Bicycle headset

The headset is the rotating interface between the bicycle frame and forks. Basically it is a set of bearings in specially constructed cages concealed in the top and bottom ends of the head tube at the font of the bike which allow the fork to turn in the frame. The bottom cage is between the fork and head tube while the top cage is between the handlebar stem and frame.

There are two main types of headsets - threaded, also known as Quill, and threadless; the main difference being how they are connected to the fork.  .

Threaded headsets are in cups on the outside of the frame and held in place via a locknut around a threaded fork. This is the traditional version of the headset and is only available in a 1" diameter.

Threadless headsets sit in cups either on the outside or inside of the head tube and are held in place by the stem clamping round the fork steerer tube. Threadless headsets are available in several different sizes - 1", 1 1/8", 1 1/4" and 1.5" with size depending on the type of bicycle and its intended use.

Related Reviews

Cycling UK stand at the London Bike Show 2017

Bike shows can be cruel events. They remind me of my more youthful days when I’d visit my local toy shop and gaze longingly at the Lego sets that were out of reach both financially and...

Swansea scenery

A circular route of 105 miles with an elevation gain of 4,600 feet. This spectacular route takes us over the Black Mountains and up to the Gold mines at Dolacothi and then winds its way back to...

Share this article

  • Patron: Her Majesty The Queen
  • President: Jon Snow
  • Chief Executive: Paul Tuohy
  • Cycling UK is a trading name of Cyclists’ Touring Club (CTC) a company limited by guarantee, registered in England no: 25185. Registered as a charity in England and Wales charity no: 1147607 and in Scotland charity no: SC042541. Registered office: Parklands, Railton Road, Guildford, Surrey GU2 9JX.

Copyright © CTC 2016

Terms and Conditions