Speaker Spike Help

They measure 1.62 inches wide. My max is 1 inch.

Remember they don't have to go the same place. They can be used anywhere flat so long as they are far enough apart to maintain stability.

Also as far as height goes there are tables you can look up on-line for free to study the effect of port size/length/diameter. Basically what happens is raising the speaker higher reduces restriction of air through the port, which has the same effect as increasing the length or decreasing the diameter of the port. Play around with a calculator you will see real quick what this means. Sitting the speaker flat on the floor will effectively plug the port and make your speaker into a sealed design. The high mid-bass output and fast low bass roll off of the port will become the flat mid-bass output and more gradual low bass roll off of a sealed cab.

If you do this it will in no time be clear that unless you go way high or way low whatever difference you make will be at most about the same as what already changes anyway just with normal speaker placement moves, and probably a good deal less. 

BDR Cones are exact size you need and outstanding. They are flat on top and tapped for 1/4-20 threads commonly used on a lot of speakers. If the speaker is heavy enough then its weight alone will hold things in place and in that case you could use 3 per speaker. Although 4 threaded is better. Also they work great by themselves, but even better with BDR Round Things under them. On carpet or whatever, does not matter.