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Description
The Icon of Comfort & Performance
An icon reimagined for modern riders, the Sidi Genius X balances comfort and control for any riding style. Its high-grade microfiber upper is supple against the foot but structurally firm, delivering a secure, skin-friendly fit that holds under pressure. Dual NUUN dials and a High-Density Instep ensure precise adjustment, while the R3CC carbon composite sole and External Heel provide stable, efficient power transfer on every ride.
Designed for Every Foot
Millennium Fit is Sidi's latest innovation in cycling shoes. The new generation of Sidi shoes are designed with a slightly wider shape, offering enhanced comfort and better adaptability for more riders.
Features:
- 11 Generations of Riding Perfection - Born for unlimited comfort, Genius X is engineered for long-range performance on any ride and for any type of rider.
- Supportive by Design. Gentle by Feel - A superior-touch plush microfiber stabilizes the foot, maintains tension, and remains supple for all-day comfort.
- Custom Adapted Fit - Sidi's anatomical TPU instep closure enhances stability and comfort by securing the foot while reducing pressure points.
- Aero Tuned Dials - NUUN 001C is a compact, aero aluminum dial with SIDI's handle system for fast, precise tension and maximum hold.
- Stiffness That Stays Smooth - R3CC carbon composite sole with stiffness 6 balances efficient power transfer and long-lasting comfort across any ride.
Specs:
- Upper: Premium microfiber – supple feel with structured support for all-day comfort
- Closure: Dual NUUN 001C aluminum dials – aerodynamic, precise, and secure
- Instep: Anatomical TPU High-Density Instep – reduces pressure and enhances stability
- Fit System: External heel and reinforced design – maintains hold under pressure
- Outsole: R3CC carbon composite – stiffness index 6 for smooth power transfer and comfort
- Cleat Setup: 3-Bolt, independent cleat positioning for tailored alignment
- Replaceable Parts: Heel pads and dials
Free Exchanges: This product qualifies for free exchanges within the first 60 days after order. We'll cover the shipping both ways for continental US customers (not applicable for AK, HI, APO, FPO) if you need a different size and/or color of this product. Returned product must be in new condition with all labels and packaging. Free exchanges apply only for product in stock or available for backorder.
B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. Cleats may have been mounted leaving minor marks on the soles. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.
Size Chart

Specifications
Cleat Compatibility: 3 Hole (Road) | |
Width: Regular | |
White - 42 | Mfg PartNum: 000MCGENIUSXWHITE-42 |
White - 42.5 | Mfg PartNum: 000MCGENIUSXWHITE-42.5 |
White - 43 | Mfg PartNum: 000MCGENIUSXWHITE-43 |
White - 43.5 | Mfg PartNum: 000MCGENIUSXWHITE-43.5 |
White - 44 | Mfg PartNum: 000MCGENIUSXWHITE-44 |
White - 44.5 | Mfg PartNum: 000MCGENIUSXWHITE-44.5 |
White - 45 | Mfg PartNum: 000MCGENIUSXWHITE-45 |
White - 45.5 | Mfg PartNum: 000MCGENIUSXWHITE-45.5 |
White - 46 | Mfg PartNum: 000MCGENIUSXWHITE-46 |
White - 46.5 | Mfg PartNum: 000MCGENIUSXWHITE-46.5 |
White - 47 | Mfg PartNum: 000MCGENIUSXWHITE-47 |
White - 48 | Mfg PartNum: 000MCGENIUSXWHITE-48 |
Black - 42 | Mfg PartNum: 000MCGENIUSXBLACK-42 |
Black - 42.5 | Mfg PartNum: 000MCGENIUSXBLACK-42.5 |
Black - 43 | Mfg PartNum: 000MCGENIUSXBLACK-43 |
Black - 43.5 | Mfg PartNum: 000MCGENIUSXBLACK-43.5 |
Black - 44 | Mfg PartNum: 000MCGENIUSXBLACK-44 |
Black - 44.5 | Mfg PartNum: 000MCGENIUSXBLACK-44.5 |
Black - 45 | Mfg PartNum: 000MCGENIUSXBLACK-45 |
Black - 45.5 | Mfg PartNum: 000MCGENIUSXBLACK-45.5 |
Black - 46 | Mfg PartNum: 000MCGENIUSXBLACK-46 |
Black - 46.5 | Mfg PartNum: 000MCGENIUSXBLACK-46.5 |
Black - 47 | Mfg PartNum: 000MCGENIUSXBLACK-47 |
Black - 48 | Mfg PartNum: 000MCGENIUSXBLACK-48 |
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