Lets skip the questions about why I want to do this, but I would like to run my front brake cable through my headset. This is an older race frame with a 1 inch headset. Most headsets built for this are BMX and I can't seem to find a 1 inch one. So I want to know if anyone knows of any parts that would work for me? Also is there a way to jerry rig the "AheadSet Hollow Cap and Bolt 1 1/8 Threadless Freestyle" to make it fit?

  • bikewagon.com/part/headsets/stem-caps/… could I put a 1 inch cap and 1 inch star nut on this, and it would fit? I assume the bolt is wider than normal bolts. Commented Jan 6, 2019 at 1:10
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    The bolt and star nut for those are both way oversize, plus the hole in the top cap. It would be a metalworking project, but I can imagine trimming down the star nut to size for 1". It's only 1/16" of material all around you'd be taking off. Run it with a 1 1/8 stem with a shim to make the top cap fit right. Commented Jan 6, 2019 at 2:46
  • I have personally drilled a hole down through the center of a bolt (I was making an oil extractor nipple for an alfine11 hub) and given a decent drill press/pillar drill and drill bits, and cutting fluid, and some jig to hold the bolt vertically, it was relatively straightforward. The question is whether you can drill a big-enough hole for the cable outer and leave enough metal for structural strength.
    – Criggie
    Commented Jan 6, 2019 at 5:58
  • Oh hey you might get away using two pieces of outer, and drilling a hole only big enough for an inner cable to pass down through. Essentially making the bolt into two frame stops. That would be one advantage of a mechanical brake over a hydraulic one in this setup.
    – Criggie
    Commented Jan 6, 2019 at 6:03

1 Answer 1


You're looking for a Potts Mod which allows you to route the front brake cable down through the fork's steerer and out to the front brake caliper.

This will allow the front fork/wheel/bars to do a complete rotation without binding on cables.

A Potts Mod does not work for a back brake - for that you require a detangler or to fit coaster brakes, aka back-pedal brakes.

  • yes, in a way, I thought the potts mod was just for threaded headsets. Commented Jan 6, 2019 at 1:06
  • @JohnBurgess same name, slightly different details I guess. Would be quite awesome to use with a hydraulic front disk brake too, but would still be the same name.
    – Criggie
    Commented Jan 6, 2019 at 5:56

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