This will be a short one. Everybody may already know. I bought a couple schwinn heavy duti's from a guy and they had the 1 1/8'' neck on them . I wanted to run another fork I had but it was too small. I found if you cut a piece of 1'' ridged conduit about 1/4 shorter than your neck size then it would slide tight into the bigger neck . It will take the smaller bearing races. Once you tap in the races it stays tight. Then use the regular size forks. If you cut it the same length as the neck tube then you can see it . You could drill a hole down a half inch or so and tac weld it inside the neck ,but once the races are in it cant go anywhere anyway. Good luck. :roll: