If you're ever travelling from Dublin to Cork on the N8/M8 there's a tyre wholesaler - The Rathcormac Tyre Center that is as cheap as
www.eiretyres.ie when you add on the fitting charge/disposal charge you have to pay a local tyre center to fit tyres bought from eiretyre. The garage is between Fermoy and Cork in a lil town called Rathcormac. I buy all my tyres there now at almost wholesale price!