We have recently traded up in 5'ers from 30ft to 35ft. This one came with 3" blocks on the axles and 16" and tires (finally)! The mix of tires and the date codes concerned me as we are planning a 5-8k trip this winter starting around new years. It had 2 BCT LT's, a Heritage, and Firestone LT. Talked to my local tire guy, he looked at the dates and said "Let me show you a low mileage BCT". Went out back, and showed me a BCT LT with a thread cap de-laminating. Started looking at the usual alternatives and found some larger (taller and wider) Firestone LT's made right here in NC. Tey have a decent road tread, rated better than the previous. So they are mounted and balanced and ready for the road. For the first time in a long time I have no concerns of looking in my mirror and see black shreds flying out from under the trailer! I'll update comments regarding wear etc. as the trip unfolds.