Lower Lug to Fit Tapered Columbus and Tange Head Tube – Stainless Steel
$29.50
This is the stainless steel version. ! IMPORTANT – READ THIS ! Stainless steel CANNOT be brazed with bronze filler. Silver alloy filler is required, with the correct flux for for the specific filler and stainless steel, along with careful fitting to achieve brazing clearance, cleanliness, surface preparation and control of post-prep oxidation as well as excellent heat control when brazing. Please be aware of this and read up on how to braze stainless steel before attempting it. Make practice joints and cut them open to verify you’re achieving proper flow through the joints. AND – please know that stainless steel has a much higher shrink rate coming off the casting process, so they’re a very tight fit. Expect to spend some time getting the fit correct. In particular the “wings” will probably need some shaping and depending on the tube exact diameters you’ll likely need to file/sand/grind the IDs to fit. Go slowly and carefully until the brazing clearance is correct everywhere.
Want to use a carbon fork in a lugged frame? Most carbon forks have tapered steerers and won’t work with a typical 36mm head tube. Columbus and Tange have created an elegant tapered head tube, 46mm OD at the bottom and 36mm OD at the top, but until now a lower lug to fit hasn’t been available. This investment cast stainless steel lug solves the problem. It’s designed with enough extra surface to allow it to be shaped to match existing 36mm top lugs, or it can be used as-is with no carving. It can be polished to a very nice surface finish and left unpainted, or it can be painted. See the drawing for full dimensional specs. Also available in steel – see product list.