Originally Posted by Steve - UK

Lots of reasons to fit 275's at rear:

The standard 255s leave the edges of the rims exposed to catch the curb and get damaged. Slightly wider tyre gives some prtection

275's fill out the rim nicely and look much better

Only 20mm (three quarters of an inch wider) so no impact on fuel consumption/drag. In fact rolling circumference slightly larger so technically speaking reduces engine revs (not so you would notice as difference so small, as per effect on speedometer lol)

They are cheaper than 255's due to the few vehicles that use them (Astons and some big Jags)

Are wasting lots of ££ on Michelins, Prellis and Continentals which wear out in seconds, I believe I found the perfect tyre for the XF. This has fantastic grip in all conditions, superb wear, and price. Thus great value for money. The Falken FK452 was also the chosen regulation tire for the American Le Mans 24 series being fitted to cars with more power and speed than we will ever experience - so easilly up to our needs having same load and speed rating (186mph) as the XF factory Michellin Pilot and Continental Sport Contact 2's. If you want to ask XF owners about tyres, come to a UKC meet and see what they are using. I just bought my third set of Falkens (put them on all 3 XF's) Fronts currently 77.00 rears 154.00 camskill ltd, on line.