Originally Posted by HABBERDABBER
For me, it looks like too big is better than too small. My cover even extends below my tires.
I have the same style cover as you from my old trailer. One thing to keep in mind with the cover that far down is it makes it easy for mice to climb up the cover. We found mice nests on our roof under the cover on our old trailer. So, I'm not sure bigger is actually better.
The old cover was getting worn so I'm using it for material. My wife is very good at sewing and is using fabric from the sides of the old cover to make a cover for the storage box. We are also planning on using material from the roof of the old cover to add custom fit boxes over the solar panel and AC. That will allow a little more material for the sides. Both places where we park our trailer when not travelling don't have a lot of sun exposure on the tires anyway.