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Current Lead Times: Simple-Custom Framesets: 1 week. Full Custom Bikes: 7 weeks.

U.S. Built Custom Bicycles in Titanium and Titanium-Carbon Mix

Tools of the Trade Part Three: Duff Vertical Mill

Duff’s were made in Haverhill, MA, just up the road from us. They are smaller than most mills of that vintage, and many of them went to hobbyists half-a-century ago. We like them because they’re more easily moved than their larger cousins, and they take up less floor space. Their distinctive green paint also livens up the shop a little. Our favorite Duff bores our titanium stem tails to perfect roundness.