Schwinn Sales West
Cruisin' on my Bluebird
Sorry, @Schwinn Sales West , I didn't forget about your stack height question. I got wrapped up in trying to compile info for a post about differences throughout the years and quickly realized there are too many to list in one post and maintain any train of thought that a reader would want to follow, so I'll stick to direct questions one at a time and not have to worry about taking a bunch of bikes apart all at once either. I had some headsets separated in an organizer and found they didn't have date stamps on the 64 and 65 ones I set aside. Here's the next best thing to a complete bike, forks that I left the headsets on after stripping the bike, they have the date codes to keep things relevant to this thread.
View attachment 2130982 July 65 26" middleweight fork for the Standard headset.
View attachment 2130983 December 65 26" lightweight fork for the Deluxe Headset. View attachment 2130984 Trying to get the parts in focus with the caliper in shot just wasn't happening, plus there's Always a critic concerned about how to use a measuring device...so I figure simple side by side representations are the best. Straight edge used to better represent the height differences. Bearings are installed in the correct direction here, but the crown race is omitted because it's not important for what we are looking to measure.
The insertion depth of the top cup and top cone looked different at first, but you can see the tiniest gap when put end to end, so small it's not worth measuring. View attachment 2130989
View attachment 2130991 Everything else is identical, so no need to measure any of that. Here is where the first difference is obvious, the standard headset is taller. View attachment 2130997 These are the depths of the assemblies from top rim of threads to the flat surface of the table below. I'd say a +/- of .3mm is plenty of accuracy for what we are looking for. 23.6mm and 22.0mm respectively, that makes the Deluxe Headset stack height 1.6mm shorter.
Next we measure the depth of the threaded area of the cup and cone only, in the same way. View attachment 2130998 11.5mm and 6.8mm respectively. So we have 4.7mm less threaded area to grip with and support the fork steer tube from bulging. Do the math and draw imaginary lines on the fork where the bottoms of the threaded parts stop and they will be 3.1mm apart, or roughly an 1/8" higher for the Deluxe Headset. It's less than I thought after finding that the stack height of the Deluxe is shorter, but I still think that's significant if you were to go about a serious stress test on these parts. It's not going to make me stop riding a bike with a Deluxe Headset, because I don't put these original bikes through that kind of stress or abuse...but now we know something that we didn't before! Ha
@willworkfor
Sorry, @Schwinn Sales West , I didn't forget about your stack height question. I got wrapped up in trying to compile info for a post about differences throughout the years and quickly realized there are too many to list in one post and maintain any train of thought that a reader would want to follow, so I'll stick to direct questions one at a time and not have to worry about taking a bunch of bikes apart all at once either. I had some headsets separated in an organizer and found they didn't have date stamps on the 64 and 65 ones I set aside. Here's the next best thing to a complete bike, forks that I left the headsets on after stripping the bike, they have the date codes to keep things relevant to this thread.
View attachment 2130982 July 65 26" middleweight fork for the Standard headset. View attachment 2130983 December 65 26" lightweight fork for the Deluxe Headset. View attachment 2130984 Trying to get the parts in focus with the caliper in shot just wasn't happening, plus there's Always a critic concerned about how to use a measuring device...so I figure simple side by side representations are the best. Straight edge used to better represent the height differences. Bearings are installed in the correct direction here, but the crown race is omitted because it's not important for what we are looking to measure.
The insertion depth of the top cup and top cone looked different at first, but you can see the tiniest gap when put end to end, so small it's not worth measuring. View attachment 2130989
View attachment 2130991 Everything else is identical, so no need to measure any of that. Here is where the first difference is obvious, the standard headset is taller. View attachment 2130997 These are the depths of the assemblies from top rim of threads to the flat surface of the table below. I'd say a +/- of .3mm is plenty of accuracy for what we are looking for. 23.6mm and 22.0mm respectively, that makes the Deluxe Headset stack height 1.6mm shorter.
Next we measure the depth of the threaded area of the cup and cone only, in the same way. View attachment 2130998 11.5mm and 6.8mm respectively. So we have 4.7mm less threaded area to grip with and support the fork steer tube from bulging. Do the math and draw imaginary lines on the fork where the bottoms of the threaded parts stop and they will be 3.1mm apart, or roughly an 1/8" higher for the Deluxe Headset. It's less than I thought after finding that the stack height of the Deluxe is shorter, but I still think that's significant if you were to go about a serious stress test on these parts. It's not going to make me stop riding a bike with a Deluxe Headset, because I don't put these original bikes through that kind of stress or abuse...but now we know something that we didn't before! Ha
Great job on the comparison analysis @WillWork4Parts. I appreciate you doing the leg work and photos. I guess we are down to about the difference in height is about the thickness of the headset lock washer. My assumption is, if Schwinn thought changing to a Standard headset would have fixed the steerer tube breakage problem they would not have gone to the expense of making new forging dies for the new stem size, changing the inside diameter on all of their forks, and machining new head locknuts. It was quite an expense for the entire bicycle industry, because of the change in CPSC standards. Maybe they just wanted to give us something to talk about in 60 years.
John