Head Angle Change Head Set

The geometry of the bike we ride is responsible for a lot of what we consider "Fun Factor". However, changing geometry on most bikes is almost impossible if this feature was not part of the original design.
Cane Creek makes adjustable headsets that change head angle up to 1.5 deg, but these headsets are available for 1.5" head tubes using 1.1/8" steering tubes. .

There is no such mechanism for 1.1/8" head tubes with 1.1/8" steering tubes or 1.5" head tubes with 1.5" steering tubes.
The Head Angle Set (HAS) is a headset that allows the steering tube to run at an angle inside the head tube, thus changing the overall head tube angle of the bike.

It all began when I found myself looking for a way to slacken the head tube angle on my Trail / AM bike to make them more suitable for the technical single-tracks I love to ride. I have played with the idea for about 6 months before designing my first angled headset. The angle change was 1.7 degrees, resulting in a head tube angle of 66.5 degrees, exactly what I was looking for based on previous experience.

The basic design assumption is that we can change the angle of the steering tube inside the head tube by designing special angular bearing cups that are not concentric with the head tube. This design is heavily dependant on head tube length and the desired angle.

Every set it designed for a specific head tube length with a specific angle change according to the rider's request.

The cups are machined on a highly accurate computerized milling machine. (CNC) the parts have some critical dimensions that have to be accurate to 1/100mm

Inaccuracy in designing or machining angular bearing cups will result in undesired ride characteristics and will cause the bearings and cups to wear and fail very quickly.

The design is not limited to 1.1/8” head tubes, and can provide a solution for almost all head tube diameters. For example, the first set is designed for 1.5” head tube with 1.5” fork with an angle change of 1 degree. (Banshee Rune)
The second is designed as a zero stack headset inside a 1.5" headtube with 1-1/8" fork and an angle change of 2.5 dgrees. (Ironhorse Sunday)

This design is for a Zero Stack / Semi Integrated head tube, notice that the upper cup was converted to an external cup to allow relocation of the upper bearing. (This one was designed for Giant Reign).

This design is for tapered head tube, "matching zerostack" 44mm/56mm. (Niner WFO).

This design is for head tubes with integrated headsets (cup less), 41mm and 42mm.

The installation of the angular headset is the same as a regular headset, with one exception, the cups must be aligned, there are alignment marks on both cups. The marks should be aligned with the midpoint of the head tube and face forward.