I am wondering which size rim 15, 16 or 17" would be best for a dedicated set of drag wheels. I have 3.55 gears and thought I would go with a shorter tire so would 15" be best? What is the best width to go with, 6,7 or 8 "? Also are the MT ET streets tubeless? I still have my 16" waffles but I noticed that there are not that many sizes available for 16 wheels. THX