Llewellyn – Stem Lugs
The first Design and Form by Llewellyn lug set Year 2004.
Llewellyn Handlebar Stem Lugs
For many of my early frames, I fillet brazed stems. And, even though my fillet brazed stems were very popular addition to my lugged frame sets, I felt that they did not fully match the aesthetic of my lugged frames. A lugged frame should have a lugged stem!
So I made sketches. I needed the option of 1 1/8” fork or 1” fork with a sleeve, and I needed to fit the industry standard of 31.8mm handlebar. Once I sorted all that out in my sketches, I drafted up a set of detailed dimensioned drawings from which I hand-fabricated samples for my first production lugs.
I sent my hand-fabricated samples to LongShen (Taiwan) who interpreted my samples into 3D CAD drawings for their tool maker. LongShen sent the samples they made of their interpretation, and after a few modifications the lugs went into the production in 2004.
The stem lug features are
- Fits 31.8 handle bar
- Fits 25.4 (1” with sleeve) or 28.6 (1 1/8”) steerer tube.
- The stem extension tube is at 84 degrees to the fork steerer axis
- Easy mitring of the 28.6 diameter extension tube and easy perpendicular alignment of the handlebar axis to fork steerer axis.
- Stainless steel lugs to avoid possible corrosion with the handle bar or fork.
- Dependable lugged construction which also compliments the aesthetic of a lugged frame.
- Room on the stem lug’s surface and shore line to allow one to shape to compliment the frame’s lug shape.
I also had Columbus make the 28.60mm extension tube in Niobium material to complete the stem kit and have made this available to other builders.