Joined: Jan 2010
Posts: 9,797
Likes: 1,761
From: Northern California
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
On my Pro-Tour, I recall using the 127.5 bb with the AT's, no spacer and 3 rings, but you never know when you might have to offset a bb with a spacer until you test-fit it on the particular bike.
Smaller rings may need less spindle length and less chainline offset.