I'm with TiAgX5, though his aftermarket staggered 19s look mighty fine. Generally, the five spokes [like the 209 18" E70 wheels I picked up, or the 74s pictured] look good on E53s IMHO .......

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2006 X5 3.0 6-spd w/Evo UUC ssk
sport/premium pkgs
born Valentine's Day, 2006.