John,
I think you have said that the K1 is Romford wheels. Now assuming that
the frames aren't already pushed out wider than they should be to allow
for 16.5 gauge, there are some extensions made to screw onto the
threaded part of the shaft. They replace the Romford wheel nuts, but
they are brass. They won't last very well if you use them as the bearing
part of the axle, but could you set them up on a dummy axle in the
lathe, turn then down until you could push some steel tubing over them
and then turn the steel tube down to eighth inch. I got my brass
extensions from Colin Ashby. Colin and Val have now retired, but I
notice were back on the stand at the NEC. It now trades as Colin Ashby
2004 or some similar title.
Frank
