Joined: Oct 2002
Posts: 1,368
Likes: 93
From: Los Barriles, Baja Sur, Mexico
Bikes: Look 585, Kirk Terraplane, Serotta Ottrott, Spectrum Super Custom, Hampsten Carbon Leger Tournesol
I believe on Shimano's better sealed cartridge BBs, like the Ultegra, have seals that keep the water and muck out and are tight enough to have a small amount of drag, nothing of consequence. All the Ultegra BBs I've installed have had a very small amount of resistance when turning them manually.
Put 'em in, torque 'em down and don't worry.