I just received the recently released Paragon 3 BLI UP B unit that I ordered to get more tractive force with my Paragon 2 ABB set, with one dummy B unit. BLI's information on this unit said it came with traction tires but mine didn't have them. After talking to a few customer support people one finally admitted that they don't have them and there was an error in the description. This doesn't really bother me because there is now plenty of power to pull my 14 car train up my 2.2 % grade but I thought some folks would like to know about this in case they were counting on having traction tires. By the way, both the Paragon 2 and 3 units have incredible sound and low speed operation in my opinion.