Rudge Aero Path Racer

Unfortunately I couldn't use the Rudge chainwheel as the bottom bracket shell was wrecked and had a damaged cup jammed inside. So a Shimano UN55 (I think) was popped in and seems to be holding up. A BLB Pista Vera crankset was a nice traditional alternative.

lovely build! i've nearly finished rebuilding a 50's rudge but am having trouble with the BB - it's the original cottered bb and I've replaced all the bearings, greased it etc but it still doesn't feel completely right unless I leave the axle with a bit of play. have looked into replacing the BB but the shell is 71mm so I understood that normal (68mm) bbs won't work. judging from your post this may not be correct... did you go with a 68mm or 73mm bb?