Posedla introduces most mass customized 3D printed saddle yet

The search for the perfect bike saddle is something nearly every cyclist has experienced. Hours in the saddle can turn from joy to misery if comfort is lacking, and even the smallest misfit can lead to numbness, pressure, or long-term discomfort. In recent years, advances in technology and ergonomics have reshaped the cycling saddle industry. Companies like Posedla, Fizik, Specialized, Trek, and Selle SMP each offer their own solutions, yet Posedla is the only one targeting full mass customization capabilities via MJF 3D printing.

Posedla’s flagship product, the Joyseat, stands as the world’s first fully custom 3D printed saddle created on demand for each rider. Unlike many companies that mass-produce 3D printed saddles and offer full customization only at a high professional level, Posedla builds every Joyseat individually, tailored to the cyclist’s anatomy and riding style.

Making the Posedla Joyseat

When Posedla’s founders began imagining a saddle that could perfectly fit each rider, they underestimated the challenge ahead. The road from concept to product was long, often discouraging, and at times nearly abandoned. But the conviction that such a saddle could exist pushed them forward. Today, every Joyseat delivered to its owner—complete with the rider’s name—is a point of pride and a testament to perseverance.

By tailoring each saddle to the customer’s sit bone width, flexibility, body dimensions, and riding discipline, Posedla has become the first company to offer a saddle that is not only designed but also manufactured uniquely for each cyclist. The company goes as far as sending out a “3D butt measuring kit” called the “Smiling Butt Kit” for pinpoint comfort mapping of the sit bone. The data is used to fine-tune saddle size and shape based on user BMI, flexibility, gender, and other personal data. The process also considers riding hours, mileage, and style to create the ideal stiffness and support zones for your needs.

As the Joyseat is not a universal design, it has to be built using an industrial 3D printer. In this case using Multi Jet Fusion (MJF) technology. The upper section is formed from a patent-pending lattice structure made of thermoplastic polyurethane (TPU), which allows the saddle to flex and respond differently across zones. This unique structure ensures that the nose, sit bone area, and sides all provide the exact stiffness or softness the rider requires. Beneath the lattice, the rails and shell are constructed from carbon fiber, balancing strength and weight.

A 3D printed ticket to ride

To appreciate what Posedla has achieved, it helps to compare it with more traditional leaders in the saddle market. Fizik has long been a household name among professional riders, with models like the Arione and Antares that suit different anatomies. More recently, Fizik introduced the Adaptive range, which incorporates 3D printed zones for comfort. These, however, are still mass-produced and lack full customization options.

Specialized takes another approach through its Power line, designed with Body Geometry technology. Shorter and wider than traditional saddles, the Specialized Power series is shaped to reduce pressure on soft tissues, validated by medical studies. It has become one of the most popular saddles, yet personalization stops at choosing between predetermined widths.

Trek’s Aeolus saddles are engineered with the aerodynamic rider in mind. Short-nosed and aggressively cut out, the Aeolus caters especially to triathletes and road racers who spend much of their time in an aero tuck. While highly effective in that niche, they are less versatile for gravel or endurance riders.

Selle SMP is perhaps the most distinctive, with its dramatic drop-nose and wide central channel. These saddles look unconventional but are praised by cyclists who suffer from severe soft-tissue pressure or nerve compression. For some, Selle SMP is a lifesaver; for others, the extreme design feels awkward.

While the bigger brands (and Selle SMP) utilize Carbon DLS technology, Posedla is the only one among these to use MJF. When it comes to weight, Posedla’s Joyseat ULTRA competes directly with the lightest on the market, at around 155 grams.

Either way, it appears clear that for just about every type of requirement, 3D printing is going to be the way to ride into the future.