check your local bike shop(s) to see if they will order one for you. sometimes online deal savings are reversed by shipping to your address. as for the size, go by the manual concerning tire size. I should have run a 110 on my rear wheel, but a 120 looked so much cooler I just couldn't resist. the result, a fat tire that looks cool standing still but that wears more quickly and unevenly than the 110. 120's get a flat spot very quickly at the center, shortening the overall life of the tire. I should have listened to TT's answer when I posted this same question four years ago.
belated Thanks Lloyd,
Hym