Miran
I would certainly not use larger section tyres on the rear for 2 reasons:
1 It will promote understeer
2 The wider section will most likely rub on the exhaust during cornering as clearance is normally pretty minimal
Normally I would recommend using the smaller section tyres on a 4 cylinder Morgan, the wider tyres can make it less responsive.
Do you have , 6 inch wire wheels , or 6.5 inch alloys?
Andy
PS I love Slovenia , I come every year in June to Bovec to kayak on the Rivers Soça and Koritnica. The mountain roads must be great fun in a Morgan.
