Nederlands | English | Deutsch

Project Sports

Questions and answers about sports

Can I fit any headset to steering column / head tube as long as it is threadless and same diameter?

5 min read

Asked by: Heather Demientieff

You can do this freely as long as the new headset is the right cup size for the head tube. The crown race ID of the new headset also has to be correct for the new fork, but 1″ threadless forks and headsets use the 26.4mm ID size almost universally (maybe actually universally but there’s always an oddball somewhere).

Are all threaded headsets the same size?

Threaded headset sizes are designated by the outer diameter of the steering column. This can seem confusing, because the head cups do not measure the named standard. The threaded standards are 1 inch, 1-1/8 inch, and 1-1/4 inch headsets. The various standards are generally not interchangeable.

How do I know what headset fits my bike?

The identifier starts by describing the headset type with a two letter code – ‘EC’ stands for external cup; ‘ZS’ for zero-stack/ internal headset; and ‘IS’ for integrated headset. The number following the headset type denotes the head tube bore diameter (or bearing/cup outer diameter).

Can I use a threaded fork with a threadless headset?

A threadless headset works with a fork that lacks threads on the steerer. Moreover, each steerer is the same length and is cut to a different size depending on rider preference. The steerer is normally 1 1/8 inch in diameter. A bike stem is not inserted into the steerer but slides onto the steerer.

How do you measure the diameter of a head tube?

You need to measure it in two places. The outside diameter (OD) of the top section (where the stem clamps around, as in the above pic) and the outside diameter of the very bottom bit where the steerer goes into the fork crown (where the headset crown race sits, as in the pic below).

Do you grease steerer tube?

Greasing an aluminum steerer isn’t normally necessary, but can be helpful because it’s possible for the aluminum to corrode in some situations. A thin coat of grease prevents this.

Should you grease headset bearings?

The headset bearings are one of the most common points to grease and it is advisable that in addition to greasing the bearings, you also grease the fork crown and in the frame where they sit, as well as the rest of the steering parts, but you must be careful not to grease the steerer tube at the point the stem is

Can you change a quill stem to Threadless?


Quote from video: As easily with its with a threaded stem. What you need is a Threadless stem adapter.

Can you use a quill stem on a threadless fork?

The most common threadless conversions use a simple pipe with a quill wedge to lock in place of an existing quill stem. Then your stem clamps to that. The issue with these is that you retain the same threaded headset and simply introduce additional ways for things to go wrong.

How do you install a threadless stem?

Quote from video: They will also have two two six bolts securing the faceplate. And in some cases they hook on with one side and bolt on with the other. Stems come in different steer tube and handlebar sizes.

Should you grease your stem?

Unless you want want of those circus bikes where your wheel goes in a different direction to the handlebars. A quill stem going in a steel steerer should be greased a little though. Simple rule: Grease anything where metal comes into contact with metal.

Do I need headset spacers?

Put simply, headset spacers enable you to easily adjust the height of your handlebars, which is an essential element of bike fit for BMX, MTB and road riders. In the particular case of the latter (road cycling), the correct bar height is key for comfort and performance.

Do all forks need a crown race?

Quote from video: Похожие запросы

How are threaded headset sizes measured?

Measure the inside and outside diameter of the fork at the top where the stem goes in – if the outer dimension is 25.0 mm and the internal dimension is 22.0 mm the headset you require is French. If it is 25.4 mm on the outside and 22.2 mm on the inside then it is ISO/JIS.

What size are my headset bearings?

Measure the widest portion of the inside of the bearing while keeping the tool square to the flat edge of the inner bearing race. This is the internal diameter. Now measure the widest portion of the outside of the bearing while keeping the tool square to the flat edge of the outer bearing race.

Are Crown races headset specific?

NO! Not all headset cups and crown races are the same. There are different angles on the bearings both the inner and outer surfaces. You need to make sure that the cups and races match the bearings.

How do you remove a threaded headset?

Quote from video: Now to remove the crown race which we'll do with a crown race puller.

How do you make a headset removal tool?

Quote from video: Remover tool all your going to need is a piece of EMT. And hacksaw. And some safety glasses. Optionally. You can get a dremel tool or something with a cut-off wheel to make it a little faster.

Can you replace caged bearings with sealed?

Sealed bearings are precisely machined and assembled, removing the cage is difficult and not advised anyway. When sealed bearings each the end of their useful life, they’re easy to replace as a unit. Replacing a bearing cage and bearings as you might the loose bearings of a cup-and-cone headset design is impractical.