Add bottle cage bosses to your frame

We do a few frame modifications here at Commuter Cycles and we like to do things properly. Installing water-bottle bosses so the holes are spaced and aligned correctly can be a little tricky. If the holes aren't in the centre of the tube, the bottle sits off to the side. If they're not aligned with the tube, it sits on a twisted angle. The best way to align the holes is with a drilling jig which takes into account all of these sources for error.

We can put water-bottle bosses into steel and aluminium frames without damaging the paint using a stainless-steel ‘nutsert’ or ‘rivnut’. This is essentially a threaded pop-rivet which, installed with a special tool, grips solidly in place. For a more permanent fixing, we can braze bottle-bosses in place prior to powdercoating or painting.

Huw is planning on a long bikepacking trip in the next few weeks and wants to carry more water, so he’s the first to use the new jig. See the photos below for detailed shots of the jig in action.

The process typically costs $40 including hardware ($70 for two sets) for a standard steel or aluminium frame with tubes up to 52 mm wide.