Quax Seatpost ø 25.4












Item sold individually .
Qu-Ax 25.4 mm seat tube for unicycle
This Qu-Ax seat tube allows you to replace a worn, bent or too short tube on your unicycle. It is available in several lengths to suit different body types and uses. and to the needs for adjusting the seat height.
This sheet lists four models available as options: 200 mm , 350 mm black , 400 mm black and 700 mm chrome . All these models have a diameter of 25.4 mm , a standard used on the majority of Qu-Ax unicycles.
On Qu-Ax brand unicycles, the 25.4 mm diameter is used on almost all standard models. If you own a unicycle of another brand, be sure to check the diameter before ordering.
Check compatibility with your unicycle
Before ordering your seat tube, Remember to check the inner diameter of your fork tube. unicycle . The most common diameters are 21.9 mm, 22.2 mm, 25.4 mm and 27.2 mm.
To take this measurement correctly, ideally use a caliper. The outer diameter of the seat tube must match the inner diameter of the frame. A small difference in measurement can be enough to prevent assembly.
What length should I choose?
The 200mm seat tube is a short model. It is generally intended for children. for small riders or unicycles where the saddle must remain very low.
The 350mm seat tube length is suitable for most users and allows for comfortable adjustment. on many unicycles.
The 400mm seat tube offers more adjustment range. It is particularly useful for tall people, unicycles shared between several users or when the saddle needs to be mounted higher.
The 700mm seat tube is a very long version. It can be useful for specific builds. for significant adjustment needs or to be precisely cut to the desired length.
Upon receipt, if your tube is too long
If the seat tube is too long for your needs, you can shorten it using a tube cutter. or a hacksaw. Remember to deburr the cut cleanly before reassembling the saddle.
Technical specifications - 200 mm seat tube
- Diameter: 25.4 mm.
- Length: 200 mm.
- Material: steel.
- Colour: chrome or black depending on availability / option available.
- Compatibility: Most Qu-Ax unicycles use a 25.4 mm seat tube.
- Use: short model, generally suitable for children or low saddle settings.
Technical specifications - 350 mm black seat tube
- Diameter: 25.4 mm.
- Length: 350 mm.
- Material: steel.
- Colour: black.
- Compatibility: Most Qu-Ax unicycles use a 25.4 mm seat tube.
- Use: replacement, saddle height adjustment or repair.
Technical specifications - 400 mm black seat tube
- Diameter: 25.4 mm.
- Length: 400 mm.
- Material: steel.
- Colour: black.
- Compatibility: Most Qu-Ax unicycles use a 25.4 mm seat tube.
- Use: ideal for larger sizes or to obtain more adjustment range.
Technical specifications - 700 mm chrome seat tube
- Diameter: 25.4 mm.
- Tube thickness: 2 mm.
- Length: 700 mm.
- Material: steel.
- Colour: chrome.
- Compatibility: Most Qu-Ax unicycles use a 25.4 mm seat tube.
- Use: very long tube, suitable for specific needs or for custom cutting.
Photos of the 200mm model
The photos below show the Qu-Ax 25.4 mm seat tube in 200 mm length .
Photo: 200 mm model.
Photo: detail of the seat mounting of the 200 mm model.
Photo: Top view of the 200 mm model, showing the saddle mounting holes.
Photos of the 700 mm chrome model
The photos below show the Qu-Ax 25.4 mm seat tube in 700 mm length, chrome finish .
Photo: 700 mm chrome model.
Photo: 700 mm chrome model.
Why replace a unicycle seat post?
A seat tube can bend after a fall, or become too short as the user grows. or no longer allow for a comfortable adjustment. Replacing this part will extend its lifespan. the lifespan of the unicycle without having to change the entire saddle or frame.
Key features of the Qu-Ax seat tube
- Standard Qu-Ax: 25.4 mm diameter suitable for the majority of the brand's unicycles.
- Robust construction: steel tube designed to withstand the stresses of unicycling.
- Several lengths available: 200 mm, 350 mm, 400 mm or 700 mm depending on the user's size and the desired setting.
- Simple installation: quick assembly with the usual tools for maintaining a unicycle.
- Cuttable: the tube can be shortened if necessary.
Compatible unicycle saddles
This is not an exhaustive list, but it includes the saddles available on our website.
Warranty and after-sales service
This product is covered by the legal guarantee of conformity. Our team remains available to assist you. Please check the compatibility of the seat tube with your unicycle before ordering.
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Hello, I would like to know the thickness of the steel in your seat tubes. Thank you.
The thickness of the seat tube measures 2mm.