I plan to tow a trailer with my X5, I will do a couple test runs, and compare. the air springs are easy to re and re!
the roads are pretty slick here, so i havent had any chance to really test out the "sportiness" of the new bags.
either way, new bags seem to be better than the old ones!
yes, the old ones have more range as far as height goes, ??? maybe thats important!? not sure!

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2003 X5 3.0i (02/2003) sport package, Sapphire black metallic / Black Dakota Sport seats. compass mirror retrofit, trailer hitch retrofit, Prodigy P2 trailer brake controller installed, PDC retrofit, Lumbar support retrofit. heated rear seats retrofitted. Running boards retrofitted and subwoofer install in progress. 4.8is Brakes installed front and back. Bluetooth TCU installed, Rear Fog lights installed. Retrofitted reclining rear seat backs.