26" Schwinn S-6 Lightweight Wheels with "center knurl"?

[Robert Troub]

Do I have that correct.....what exactly are these called?
Came from a mid-60's schwinn I believe?
Center of the wheel is raised

 

[Gordon]

Those are Schwinn S5. The S6 takes the same size tire but does not have the raised center.

 

[Robert Troub]

Those are Schwinn S5. The S6 takes the same size tire but does not have the raised center.

thank you !!!!!

 

[rennfaron]

Should be S5. S6 had the same center knurling but without the raised ridge.
Here is an S5 on ebay right now
Here is an S6 on ebay right now
The S6 ran through the 50s up until '59 and switched to S5. I have found some lightweights with S6 and some with S5 so somewhere in that year it switched over.

I was writing this as @Gordon posted. Basically the same info.

 

[Robert Troub]

Should be S5. S6 had the same center knurling but without the raised ridge.
Here is an S5 on ebay right now
Here is an S6 on ebay right now
The S6 ran through the 50s up until '59 and switched to S5. I have found some lightweights with S6 and some with S5 so somewhere in that year it switched over.

I was writing this as @Gordon posted. Basically the same info.

thanks guys!! you are the best !!!!