My 2004 Z4 2.2 needs a pair of new run-flat tyres. She currently sits on 'Bridgestone Potenza 225/45 R17 91W RE050A Tyres' all round. I want to keep to these. The last ones I bought a couple of years ago were from a BMW dealer who gave me them at his 'special price' of £175 each. Can anyone recommend an outlet that can supply and fit these tyres at a more resaonable price in the South-East London/North Kent area? Thanks 
