I too had to replace a set of 14 x 6 -5 tyres on my Aeronca C3, after seventy years service they were showing signs of wear. The late Ben Cooper had given me a pair of NOS Dunlop streamline tyres that worked for a while but 70 years of storage caught up with them and they too perished and had to be replaced.

I took a wheel rim to LAS at Okehampton and found a Goodyear 380 x 150 -5 tyre could be persuaded to fit. The tyres are larger in profile than the 14 x 6 -5 which might interfere with the undercarriage trouser. For me the larger profile and footprint is useful, having a distinct weakness for off-airport operations. Two new industrial inner tubes were fitted at the same time, bought mail order from Tyre-Rite at Liskeard, cost less than a tenner for the pair, inc P & P.

Attached photograph courtesy of Steve Rendle (Bring back EGDG) / Flickr