I can now say that the original tyres were 155/65 13 on 4in rims
I've found that using 4.5in rims from a Cuore/Kelisa fitted with 165/65/ 13 Michelin Energy E3B tyres does wonders for the handling - much less understeer - and helps with economy.
The change in diam is about 2.45% and makes the speedo about 2mpg nearer the true speed (as standard, the speedo overeads by 5mph)
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