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What headset do I need for my frame?

The specification of the headset you require is determined by your frame’s head tube and the steerer tube of your fork.

To make things simpler universal headset codes can be used to detail the specification of the headset required.

Bearing location refers to whether the headset is a tradition External Cup (EC) fitting, a Zero Stack (ZS), or an Integrated System (IS).

At first glance it might appear complicated, but it is the minimal amount of info required to define a headset now. All the manufacturers are still free to name headsets as they wish (for example Hope may still use letters and numbers) but they will explain the letters and numbers in the above terms to make fitment info universal.

In recent times 4 types of headtube have been used by Orange. Below is a list of what they are including the steerer tubes they are compatible with:

  • Tapered 44mm top and 56mm Bottom - Tapered Steerer (most commonly) or 1 1/8".
  • 44mm Parrellel - 1 1/8" or Tapered Steerer.
  • 1 1/8" Standard Parrellel (34m) - 1 1/8" Steerer only.
  • 49mm Parrellel - Tapered Steerer.

Below is a table giving examples of our most common headsets. If the model you are looking fovr is not here, the in formation will be on the models page on our archives 2015-2019 and 2009-2014



Fork Steerer

Headset Code

Five 2014 >, Alpine 160 2014 >, 

49mm Parallel 


ZS49/28.6|EC49/40 (Hope 4F)

Crush 2016, RX9 , Clockwork 100 and Clockwork 120  

44mm Parellel


ZS44/28.6|EC44/40 (Hope 2H)

RX9 , Clockwork 100 and Clockwork 120

44mm Parallel
1.1/8” Parallel
ZS44/28.6|ZS44/30 (Hope 2B)

322 and 324

49mm Parallel

1.1/8” Parallel

ZS49/28.6|EC49/30 (Hope 4F plus HS136)

Pre 2009-2010 frame with 1.1/8" headtube and steerer

1.1/8” Parallel

1.1/8” Parallel

EC34/28.6|EC34/30 (Hope 1A)
Five and Alpine 160  2011>2013

ZS44/28.6|ZS56/40 (Hope 2E)


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