martingale2022

I have a vintage austria made sears bike, roebuck,
wheel is 26"
The rear axle nut was missing when I attached my kids trailer to it and I tried the standard 15 or 16 tpi nut, no match.
Bought 3/8" 26 and 24 tpi nuts , all not match.
what size is the nut ?
Post some pictures hope can get some help.

Thanks

martingale2022

How can I post pictures here ?
thanks

Trakhak

You can upload pictures to your "gallery" here, as I understand it.

Most solid axles for rear hubs of bikes sold in the U.S. have traditionally been 3/8 in 26 tpi. But since you tried that and it didn't work, you might have to take the bike (or at least the wheel) to a bike store or a hardware store so that an employee can determine the correct nut size.

martingale2022

I actually did take it to a bike, they told me it should ne 24 tpi, then I bought 24 tpi 3/8", seems a bit small, whats the next size in diameter? 1/2 or 5/8?

FBOATSB

You have pictures in your gallery. Here is one of your hub:

I can't see what hub that is, nor could I say what thread that axle is off the top of my head. Somebody will be along shortly. Here is a link to your gallery: https://www.bikeforums.net/g/album/25278991 There is also a dedicated three speed thread here: https://www.bikeforums.net/classic-v...-3-speeds.html where you could ask.

clubman 

There was a recent post about this. If you have an F&S two or three speed hub, it may have a 10mm/24 tpi oversized axle. Very hard to find these nuts.

Switching to a 3 speed Sturmey Archer hub of the same year might be the best way to go.

martingale2022

do you know how to contact the manufacmanufacturer of the sears 3 speed bike, roebuck & co?
I didn't find their website anywhere. Maybe they don't exist anymore ?

3alarmer 

...most of those made in Austria 3 speeds sold by Sears (that I've seen) used a hub that was manufactured in an Austrian factory, using the designs and specifications of a regular SA hub. They had a special license from SA. The industry was created after WW2, as one of the first steps in rebuilding the economy of that country. Those were made by Puch/ Steyr ( I forget the branding on them now...maybe Steyr ?). But once you get into the 1960's, more of the SA hubs show up. They finally started selling Shimano 3 speed hubs in the 70's, but by then the Sears bikes were coming from Asia.

I think you might be able to try a SA nut on there, and see if it threads on easily. They are pretty specific as to threading. You might be able to find one at an older bike shop near you, if there are any. Otherwise, you're stuck with trying to order one online and see if it works,(not cheap). Or look around for a junked 3 speed you can steal one from. I have a small bucket with 6 or 8 of these hubs, just so I can use them for parts.

52telecaster

That looks like a styre hub and I'm certain it takes the same nut as a Sturmey Archer AW.