hello there i have some borbets on my fiat grande punto 2 of them came with spiggot rings which are 63.4x57.1mm

i have vibration and ive been told i need correct spigot rings ive been told that the centre bore of my fiat grande punto is 56.6mm and the borbet centre bore is 64mm if im correct im guessing i will need spiggot rings that are 56.6mm x 64mm if someone could help or correct me thankyou.

have you read the FAQs?