Not sure where you are in the UK, but if in the Midlands area, talk to Paul Harris Tyres - not far from the Belfry... Nearly 80 miles away for me, but that's where I always go for Morgan tyres
Seconded, he's a very knowledgeable chap. It was him that first introduced me to Vredesteins.
Tim H. 1986 4/4 VVTi Sport, 2002 LR Defender, 2022 Mini Cooper SE
