Yep, 30A is the softest compound, therefore making it the most “squishy.” 60A is a lot firmer, and therefore it has less compression.
Versahubs are the most convenient way to mount the 3” and 4” flex wheels.
Versahex adapters are the most convenient way to mount the 1.625” and 2” flex wheels.
Side note: I would highly recommend the 1/4 length versahex adapters to mount these flex wheels. The 1/8 adapters tend to fall out easily.
Check out this thread to learn more about mounting flex wheels.
Check out these YouTube videos comparing flex wheel compression levels with/without versahubs, as well as hardness levels.
