Are all the bolts on the Sports model Whitworth? I was having a problem mounting a 3 speed shift mechanism to the handlebar. It is the one with the plastic face and a specially designed nut. As is usual with this design the plastic face of the shifter has cracks. I think because the bolt is really too short, a design flaw by S-A. I went to the hardware store to get a longer bolt. Turns out the bolt is not English or metric. I assume it is Whitworth. The nearest to it was 10-32. I bought a few and tapped out the stock nut.
I have a rear rack that I would like to put on this bike. The bolts that hold the fender stays thread into the chain stays and have lock nuts on them. They will not be long enough to add the rack. Are these also Whitworth? I know that the Sports model did not come with a rack like the Superbe. So did the Superbe have longer bolts to accomodate the rack?