stable on spikes so I leave them in (as recommended by the manufacturer).

Mine came (used) without spikes. Spikes from Aerial Acoustics are silly overpriced in my tightwad opinion. So I made my own from grade 8 bolts.

To move the speakers I walk them spike to spike. No way that is going to stress my spikes. Its heck on the carpet though.

Hurt my back....bad....trying to lift these speakers while kneeling on the floor. It is less about the weight than weight+height. If I need to move them again will put the spikes on furniture sliders.

I have used the tape method but only put the tape (on the floor) around whatever feet I’m using to find the "exact" position I want them in. With spikes this works fine since you can position the spike into the center of the tape outline.

You've not revealed what speakers.  Instead of spikes I would look at the Isoacoustics Gaia II.  They greatly improve performance and you can GENTLY with help move them.  Once in place you might consider the carpet spikes for the Gaia footers as they greatly improve performance on carpet.
http://www.isoacoustics.com/products/gaia-series/gaia-ii/

 I really appreciate the input. I am hoping to give this a shot over the weekend. Markalarsen, I am on a suspended floor, could you elaborate as to why you feel spiking is not ideal? Speaks are Focal Electra 1038be. Thanks again everyone.

That speaker jack from Wilson is just an overpriced version of this:
https://www.calcarcover.com/product/low-profile-billet-aluminum-jack/705

Still better is to have another person hold the speaker while you insert and level the spike. As the old saying goes:
Many hands make light work.
B