108 pound cannon is the force of 108 cannons shooting a cannonball, Oda explained this in a SBS.
1080 pound cannon exists to show that zoro got stronger.
1080 pound cannon exists to show that zoro got stronger.
" 12 pounds might not sound like much, but the cannon needed to shoot them will need to weight over 1 ton. "
This is what Oda said.
And 12 x 9 = 108 ,
Nearly 10 ton Feat right there for Pre time skip zoro.
And In post time skip it got increased to 1080 pound ho.
Increasing it to further 100 Tons feat with Invisible Haki alone.