Had a discussion about wheel sizes for the Bushman at Stafford. My D10 has at present some tin worm 19" rims. I'm replacing these with alloys and wondering what the size should be.. Some say 18" rear and 19" front. Can't find anything official to give me the correct size . Yes going down the alloy track as the bike is going to be used off road on gentle green lanes. Oh yes tyre sizes , possibly 300 front and 325 rear or would 350 be a tad on the large size... Thanks