Threadless External Headsets VH-01
110 gram external cup headset on two sealed cartridge bearings
What It Is and Who It Is For
An external cup threadless headset, fully CNC machined from 6061AL-T6, running two sealed cartridge bearings. The set weighs 110 grams, measures 28.6 by 34 by 30 mm and gives a 33 mm stack height made up of 21 mm upper and 12 mm lower.

Why Buyers Choose This Part
Sealed cartridge bearings
Two sealed cartridges instead of loose balls and races, which is the difference between a headset that needs greasing every season and one that does not.
Machined as a full set
Cups, crown race and compression ring all machined from 6061AL-T6, so the tolerances match each other rather than being sourced from different places.
Five anodised colours
Red, gold, titanium, blue and black, which lets a brand match a headset to a frame without a custom run.
Problems It Solves
- Loose ball headsets need servicing far more often than a sealed cartridge
- Headsets that are not dimensionally consistent make frame assembly slow
- A component range with no colour options cannot match a frame
Who It Is For
- Frame builders specifying a headset for a straight 1 1/8 inch head tube
- Bike brands completing an own-brand component range
- Distributors supplying workshops with replacement headsets
Application Scenarios
- Straight 1 1/8 inch head tube frames
- Complete bike assembly on an OEM production line
- Workshop replacement of a worn loose-ball headset
Technical Features
- 6061AL-T6 throughout, machined rather than cast
- 33 mm total stack height, which matters when you are calculating steerer length
- 28.6 mm steerer interface, 34 mm cup, 30 mm depth
- Two sealed cartridge bearings
Published Specification
| Weight | 110 g per set |
|---|---|
| Material | 6061AL-T6, full set CNC machined |
| Diameter | 28.6 mm x 34 mm x 30 mm |
| Stack height | 21 mm + 12 mm = 33 mm |
| Bearings | 2 sealed cartridge bearings |
| Colour | Anodised red, gold, titanium, blue or black |
Every figure in this table is transcribed from the VALORIDER catalogue specification for this product. Nothing has been estimated.
Product Views



Compared With the Alternatives
The external cup sits outside the head tube, so it carries a taller 33 mm stack than our semi-internal headset at 9.5 mm, but it takes a larger bearing and suits frames that have not been machined for an internal cup. Choose semi-internal where the frame allows it and stack height matters.
Customisation and Manufacturing
Machined parts are cut from solid bar on the CNC side of the Shiyan Town plant. Alloy, tolerance and anodised colour are all specified at drawing stage, and the mark is usually lasered rather than printed so it survives handling and solvent.
- Alloy and tolerance built to your drawing
- Laser marking or engraving on the anodised surface
- Anodised colour matched to an approved sample
- Polybag, card or colour box packing
Fitting and Living With It
Step 1
Confirm the head tube is machined for external cups before pressing.
Step 2
Press the cups square with a headset press, not with a hammer.
Step 3
Allow for 33 mm of stack when you cut the steerer.
Step 4
Preload with the top cap before clamping the stem, and check for play by holding the front brake and rocking the bike.
Others in This Part of the Catalogue

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Semi-Internal Headsets 6061AL-T6
9.5 mm stack height for frames machined to take the cup inside
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View specificationGuides That Cover This Product
AL6061-T6 or AL7075 Which Alloy Belongs in Which Bike Part
Two aluminium alloys cover almost the whole machined bicycle component market. Here is why a star nut is...
Read the guideChoosing a Bike Headset External or Semi-Internal
The frame decides, not the rider. A 33 mm stack against a 9.5 mm stack, and what happens if you specify the...
Read the guideSealed Cartridge Bearings and Why Pawl Count Matters
Two bearings, four bearings, six pawls. What those numbers on a hub or headset specification are actually...
Read the guideThreadless External Headsets VH-01 Questions
What steerer diameter does this fit?
How much stack height does it add?
Are the bearings replaceable?
Can we have it anodised in our own colour?
Quote Threadless External Headsets VH-01
Send the quantity, the destination port and any branding requirement. We will come back with the questions that decide the price.