Tire Valve Terminology

[Original Smith]

I'm trying to help a friend with Buffalo wheels. He bought a set of Blockley tubes for his car which are the wrong size valve stem. I'm wondering if the term Rim Nut is the correct name for the nut that holds the valve stem to the rim. On Buffalo's there is no felloe. I think the name of the nut he needs is called a rim nut. I can't help him because all of my parts are for Model T's. Has anyone knowledge of where the correct rim nut can be obtained?

[RajoRacer]

Kevin Pharis would be the "knowledgeable" one on that subject !

[ewdysar]

They do seem to be called a variety of things, but I believe that you are describing a "rim washer" as seen in this drawing. And yes, they do seem like more of a nut than a washer to me.

Coker Tire refers to them as "reducer nut - wire wheel". The ones that they (and Snyders etc.) sell should fit the tubes that are commonly found today.

Keep crankin',
Eric

[Scott_Conger]

I've often read one of the posters who commonly chastise someone asking honest questions on the Forum to "Do your homework!"

I won't be so rude, even though there's tons of easily found historical documentation available in any number of places including past Forum posts.

Blockley tubes for 30x3(1/2) are, as measured, .476" diameter with a nominal .480 (m12.2 Schrader) spec. These are often referred to as m12 diameter in many reference documents, but m12 is not strictly accurate.

as far as obtaining/making a nut for the above mentioned tube, tell a supplier what you need or else one would need to start with a 12V1 tap, which is the only correct tap for this application (though I'm sure that there are hammer and chisel folks who could cobble something out of a thin piece of brass and the wrong tap), meaning, m12x1 is NOT the same as 12V1, though they are remarkably close.

Since I am not looking at the specific tube for the specific wheel in question, I cannot comment as to whether my information applies to the specific application in question - more information would be needed and I'm surprised it was not relayed from the start.

[Steve Jelf]

All tubes sold with metal stems today have larger stems than what Ford used. While Fords were the most common cars of the time, the thicker stems used on other cars have survived in greater numbers. You can install your own stems of either size, along wih properly fitting dust covers and othet attaching hardware. There are enough surviving stems of both sizes that neither should be very costly.


https://dauntlessgeezer.com/DG110.html

[Allan]

There are two types of those nuts. One is just like the one in the drawing. The second has an externally threaded collar onto which a dust cover can be screwed. it saves having to screw the cover on all the way down the threaded stem. Larry, tell your friend I can supply the first type to fit those way oversized Blockley stems. Then he can use Dill valve dust covers.

Allan from down under.