2026 Specialized Sitero
2026 Specialized Sitero
2026 Specialized Sitero
2026 Specialized Sitero
2026 Specialized Sitero
2026 Specialized Sitero
2026 Specialized Sitero
2026 Specialized Sitero
Specialized

2026 Specialized Sitero

$170.00
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Sitero
Sitero
Triathlon / Time Trial · Aero Position · Hollow Cr-Mo Rails

Designed with Retül fit specialists, doctors, and engineers — the Sitero is the best-fitting saddle for aerodynamic time trial positions. Built for the extreme geometry of triathlon and time trial bikes, it delivers optimal comfort and support for long distance rides in an aerodynamic position. Hollow Cr-Mo rails and SWAT mounts keep weight down while enabling integrated storage.

  • Aero Position Optimized: Designed from the ground up for TT/triathlon geometry — where saddle position is extreme.
  • Wide Channel + Progressive Shape: Multiple width options with a progressive shape that supports the pelvis in aero position.
  • Level 2 Padding: Medium density foam — bike feel with enough cushioning for long efforts in an aggressive position.
  • 4-Way Stretch Cover: Unparalleled pelvic rami comfort — reduces pressure on the bones that bear your weight in the aero position.
  • Hollow Cr-Mo Rails: Durable, lightweight steel — standard compatibility, reliable on TT bikes.
  • SWAT Compatible: Aerodynamic integrated storage mounts — keep ride essentials tucked and out of the wind.

The Sitero is not a Body Geometry saddle — it's a purpose-built TT/triathlon saddle designed for the specific demands of aerodynamic positioning. If you spend hours in the aerobars, this is the saddle built for that position.

Not Body Geometry — Purpose-Built for Aero
The Sitero is not a Body Geometry saddle — it's a triathlon/time trial specific design. Body Geometry saddles are built for upright and aggressive road positions. The Sitero is built for the extreme saddle positions that TT and triathlon bikes require — where the saddle is pushed far forward and the rider is in a deeply aggressive aero tuck. The shape, padding, and rails are all tuned for this specific use case.
Pelvic Rami Comfort — 4-Way Stretch Cover
In the aero position, your weight rests on the pelvic rami (the bones at the base of your pelvis) more than in a traditional road position. The Sitero's 4-way stretch cover material is specifically designed to reduce pressure on these bones — something standard road saddles don't address. This is the key comfort innovation for triathletes spending long hours in the aero position.
Hollow Cr-Mo Rails — Standard Compatibility
Unlike the S-Works saddles with their oversized carbon rails, the Sitero uses standard hollow chromium-molybdenum steel rails. This means full compatibility with any standard seat post — no special clamps needed. Steel is also more durable than carbon for the kind of abuse a TT bike might see in transport.
General
Model
Sitero
Use
Triathlon, Time Trial — aerodynamic positions
Position
Triathlon / Time Trial — forward aero position
Design Partners
Retül fit specialists, doctors, engineers
Padding & Cover
Level
Level 2 — medium density foam, bike feel + cushioning
Padding
Lightweight, supportive PU padding for longer rides
Cover
4-way stretch — unparalleled pelvic rami comfort in aero position
Construction
Rails
Hollow chromium-molybdenum steel (Cr-Mo) — standard compatibility, durable
Shape
Progressive — wide channel, multiple widths for optimal fit
SWAT Compatible
Yes — aerodynamic integrated storage mounts
Available Widths
130mm / 155mm
Weight
130mm
227g
155mm
245g

Shipping Policy

Components:

All component items (wheels, drivetrains, suspension, brakes, etc.) ship within 1–4 business days of purchase.

Bicycles:

Complete bikes typically ship within 2–3 weeks due to build, tuning, and inspection times. You will receive tracking information as soon as your order is ready to ship.

Riding Gear & Apparel:

Riding gear and apparel orders (helmets, jerseys, gloves, etc.) ship within 1–3 business days.

Returns & Exchanges:

If you received the wrong size or wish to exchange an item, it must be returned in original condition—unused, uninstalled, and with all packaging intact.

For full details, please see our Refund Policy before initiating a return.

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Sitero
Technology
🎯
Aerodynamic Fit
Designed with Retül fit specialists, doctors, and engineers for the best-fitting saddle in TT positions.
🦴
Wide Channel Design
Wide channel and progressive shape provide optimal comfort for long distance rides in aero position.
🧽
Level 2 Padding
Medium density foam for bike feel with additional cushioning — support without sacrificing connection.
🔄
4-Way Stretch Cover
4-way stretch cover material for unparalleled pelvic rami comfort in any position.
⚡
Hollow Cr-Mo Rails
Lightweight and supportive hollow Chromoly rails for durability without the weight.
🎒
SWAT™ Compatible
Integrated storage mounts for sleek, aerodynamic storage of ride essentials.
Built For
Time Trial
Triathlon
Aero Position
Long Distance
Quick Specs
227g
Weight
Size 130mm
Level 2
Padding
Medium Density
Cr-Mo
Rails
Hollow
130/155
Widths
mm

Prepared with intention.

Every product is carefully inspected and handled by our team before it ships. From fit and function to final details, we make sure each piece is ready for the outdoors ahead—so you can focus on the experience, not the gear.

Passion drives us

At SpokeX Bike Co., bikes aren't just our business — they’re our way of life. As a rider-owned and operated shop, every decision we make comes from firsthand experience on the trail, at the race, and on the open road. We know what it’s like to chase a new line, push through the pain cave, and celebrate the ride — because we live it every day.

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