Hi everybody.Just like to intoduce myself.Not a total landy virgin,but new to this!(owned Series 1 v8 conversion many moons ago).Like to ask a question from you all.I own a series 3 petrol with 7.50x16,s on,and as i am a bit of a poser would like to fit 31.10.50x15,s on 8 spokes.Anybody forsee any problems?Great site by the way!

Hi and welcome!!
Take a look at this and see if it helps at all. Its a tyre size conversion site.
http://www.1010tires.com/TireSizeCalculator.asp?action=submit