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Joyseat Saddle: Tailor-Made Cycling Seats for Every Rider via MultiJet Fusion 3D Printing

September 21, 2025 Applications Posedla Joyseat 101

For cyclists, an ill-fitting saddle can transform hours of riding enjoyment into pure agony. Even the slightest mismatch in size may lead to muscle numbness, pressure points, and even long-term discomfort.

In recent years, advancements in technology and ergonomics have revolutionized the bicycle saddle industry. Brands such as Posedla, Fizik, Specialized, Trek, and Selle SMP have all introduced their own innovative solutions. Among these, Posedla stands out by leveraging MJF (MultiJet Fusion) 3D printing technology to achieve mass customization capabilities for the general public.

Posedla's flagship product, the Joyseat saddle, is the world's first truly on-demand fully customized 3D-printed saddle tailored to individual cyclists. While other brands also produce 3D-printed saddles, they typically reserve full customization only for high-end professional products. In contrast, every Posedla Joyseat is uniquely crafted based on the rider's anatomy and cycling style.

When Posedla's founders first envisioned "creating perfectly fitted saddles for every cyclist," they underestimated the challenges ahead. The journey from concept to finished product was long and fraught with setbacks, with several moments where they nearly gave up. Yet their unwavering belief that "such customized saddles must be achievable" fueled the team's perseverance. Today, every Joyseat delivered to customers is even engraved with the rider's name.

To ensure precise saddle adaptation, Posedla meticulously considers each user's sit bone width, body flexibility, physique data, and riding style. This rigorous approach has made Posedla the first brand in the industry to achieve truly bespoke production—where every saddle, from design to manufacturing, is exclusively crafted for one specific rider.

Guide: For cyclists, an ill-fitting saddle can turn hours of riding enjoyment into pure agony. Even the slightest mismatch in size may lead to muscle numbness, pressure points, and even long-term discomfort.

In recent years, advancements in technology and ergonomics have revolutionized the bicycle saddle industry. Brands like Posedla, Fizik, Specialized, Trek, and Selle SMP have all introduced their own innovative solutions. Among these, Posedla stands out by leveraging MJF (MultiJet Fusion) 3D printing technology to achieve mass customization capabilities for the general public.

Flagship Product: Joyseat Saddle
Posedla’s flagship Joyseat saddle is the world’s first truly on-demand, fully customized 3D-printed saddle, tailored to individual cyclists. While other brands also produce 3D-printed saddles, they typically reserve full customization for high-end professional products. In contrast, every Posedla Joyseat is uniquely crafted based on the rider’s anatomy and cycling style.

When Posedla’s founders first envisioned “creating perfectly fitted saddles for every cyclist,” they underestimated the challenges ahead. The journey from concept to finished product was long and fraught with setbacks, with several moments where they nearly gave up. Yet their unwavering belief that “such customized saddles must be achievable” fueled the team’s perseverance. Today, every Joyseat delivered to customers is even engraved with the rider’s name.

To ensure precise adaptation, Posedla meticulously considers each user’s sit bone width, body flexibility, physique data, and riding style. This rigorous approach has made Posedla the first brand in the industry to achieve truly bespoke production—where every saddle, from design to manufacturing, is exclusively crafted for one specific rider.

To accurately capture sit bone data for optimal comfort, the brand sends users a 3D hip measurement kit called the “Smiling Butt Kit.” The team combines this data with personal details such as BMI, flexibility, and gender to fine-tune the saddle’s dimensions and shape. Additionally, factors like riding duration, cumulative mileage, and cycling style are considered to create a saddle with precisely tailored stiffness and support.

Unlike generic designs, the Joyseat is produced using industrial-grade 3D printing via MJF (MultiJet Fusion) technology. The upper part features a specialized lattice structure made of thermoplastic polyurethane (TPU), allowing different zones (such as the nose, sit bone contact area, and sides) to provide targeted flexibility or firmness as needed. Beneath this lattice, the saddle’s rails and base are crafted from carbon fiber, ensuring strength while minimizing weight.

Comparison with Traditional Brands: 3D Printing as the Future Trend
To understand Posedla’s breakthrough, it’s helpful to compare it with established traditional brands in the saddle market:

Fizik: Long a household name among professional cyclists, Fizik offers saddles like the Arione and Antares series designed to fit various body types. Recently, Fizik introduced the Adaptive series, incorporating 3D-printed zones to enhance comfort. However, this series remains mass-produced and lacks full customization capabilities.

Fizik brand seat

Specialized: The brand has launched its Power saddle series, featuring "Body Geometry" technology. Compared to traditional saddles, these are shorter and wider, effectively reducing pressure on soft tissues—a design validated by medical research. The Power series has become one of the most popular saddles worldwide, though its customization remains limited to "selecting preset widths."

Specialized Power Series saddle

● Trek: The Aeolus saddle series is specifically designed for cyclists who "pursue aerodynamic efficiency," featuring a short-nose shape and extensive hollowed-out design. It is particularly suitable for triathletes and road racers, as these riders often maintain a "low wind-resistance posture" during cycling. However, the series demonstrates slightly limited versatility in gravel riding or long-distance endurance cycling scenarios.

Bontrager Aeolus Pro Bicycle Saddle

● Selle SMP: Selle SMP is perhaps the most distinctively designed saddle brand, featuring an exaggerated "downward-sloping nose" and a wide central cutout. This seemingly unconventional design has earned high praise from cyclists suffering from "severe soft tissue pressure" or "nerve compression"—for some, Selle SMP saddles are nothing short of a "lifesaver." However, for others, such extreme designs may cause discomfort.

Selle SMP Saddle

All these mainstream brands utilize Carbon DLS (Digital Light Processing) technology for production, with Posedla being the only exception that employs MJF (Multi Jet Fusion) technology. In terms of weight, Posedla's Joyseat ULTRA stands out with a remarkable weight of approximately 155 grams, enabling it to compete directly with the lightest saddle products on the market.