Performance-focused. Rider-friendly. Built for comfort in an aggressive riding position.

The ISM PN 4.1 combines the streamlined shape of ISM's Performance Narrow series with additional padding for riders who prefer a slightly softer ride.

Built on ISM's PN4 chassis, the PN 4.1 features 125 mm sit-bone contact points to accommodate a wider range of riders while maintaining excellent thigh and hamstring clearance. Its narrow profile gives you room to move naturally on the bike — whether you're riding road, gravel, triathlon or time trial.

Like all ISM saddles, the PN 4.1 uses ISM's distinctive noseless design to reduce pressure on sensitive soft tissue and help eliminate numbness. The result is a saddle designed to support both comfort and performance, particularly when riding in a lower or more aerodynamic position.

Why we like it

The PN 4.1 is a versatile performance saddle with a little more cushioning than the PN 4.0. The 125 mm width makes it suitable for a broader range of riders without giving up the clearance and freedom of movement that make the Performance Narrow saddles particularly well suited to road and triathlon positions.

Not sure which saddle is right for you? Saddle choice and setup are an important part of bike fit. We can help you find a saddle that works with your position, your bike and the way you ride.

Key Features

• 125 mm width to accommodate a greater range of sit-bone widths
• Increased padding for a slightly softer ride
• Tapered-edge design for comfort and freedom of movement
• Excellent thigh and hamstring clearance
• Auto-racing-inspired air-vent chassis
• ISM noseless design to reduce soft-tissue pressure
• ATMOS molding manufacturing process

Commonly Used For

• Road bikes
• Gravel bikes
• Triathlon bikes
• Time trial bikes

Tech Specs

Category: Performance Narrow
Length: 255 mm
Width: 125 mm
Padding: 40-Series Foam
Rails: Chromoly
Colour: Black