Hi sir rastafoo! I was quickly informed by the LMB folks when I bought Betty to change my tires. The ones that came with Betty were new, clean and had lots of rubber left. But they were too weak for the bus. I think it was DJ that called them death balloons or something like that

.
I had to make myself spend the money and bought the Hankook RA08's as recommended by the LMB folks. I've only put about 2000 miles on them, but the sure footed feeling was quite apparent as soon as I put 'em on.
Side note: It was interesting that my spare was original. It was a 38 YEAR OLD TIRE

. I think the tire guy said something like "god help you if you ever drove on it". So I bought 5 RA08's.
Here is the review from Bus Depot's website:
"The Hankook RA08 185R14 All Season Radial handles well and has excellent wear characteristics. This tire has a ten year track record, and is the only all-season tire in its price range to be made by an O.E.M. supplier to VW. Although the RA08 is about 40% cheaper than the Michelin Agilis, in a recent track test comparison in the German magazine ProMobil-Extra it outperformed the Michelin in every single handling test they performed (wet and dry handling, wet and dry braking, and aquaplaning). It is an excellent value and we recommend it highly. "
Hey! Also...I would not let a tire shop torque down your rims to your drums or put your precious Bus on a lift. It's just me...but I believe the folks at most tire shops are likely to over torque your rim nuts. I put Betty on jack stands and brought all five to the local Firestone and let them work their magic without Betty's company.
Good luck!!!!!!!