Left: the rear wheels are the 1925-1927 20" version instead of the 23" ones used 1919-1924. That's OK, they'll do.

Above: Rear wheels should each have six clamps, but these have only two, and they're the wrong ones. I don't know what these clamps are, but they're not for a TT.

This tire is old enough to have the size designation that was used originally. No tires have been made with these numbers for decades.

This is the more modern version of the same tire. The 6.00 - 20 size is equivalent to the original 32 x 2. I don't see why tires made for antique vehicles don't have the antique numbers on them.

Disassembly is under way, with the cab and headlights removed.