Trailer wheels (Horndean, PO8)

Two 4.80/ 4.00 x 8 inch Trailer Wheels with Tyres 4" pcd. 65mm hole centre with grease nipple cut out. The rusty one (still solid) holds air, the cleaner one has an inner tube but does not hold air at all probably due to faulty valve. Tyre on rusty wheel has cracks in the tread, the other appears good. Both have plenty of tread left.