Your maximum weight saving will be 10.8 pounds total on 14" Aluminum Trailer wheels.
It wouldn't be a fuel saver compare to cost. They look nice the same with white painted wheels and both require maintenance to keep them looking nice. I have chrome wheels and they need attention too.
2014 Ram 1500 CrewCab 4x4 5.7 Hemi 3.92 Rear and Air Lift 1000
2005 Jayco Jay Feather LGT - 29Y GVWR-6500 lbs.
Pro Series 1200 lbs. WDH with Double Sway Bar.
Champion 3100/2800 watt Inverter/Generator-Onboard Solar Power
ALJO 'Forever Young @ Heart' provide on their travels Music Entertainment to Senior Care Homes