I've read on here that the tongue weight rating is somewhere in the 400 lbs. range, but I've found that my Tone hitch will start leaning at around 200-250 lbs. jmayer40 you are correct in how the hitch mounts, as well as in your observation as to why it leans. If the hitch were mounted to the frame rails as in the Curt/Dylan style, the whole truck would sit low in the back but the hitch wouldn't lean. The downside to the frame-rail approach is that force exerted on the hitch can cause the frame to twist, whereas the Tone-style only impacts the cross member.

Wiser folks please correct me if I'm wrong on any of that.