Sillín ISM PN 3.1

The ISM PN 3.1 Saddle is built for triathletes and time trial riders who need comfort and support during long hours in an aggressive aero position. Part of ISM’s Performance Narrow series, it features a 120 mm width and the signature split-nose design that eliminates pressure on soft tissue for improved blood flow and reduced numbness.

Compared to the firmer PN 3.0, the PN 3.1 uses softer 40-series foam and gel padding, making it the go-to option for athletes who prioritize comfort without giving up aerodynamic efficiency. Its narrow shape allows for maximum thigh clearance, ensuring unrestricted pedaling in even the most tucked positions.

Specs at a Glance

• Category: Performance Narrow (PN) series
• Width: 120 mm
• Length: 255 mm
• Rails: Stainless steel or optional carbon
• Padding: 40-series foam and gel
• Intended Use: Triathlon, time trial, and aggressive aero riding

Design Benefits

1. Pressure relief: Split-nose design reduces soft tissue pressure for improved comfort and circulation.
2. Thigh clearance: Narrow profile allows full pedal rotation without inner leg interference.
3. Endurance comfort: Softer padding compared to the PN 3.0 keeps riders comfortable on longer sessions.
4. Aero focus: Ideal for maintaining power and comfort in aggressive aerodynamic positions.

Final Take

The ISM PN 3.1 Saddle offers triathletes and time trialists a balance of comfort and aerodynamic efficiency. With a narrower design and extra padding, it’s the perfect choice for long-distance racing and training where every watt and every detail counts.