What it is
The PRO Sirin Performance Saddle is a road cycling saddle designed specifically for female riders, developed by PRO (Shimano’s component brand).
It’s aimed at:
- Road racing
- Endurance riding
- Long-distance comfort with performance geometry
Key design idea
This saddle is built around female anatomical fit + pressure relief + racing efficiency.
Features explained in real terms
Women’s specific shape
- Designed based on female rider pressure mapping
- Typically includes:
- Wider rear support
- Reduced nose pressure
- Better sit-bone alignment
Result: less numbness and pressure on long rides
Bridgeless cut-out (center relief channel)
- Large central channel with no bridging material
- Purpose:
- Reduces perineal pressure
- Improves blood flow
- Reduces discomfort on long rides
Dual-density EVA foam
- Two foam firmness layers:
- Softer top layer for comfort
- Firmer base for support
Balance between comfort and pedaling efficiency
Slimmer nose (35mm wide)
- Narrow front section reduces:
- Thigh rubbing
- Pressure when riding in aero position
Base: carbon reinforced
- Not full carbon, but reinforced plastic/carbon mix
- Benefits:
- Stiff enough for power transfer
- More affordable than full carbon saddles
Rails: stainless steel (Inox)
- Strong, durable rails
- Heavier than titanium/carbon rails
- Very reliable for everyday use
PU cover
- Durable synthetic outer layer
- Resistant to:
Strengths
- Very good long-distance comfort (for road riding)
- Pressure-relieving cut-out design
- Stable performance position support
- Durable build (not fragile race-only saddle)
- Proper women-specific ergonomics
Limitations
- Not ultra-light (stainless steel rails)
- More expensive than basic saddles
- Still performance-oriented → not “soft cruiser” comfort
- Fit is very personal (saddles are highly individual)
Real-world verdict
This saddle is:
???? A performance-oriented women’s road saddle that prioritizes pressure relief and long-ride comfort without sacrificing racing efficiency.
It sits in the:
- Training / endurance / racing crossover category
Bottom line
The PRO Sirin Performance is:
- ✔ Designed for long road rides
- ✔ Focused on pressure relief + comfort
- ✔ Durable and performance-capable
- ❗ Not a plush casual saddle—it’s still a sport saddle
