As the title states I’m about to convert my 2017 WR450 into a Sumo. before I start ordering my wheel set could someone please give me some help in regards to rear wheel/tyre size. Im going with a 4.25”,I think a 5” with be to much. Also think that I won’t be able to run anything bigger than a 150 section tyre as the swing arm seems rather narrow compared to the KTM’s and Bergs’s Iv raced many years back,I was running a 5” wheel with 160 tyres on these. Anyone who has a WR which can comment on tire sizes and wheel sizes and chain clearance on the tires your comments will be appreciated.