Sheldon Brown's spirit lives on at Harris Cyclery.
This table is awesome for singlespeed / fixed gear conversions.
http://blog.harriscyclery.com/relative-chainline-bottom-brackets/Bottom Bracket Overall Length Drive Side Length
Sugino/Tange 68-103 103mm 18mm
Shimano UN54 68-107 108mm 20mm
Shimano UN54 68-110 111.5mm 20mm
Shimano UN54 68-113 114mm 22.5mm
Shimano UN54 68-115 115.5mm 23.5mm
Shimano UN54 68-118 118.5mm 25mm
Shimano UN54 68-122 123mm 28mm
Shimano UN54 68-127 128mm 30mm
