Venn technology - Venn Cycling

Venn technology

Each Venn component is a product of the mathematical sets theory, described by the English Mathematician John Venn.

About us

Venn is a registered trademark of Velocite BVBA, a company registered in Belgium, business number BE0653924807. Your consumer rights are protected by all relevant European Union laws.

Velocite is a multiple award winning, science and technology award focused company and we have been in business since 2008. Some awards that we have won over the years are:

2010 Microenterprise National Entrepreneurship Award winner
2011 Taiwan Excellent Enterprise Quality Award winner
2012 Taipei Cycle Show d&i and iF Award winner
2012 Taiwan Golden Pin Design Award winner
2012 ISPO BrandNew Performance Finalists
2015 Taipei Cycle Show d&i Award winner
2015 Eurobike Award winner
2017 Velofollies Flanders Bike Valley Innovation Award

We hold, or have under registration multiple patents dealing with aerodynamics, carbon fiber composites and carbon fiber composite product manufacturing technologies.


We start by asking why? Why does the component exist and what it is't purpose? What is lacking and how can we make it better?


Once we understand what needs to be done, we focus on finding out how can we do it. We apply advanced CFD and FEA tools and our knowledge of metals, composites and manufacturing methods and make the simplest design that works.


We are familiar with the entire manufacturing sector in Taiwan, and China and know the best manufacturing partners to make the components on time, in full and at a good price


Best products deserve the best support. With locations in Taiwan and Belgium we are able to meet your purchasing needs, and offer local delivery and warranty support.


The Venn philosophy is to deliver cutting edge products using a combination of the most advanced composite product manufacturing methods and functional design, at previously unattainable price-performance levels. The initial products that embody this philosophy are the industry changing filament wound technology (VAR, FWT) carbon fiber composite rims - the Venn Var and Rev series, and innovative composite rims made through an advanced manual layup process - the continuous tangent layup (CTL) rim series. Both the VAR/FWT and CTL rims are available under the Venn brand, or under your custom brand. In addition to VAR/FWT and CTL rims we also offer Venn or custom branded handmade wheels made with our rims and lightweight but durable hubs. The Venn Rev rims and wheels have already attracted industry praise, as well as a prestigious 2015 EuroBike Awards, 2015 d&i Award managed by iF Design forum, and 2016 Golden Pin Design Awards.

Our rim manufacturing technologies

Filament Winding Technology VAR filament winding is the latest version of our original FWT technology. The difference between FWT and VAR is that VAR uses preimpregnated carbon fiber slit tape that is wound directly on a torridal mandrel. The resin is already present on the tape allowing us to use the resins with the highest possible glass transition temperature (Tg) and thus offer even more reliable braking performance.
Filament Winding Technology In FWT filament winding, a continuous tow of fibers is passed through a bath of resin and wound onto a revolving mandrel by traversing longitudinally along the axis of the rotating mandrel. This results in optimal, continuous fiber placement under tension. The benefits - higher manufacturing uniformity, better performance and greater durability.
Manual Continuous Tangent Layup The carbon fiber prepreg each preform follows a is laid up using a special continuous tangential tool and process to achieve relationship to the rim’s a single piece toroidal shape that matches the rim size and profile. The rim is therefore not composed of individual segments or patches. Venn CTL rims are constructed from a single piece rim specific carbon fiber prepreg preform. Circumference thus ensuring that the forces acting on the rim are always evenly distributed across all the plies and individual carbon fibers. CTL is a very high precision process
Key Benefits of Filament Winding over Manual Layup

Better quality and batch uniformity

Since filament winding is a machine managed process there are no random layup errors. Uncontrolled layup errors are one of the biggest drawbacks of the manual layup process. This leads to higher accuracy and precision and further contributes to our lower manufacturing costs.

The best method for manufacture of CFRP

Filament winding is theoretically the best method for manufacturing carbon fiber reinforced plastics (CFRP) as all fibers are placed under constant tension, in a single plane (cf. weaving which crimps the fibers) and in an optimal geometry that has no sharp bends or kinks. This results in the highest possible strength to weight and stiffness to weight ratios.

45 degree fiber bias

Our current winding pattern employs a +45/-45 degree winding bias which results in our rims and wheels having very high lateral stiffness (side to side), but lower than average radial stiffness (up and down). This results in wheels built with our filament wound rims being very stiff and responsive to acceleration, while enhancing road holding and lowering the occurrence of tire pinch flats or rim damage due to impact.


We are the only manufacturer in the world that offers filament wound rims. Thus, besides the performance and cost benefits that our technology offers, you also get a product that is distinct from every generic carbon fiber rim that is available in the market.

Quality advantage

Our machine made rims are superior in terms of quality compared to standard hand made carbon rims

Hand made = high error rate

Machine made = low error rate


Venn Filament Wound Carbon Rims

Unique machine automated winding technology for the highest performing, most consistent carbon fiber composite rims in the market


Our filament wound rim range won several of the highest honours in the bicycle and technology industry with filament winding being recognized as the most interesting carbon rim manufacturing technology in the world.

Manufacturing process

In filament winding a continuous tow of fibers is wound on steel mandrels. FWT process uses dry fibers which are passed through a bath of resin and wound onto a revolving mandrel by traversing longitudinally along the axis of the rotating mandrel. The new VAR process utilises preimpregnated carbon fiber slit tape wound directly into a torroidal steel mandrel.

The advantages of the VAR process over the FWT (Rev) are:

  • superior strength and stiffness
  • better aerodynamics giving better handling and lower drag
  • consistent quality through use of X-Ray machines to scan the rims
  • ability to use wider gravel bike tires at higher pressures due to stronger tire bed

Both FWT and VAR processes result in optimal, continuous fiber placement under tension. The benefits – higher manufacturing uniformity, better performance and greater durability.

Example of the FWT process:

Wind tunnel tested aerodynamics

Venn Rev 35, 507 and 77 rim series are the only OEM rims with wind tunnel data. You can be confident that our rims do not just look aerodynamic, but that they are actually aerodynamic. The results show that the Venn Rev 35, 507 and 77 rims compare very well to much deeper profile rims while offering superior handling in cross winds and lower weight