I'm not really too bothered by a few lbs here and there, between steel vs aluminum wheels, w/wo a bumper. What really bothers me is when one manufacturer jumps it's towing capacity by 30% from one model year to the next while keeping the same footprint and the similar curb weight. All this is done theoretically by remapping the HP and Torque, and making a few structural improvements. It's all about tow vehicle to trailer weight ratios. For example, one year they claim that their 8K pickup can tow 21.5K and the next year their 8K pickup can tow 30K. Seems like a quantum leap to me.