Specialized Sitero Triathlon TT Saddle 155mm Black SWAT Cr-Mo Rails

Specialized Sitero Saddle

155mm | Black | Triathlon & Time Trial | SWAT™ Compatible

The Specialized Sitero Saddle is purpose-built for triathlon and time trial riders who spend hours in aggressive aerodynamic positions. Developed with input from Retül fit specialists, physicians, and Specialized engineers, the Sitero features a progressive shape, wide pressure-relief channel, and Level 2 padding to maximize comfort while maintaining stable pelvic support in the aero tuck.

Finished with durable hollow chromoly rails, a flexible 4-way stretch cover, and integrated SWAT™ compatibility, the Sitero is engineered for long-distance performance without compromising comfort.

Designed for Triathlon & Time Trial

The Sitero is specifically shaped for sustained riding in aerodynamic positions.

Benefits include:

• Stable pelvic support
• Optimized for aero tuck positioning
• Reduced soft tissue pressure
• Improved comfort over long distances
• Efficient power delivery while remaining in position

Designed for riders who spend extended periods on aerobars.

Pressure-Relief Body Geometry Shape

The progressive profile and wide center channel help minimize pressure where it matters most.

Features include:

• Wide pressure-relief channel
• Progressive saddle profile
• Stable seating platform
• Improved pelvic support
• Enhanced comfort during long rides

Ideal for triathlon and TT fit positions.

Level 2 Padding

Specialized's Level 2 padding offers an excellent balance between comfort and road feel.

Advantages include:

• Medium-density padding
• Long-distance comfort
• Lightweight PU foam
• Efficient pedaling support
• Reduced rider fatigue

Comfort without sacrificing performance.

Hollow Chromoly Rails

Durable hollow Cr-Mo rails provide dependable strength and vibration damping.

Benefits include:

• Lightweight construction
• High durability
• Excellent strength
• Compatible with standard saddle clamps
• Long service life

Built for demanding training and racing.

SWAT™ Compatible

Integrated SWAT™ mounting points allow clean installation of compatible Specialized storage accessories.

Benefits include:

• Integrated accessory mounting
• Aerodynamic storage solution
• Clean appearance
• Compatible with SWAT™ accessories

Carry ride essentials without cluttering your bike.

Specifications

• Brand: Specialized
• Model: Sitero
• MPN: 27121-1005
• Color: Black
• Width: 155mm
• Weight: 245g
• Rail Material: Hollow Chromoly (Cr-Mo)
• Padding Level: Level 2 (Medium Density)
• Cover: 4-Way Stretch
• SWAT™ Compatible: Yes

Compatibility

Compatible with:

• Triathlon bikes
• Time Trial (TT) bikes
• Standard saddle rail seatpost clamps
• Specialized SWAT™ storage accessories

In the Box

• Specialized Sitero Saddle – Black – 155mm

Key Features

✔ Genuine Specialized Sitero saddle

✔ Designed specifically for triathlon and TT riding

✔ Wide pressure-relief channel

✔ Progressive aero saddle shape

✔ Level 2 medium-density padding

✔ Hollow chromoly rails

✔ 4-way stretch cover

✔ SWAT™ compatible mounting system

Ideal For

✔ Triathlon racing

✔ Time trial competition

✔ Ironman events

✔ Long-course endurance racing

✔ Aero road bike setups

✔ Performance training

Why Choose the Specialized Sitero Saddle?

• Specifically engineered for aggressive triathlon and time trial riding positions
• Developed with input from Retül fit specialists, physicians, and Specialized engineers
• Wide pressure-relief channel improves comfort and reduces soft tissue pressure during long efforts
• Level 2 padding balances support, comfort, and efficient power transfer
• Hollow chromoly rails provide durable, lightweight performance
• Integrated SWAT™ mounts allow clean, aerodynamic storage of compatible accessories

The Specialized Sitero Saddle 155mm is purpose-built for triathletes and time trial riders seeking maximum comfort and stability in the aero position. Featuring a pressure-relief channel, Level 2 padding, hollow chromoly rails, and SWAT™ compatibility, it delivers the support needed for long-distance performance while maintaining an efficient aerodynamic riding position.

Specifications Summary