No problem.

Both are good tires. I run Nittos in the front and Pirelli Pzeros in the rear on my E53 in sizes described above.

On the F15 we run stock sizes, Continental Extreme Contacts in the rear (315/35/20) and Continental Control Contacts in the front (275/40/20). Took this setup off our E70 and have put about 20k+ miles on the setup with no issues. Tires still holding up nicely.

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2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)

2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)