What is the OD of a hub for a 30X3 1/2 wheel where the spoke interfaces???
If you mean the hub "nose", the one I have right in front of me measures 2.1875". If you mean the flange diameter, it's 6".
The same hub measurements apply for 30 x 3 and 30 x 3½.
OK, thanks,.....here is my problem. I got a bunch of stuff out of a estate most recently.
A box of spokes I got, measure 9 11/32 +-, hub nose to flat interface with fellow.
If I put those spokes in a Ford fellow which is 20 3/4 ID, I would need a hub nose dia. of 2.030.
If I put those spokes in a Hayes fellow which is 20 13/16 ID I would need a hub nose 2.128.
I have no idea what these spokes are for.
Spokes and fellows came from same place along with a bunch of other stuff, still sorting out.
Any help appreciated.