hello folks. i have lots of confusion with wheels, tires. are 650b tires the same size as 26 inch. i see lots of folks on here that have converted 700 wheel sets on their bikes to 650 b and wondered what would be involved in doing this. i have both 26 inch rims laying about and some new 650 b tires i ordered by mistake and never got around to sending back. thanks for any help.