head in the rain just helmet ,in snow face mask that i can pull down below my chin if i get hot. torso rain, rain coat, in the snow wind proof shell fleece vest under if its real cold.legs rain some rain pants just cheap ones no biggie. snow i have full fenders thats most important,i wear shants with some sweat long underware with socker socks pulled up high. feet in both rain and snow i ride clipless i bought these sweet shoe covers at the lbs rain proof and warm as hell. hands full finger gloves till about 25 then i have some windstopper gloves that are warm. dont know much about tires i ride a ss mtb in the winter its got 2.5s on it hope this helps