Seems like a pretty old frame, my guess is ~1960's. I'm not especially attached to the saddle but would be nice to keep in more tradish
by febuste
Seems like a pretty old frame, my guess is ~1960's. I'm not especially attached to the saddle but would be nice to keep in more tradish
by febuste
12 Comments
That is one wild fork and frame combo. When you get it all done up be sure to share it to r/xbiking
I wouldn’t trust the measurement ascertained by holding a ruler up to it. To get an accurate measurement, you need to use a pair of calipers. Otherwise, most bike shops will have a sizing rod they can drop into the frame and measure for you.
It’s possibly actually 22.2 or 7/8”, which is an old American size.
My first question would be: will that seatpost come out of there?
It’s an American made frame, so the seat post will be in inches. 3/4 would be 19.05mm, 13/16 would be 20.63mm. I’d guess it’s from the 1940’s, to early 1950’s.
That’s not how you measure a seatpost. Use vernier calipers with .1 mm increments. The exact number is what you seek.
13/16 was a common size for pre-war cruisers. The rear facing forkends on the frame would suggest that you have a pre-war frame. By 1946 when post war production of consumer frames really restarted, rear facing forkends had been pretty much replaced by the horizontal “safety” dropouts.
It’s literally just a piece of steel tube.
Can’t imagine it would be hard to find.
Likely 13/16″, as others mentioned. An old American size, including on Chicago-built Schwinns and on aluminum old-school BMX bikes such as Race Inc. Therefore, they can be had from places like this: [https://www.porkchopbmx.com/13-16-207mm-cr-mo-bicycle-seat-post-with-7-8-seat.html](https://www.porkchopbmx.com/13-16-207mm-cr-mo-bicycle-seat-post-with-7-8-seat.html)
I think the size is about 22mm…actually 21.89mm or 0.862 ”
Like a 7/8″ (0.875″).
That’s about the diameter of an old steel handlebar.
It’s a really common size of tube and used for a lot of products…so you should be able to find whatever length you want.
Was that a rear hub motor ebike in a past life?
While you wait for the new post to arrive, you gain a little leg extension by turning the seat rail clamp around the other way. It’s opposite to the typical orientation at the moment.
That’s pre ww2 my friend.
Old American is either 13/16”, 7/8”, or 5/8”. Yours is probably one of the first too. You can check it using an adjustable wrench and any old tape measure.
1/8 wall 6xxx Aluminum tube stock can be bought at a reasonable price from Mac-Master Carr. Buy something long enough and cut it to a sensible length. I’ve done this twice now on my old rides. Having the seat right turns them into a proper bike.