For Sale: Summer clearout - Loads of track & road stuff...

Lots of quill to ahead converters have a stem clamping area of 1", then you'd use a 1" to 1&1/8th shim to fit a modern ahead stem. This adapter already has a 1&1/8th diameter, with a nice textured section, which looks better when exposed, through the open clamp of your Thomson, 3t et al. I hope that explains.

ah sorry, I read this as 1'' and 1 1/8th for some reason, which would suggest inversed shim or something