I ran the Latitude RFT and they were an instant upgrade over the OE Bridgestones. Also square in 255/50R19. Later I went with the Michelin Premier LTX in the same size and now 255/55R18. Excellent, excellent tire, just not RFT. Don't know if the Premier LTX is available in staggered fitments.

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8/2011 X5 xDrive35d Sport, Black Sapphire Metallic, Black Nevada Leather, Fine Burr Walnut Trim
2/2001 M5, Jet Black, Exclusive Complete Black Walk Nappa Point Heritage Leather, Black Cubic Trim