Dear Cool Guys,
Yeah, it's the same with wheels. Until you get up to 16+" wheels, there's little weight savings between aluminum and steel. However, an aluminum chassis doesn't rust and need paint. That's cool. And it sounds like your aluminum-weight, steel teardrop chassis aren't made of thick wall, steel square tube. My ex-teardrop had a 4" channel steel chassis and a steel plate floor all the way back...and a 7,000 pound axle with seven leaf springs, brake drums and jumbo shocks. (I kid you not.) It weighed 1,800 pounds empty...12 feet long.
After I quit drinking Pepsi and lost all that weight, I didn't need it any more.
Prem