Chief Delphi - Looking for info on expandable shooter wheel

We were getting more wear on the wheels than the other teams, especially on our back wheel. We replaced the back wheel at Lenape, and then the front wheel at MAR champs. At St. Louis, we were planning to replace the back wheel again as it was starting to show wear, but we had more important issues to attend to, and we left it running as is. The wheels has some small abrasions in it, which did not affect our shooting.
We ran these wheels for our second district event (Lenape) after talking to a few mentors on 2590 during Hatboro-Horsham. We were originally running two AndyMark pneumatic wheels, and they were OK, but our bucket jamming problems during Hatboro-Horsham made us very unreliable and left us in many matches where we couldn't even shoot.

After Hatboro-Horsham, we completely redesigned our shooter and ran the new expandable wheels. One difference we ran them with was we had much more compression (it seemed) than other teams. We had over 1" of compression when the wheel was fully expanded. We ran the 2" width wheels with the 3/4" bore. To interface them, we simply bought a 3/4" to 11/16" bushing, and then another 11/16" to 5/16" bushing, and press-fit the bushings into the bore of the wheel, and pressfit the wheel onto our mini-cims we were using to power it.

EDIT: We ran the nitrile ones, but they also come in neoprene and urethane.