Steerer Tube Extender
Steerer Tube Extender
SKU:VB-C-STE-18B
In stock
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Ever had trouble fitting a new stem to a fork only to find that the steerer tube is now too short? The Velobike Innovation steerer tube extender raises the height of your steerer by up to 18mm. Precision machined from aluminum, the light weight extender means you no longer have to purchase a new fork for your frameset.
Note: When using the longer 15mm and 18mm extenders, you may require a longer top cap bolt. Standard bolts are normally 30mm long. We sell top caps with a longer 40mm titanium bolt for the steerer tube extenders.
Specifications:
- 10mm, 15mm and 18mm extension heights available
- 50mm deep expansion plug
- Standard M6 insert thread for stem top caps
- Suitable for aluminium and carbon steerer tubes
- Hard anodised black
- 6061-T6 aluminium
- Fits 1 ⅛ (1.125” / 28.5mm) steerer tubes
- Tighten up to 6N/m<
- We strongly recommend to epoxy bond them into your steerer tube for best security
- Weight: 10mm—62g, 15mm—67g, 18mm—71g
FAQ’s:
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Will this fit any bike? The extender can be fitted to any bike with a standard 1 ⅛ steerer tube. This includes many modern road or mountain bikes.
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Is it strong? Yes, This type of expansion plug system is common for steerer tube and headset assemblies. We have opted for a longer 50mm knurled plug for the extra security and stiffness. Most headset plugs are around 30mm. we recommend the extender to be epoxy bonded into the steerer for best security.
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What epoxy do use for install?
A medium/high strength two part epoxy from a hardware store is suitable. Smear a few dabs on each of the three aluminium knurled surfaces before install. This increases the surface friction between the extender and the steerer tube.
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How do I remove it - if its glued in?
If it's required to remove the extender in the future, use the epoxy sparingly. Disassemble the extender, then each of the three blocks can be knocked out without damaging the carbon within the steerer tube.
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Can you make the extension longer than 18mm? In theory yes it is possible to make them longer, however, for safety reasons we have set the maximum height at 18mm. We suggest you have at least half of your stem clamping around your original steerer tube.
- The extender is too large in diameter to fit inside my steerer tube. Every steerer tube can be have different internal dimensions - especially carbon ones where the internal dimensions are variable. We have designed the extender to have a tighter tolerance fit into most steerer tubes than your standard headset expansion plug for safety and security. Prior to purchasing, measure the inside diameter of your steerer tube. If it measures any smaller than 22.50mm, you may need to sand some material out. This intersection zone between the steerer tube and extender is only 3mm deep, so not very much material will need to be removed from the inner edge of your steerer tube. If in doubt, ask your local bike shop for assistance.
© The intellectual property for this product is owned by Velobike Innovation Limited. All rights reserved.
Customer Reviews
simple, well engineered, and easy to use, And well-made. that says it all
I recently switched from 170mm cranks to 160’s and needed to raise the handlebars 10mm. The Velobike extender was the perfect solution. The order was promptly dispatched. New Zealand to USA shipping and delivery was 4 days. Couldn’t have asked for a better product and customer service.
Many of the frames I build, like the TIME ADHX, come with short steering tubes. And in the case of the TIME, which is a Allroead bike, I need more stack under the stem. So, I end up mounting the stem at the very top of the steerer, with one clamping screw at the top edge or slightly beyond. The Velobike Steerer Tube Extender is a wonderful piece of engineering, that perfectly solves my problem, allowing the top clamping screw to exert force on the solid extender, rather than the edge of the steerer tube. Thank you, Luke and team, for producing a beautiful, problem solving product like this!
Just installed and impressed! the 50mm insertion Depth seems to add more rigidity to the hollow tube. Well constructed and worth every penny!
Looking good! I'd recomend to lower the stem by another few mm if possible so more surface area of the stem is in contact with the steerer tube. This will further increase the assembly stiffness, security and safety.
I see that your stem is positioned in a negative angled position (pointing downward relative to the axis of the steerer tube). If you flip it pointing upwards you can lower it on the steerer tube while achieving the same (or very similar) handlebar position. This is a win win for further increased front end stiffness, greater aero gains and a safer assembly =)