A five-footer that I used to run on my B7800 would cut 14" steel rims
The noise from my six-footer on my NX5510 keeps me from pushing it too hard: read: "No way do I want to operate anything that is cutting up large material on a sustained basis!"
Hit a steel rim? Ouch, can’t imagine! I’ve hit my fair share of steel property markers hiding in the weeds. It’s definitely a sound I could go the rest of my life not hearing again