I finally removed the speaker wheels from my 2 15" subs as I don't need the wheels anymore. These speakers are dedicated to my Mazda 6 wagon now!
2 JL 15W0v2 15” Subwoofers 4 ohms rated @ 500 watts each. They weigh 36 lbs each, not too bad to remove. They fit better now with speaker wheels removed.
Also put the original floor back in. Before had an aluminum floor behind the rear seats with rubber on top which was actually lower than original floor.
Was able to rotate speakers as well to shorter height, which also allows me to close the lid with original floor. Flipped over the back portion on top at back of lid to allow bass to go more places.

The 15W0v2-4 15" sub features a tough polypropylene cone that resists flexing, and a durable foam surround that'll stand up to hard use. The cone's extra-long excursion (12.7mm) capability lets it hit truly deep notes without distorting, while the hefty 2.5” inch voice coil drives the woofer accurately for top-notch performance under extreme conditions. The patented elevated frame design delivers air flow directly to the voice coil, which cools it down and enhances power handling. JL Audio designed this sub to work in compact sealed or medium-sized ported enclosures. Each driver weighs 16 pounds + 20 pounds for the 3/4" plywood box.

First pic is before shot with wheels.