Not exactly sure but the spare is on a 16x6. Also 2024's come with G rated tires. ST235/80R16 should be same size as yours.
https://www.keystonerv.com/product/m...h-wheels/specs
We have the same size G rated tire (Sailun) on our 2021 3231CK with 16,500 GVWR. Some members mention upsizing to 235/85R16 since they're rated for 4400 lbs vs 4080 lbs. If you're looking to upsize the tire, here's a link that calculates tire size and has wheel sizes listed under alternates. The calculator shows the 85s are the same width but about 1 inch taller.
https://tiresize.com/calculator/
Just curious, since you want better wear, how many miles do you have on the tires?
Also depending on the width, a wider tire might experience more edge wear from scrubbing during tighter turns.