14 Rancher wheel & tire suggestions

I’m new to the forum and I just purchased my first atv. A 2014 rancher dct. I want to upgrade wheels and tires but I’m not sure where to start. Would it be best to go with a 25 or 26" tire? I don’t want to loose any power or have any future gearing issues. I’m also unsure on what offset to get. I know the stock offset is 2/5 on the front and 5/2 rear but do I have to stick with that? I see a bunch of atvs that don’t match there factory offset. Any help would be great.

Thanks
Steven