Hi guys, I'm looking to buy a set of the 4.6l 20" 5-spoke alloy wheels for my 2002 3.0l X5 E53. All sellers with these wheels have 275/40/20 on fronts, 315/35/20 on rears. One seller has 275/40/20 on fronts, 295/40/20 on rears??.. Can this work, or are they incorrect? What are the disadvanatages & advantages of these different tyre sizes? Any advice will be greatly appreciated, thanks!