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Stingray strut (high loop)

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Here are several Factory Original Stingrays with their High Loops showing the axle mount area with the vertical rectangle drain/weep hole and PERSONS stamp.

That last high loop on the HA Lime shows the late design strut that Livmojoe showed.

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A sad situation for this later 65 version high hoop, one side cracked thru and the other side ready to go, just leaning against the wall I looked down and that other side was bending over😩!! ( I'll have to put a piece of pvc or something over it to protect in in the meantime ), not sure what I can do and I guess this has always been a problem as you see on my 65 J38-1 ( LA ), looks like the repair was done long before I got it 25+ yrs ago ( pretty sad looking also but works ) have kept it on because it's OG, guess I can always repair this the same way😉, the reason the paint/scrapes look in the last pic is a good story for another thread!, I'll have to back and see if I've told that story before?

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A sad situation for this later 65 version high hoop, one side cracked thru and the other side ready to go, just leaning against the wall I looked down and that other side was bending over😩!! ( I'll have to put a piece of pvc or something over it to protect in in the meantime ), not sure what I can do and I guess this has always been a problem as you see on my 65 J38-1 ( LA ), looks like the repair was done long before I got it 25+ yrs ago ( pretty sad looking also but works ) have kept it on because it's OG, guess I can always repair this the same way😉, the reason the paint/scrapes look in the last pic is a good story for another thread!, I'll have to back and see if I've told that story before?

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Well that's a bummer, however, I bought a 63 no crimp Persons strut that was cracked like that at a swapmeet. Had my buddy with a mig welder repair it and then sent out for chrome - invested a little but looks good as new now
 
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For all the “sturdiness“ that Schwinn was known for in their bicycles, there were a few things like the Stingray seat struts that were sometimes faulty.

I have an early style high loop strut with a couple modifications.
A hole has been drilled on each arm, plus a reinforcement has been welded at the weak link axle mount hole.
There is not enough material on the sides of the 3 adjustment holes needed to support the riders weight especially during side movement.

The first non crimp square back struts (63, early 64) would tend to fracture at the hole for the Q bolt location also.

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We need to go back to the first Stingray strut to understand a few things about the High Loop and it’s design.

Here is solid information I’ve accumulated over the decades pertaining to the 63-64 square back PERSONS strut and the 64-1/2 thru 1965 High Loops.
The first two photos are low resolution that I took maybe 20+ years ago showing the progression of the square back struts.
The 1963 Schwinn Stingray had a strut without a crimp at the Q-bolt hole and a very small round drain hole at the bottom. This strut is also found on the early 1964 models.
Later in 1964 these struts had a large crimp at the Q-bolt hole area to make for a much stronger design.
The last square back strut design now had a vertical rectangle drain hole at the bottom. This style of drain hole continued on the majority of the High Loop strut.

The last four photos are of an NOS late ‘64 strut with the large crimp and a new design drain hole.

PS, notice on the very first 1963 strut there is a PAT. PENDING stamp at the bottom.
This strut was only used on the early Stingray models.

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We need to go back to the first Stingray strut to understand a few things about the High Loop and it’s design.

Here is solid information I’ve accumulated over the decades pertaining to the 63-64 square back PERSONS strut and the 64-1/2 thru 1965 High Loops.
The first two photos are low resolution that I took maybe 20+ years ago showing the progression of the square back struts.
The 1963 Schwinn Stingray had a strut without a crimp at the Q-bolt hole and a very small round drain hole at the bottom. This strut is also found on the early 1964 models.
Later in 1964 these struts had a large crimp at the Q-bolt hole area to make for a much stronger design.
The last square back strut design now had a vertical rectangle drain hole at the bottom. This style of drain hole continued on the majority of the High Loop strut.

The last four photos are of an NOS late ‘64 strut with the large crimp and a new design drain hole.

PS, notice on the very first 1963 strut there is a PAT. PENDING stamp at the bottom.
This strut was only used on the early Stingray models.

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Where do the small crimp 64 style bars fit in? I've seen the no crimp bars used until D4 or so, and all 3 of my H4s & my M4 have the large crimp bars. Just curious, always learning...
 
quitewon,

The square back struts were next on the list for this thread.

The factory installed struts started as a “non-crimp“ version from May ‘63 to May ‘64 (+ -)
I show the “non-crimp“ strut from a D4 ‘64 Fair Lady, another from a Schwinn store dated 5-30-64 and the “non-crimp“ that came on my Original E4 May ‘64 Opal J39.

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Somewhere around May ‘64 / June ‘64 the switch was made to the “long crimp” strut that was a much stronger design.
This factory installed strut finished out the remainder of the ‘64 build.
This strut is shown on my Original H4 J39.

The “small crimp” strut was an over the counter version that would typically come separate or boxed with a Polo seat.
Below are samples.

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quitewon,

The square back struts were next on the list for this thread.

The factory installed struts started as a “non-crimp“ version from May ‘63 to May ‘64 (+ -)
I show the “non-crimp“ strut from a D4 ‘64 Fair Lady, another from a Schwinn store dated 5-30-64 and the “non-crimp“ that came on my Original E4 May ‘64 Opal J39.

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What are your thoughts on the era of usage for the non-crimped, non-stamped(Persons) square back sissy bars?
 
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