30mm rims for 32mm 2 or 3 O ring wheels with D hub for N10 N20 N30 motor for 150g combat robot high traction wheels

I couldnt find any good wheels for my 150g combat robot that fit my chassis, had enough traction, and stayed on the hub well. So I made one. There are 2 models one for 2 O rings and 1 for 3, size 211 works best 212 can work (from harbor freight O ring assortment). I noticed a huge difference in traction and control compared to the single O ring models I tried before making this, and I haven't had a wheel or O ring fall off yet.