6341 tire size

[biely036341]

Does anyone know the outside diameter of a new Barum 12.4X24 tire? Mine are dying of old age and am trying to fine a replacement that will match the 16.9X34 rears. Thanks for any help .

 

[diyfarmer]

12.4R24 320/85R24 Is the modern measurement of the tyre size.

 

[biely036341]

Thanks DIY, but I am having trouble finding the diameter or the circumference.