Also guys once you’ve finished spit roasting me lol... will 255/35 R20 fit?
Biggest overall wheel tyre combination you can fit is ~29" diameter, common off road tyre sizes in this range are 205/80/16, 235/70/16 & 225/75/16. For reference, standard wheels / tyres are about 26" overall diameter. You asked about 255/35/20 and those are 27" diameter, so you could go up to 255/35/22 if you want the full bling. But they would stick out quite a bit more.
That would look sweet - if you do put 20'2 or 22's on a freelander - I want to see pictures.
Have a play with:
https://tiresize.com/tyre-size-calculator/ and use the comparison tab and 225/75/16 as your reference size, any tyre rim combination that's under the magic 29" diameter will fit. Fittment details for your wheels will be:
Pitch Circle Diameter (PCD / Bolt Pattern) of 5x114.3
Centre Bore of 64.1mm
Rim width will be determined by what tyres you go for.
Rim diameter will be determined by what tyres you go for.
Rim offset will be determined by what tyres you go for.
If you ping me in the thread when you work out the rims and tyres I'll calculate the offset for you. Or if you want to do it for yourself, you'll need to first work out your rim width, which can be taken as roughly treadwidth divided by 25 minus 1 roughly gives you the rim width you can normally go half an inch either way from the answer to that sum.
So on the 255/35/20 you'd "get away with" 8.5J or a 9.5J but would be best with a 9J. Once you've got your tyre size finalised, and thus calculated the rim width, you need to work out the required offset, to do this play with:
https://www.1010tires.com/Tools/Wheel-Offset-Calculator# and remember wheels sticking out past the arches are an mot fail and or endorsable, so think carefully.
I think with either the 255/35/20 or 255/35/22 sizes, with 9J rims with a 25ET offset would JUST be inside the arches and clear of the suspension gubbins, but I don't know how that would be for rubbing. the arch lip and or the outside of the arch liners?