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Product Details
Shimano RC903 S-PHYRE PWR Road Cycling Shoes
Made to excel in the heat of competition, intense training, and the lung-busting efforts of hanging with the local chop ride, the race-tuned Shimano RC903 S-PHYRE Road Cycling Shoes ensure you're the one doing the dropping of other riders when the watts spike.
Their closure system combines a BOA® Li2 metal dial, power boost guide, and secure toe strap to eliminate excess movement, ensuring every watt of power drives you forward. A breathable, stretch-resistant upper holds your foot firmly in place for optimal comfort and power transfer. Meanwhile, the heel cup with anti-twist stabilisation keeps you locked in during race-making accelerations and high-cadence interval efforts. This design means you can ride with confidence, focusing on your performance while leaving competitors behind to admire the shoes’ dazzling colour-shifting crystal finish on the outsole and heel.
Precision engineering
Every detail of the Shimano RC903 S-PHYRE PWR is precision-engineered for speed and comfort. The integrated seamless midsole and upper construction creates a lightweight, glove-like fit, while the low stack height midsole stabilises the foot and enhances efficiency. Rated with Shimano's highest stiffness score of 12/12 and weighing just 230g (size 42), these shoes push the limits of road cycling footwear. If you’re serious about unlocking your full racing potential, the RC903 S-PHYRE PWR isn’t just a purchase; it’s an investment in pure performance.
Pedal Compatibility
These cycling shoes are compatible with road pedal systems utilising the 3-bolt cleat system, such as Shimano SPD SL, Look Keo/Blade, Time Atac etc...
Sizing note:
Shimano shoes run small. If you usually wear a 44, order a 45 here. If you're between half sizes, always go up.
Features
- Race-tuned closure system with a BOA® Li2 metal dial, power boost guide, and toe strap reduces foot movement and enhances power transmission
- Race confidently while you let those behind you admire the dazzling colour-shifting crystal finish on the outsole and heel
- Breathable, stretch-resistant upper keeps feet stably in place to improve power transfer
- Heel cup with anti-twist stabilisation secures optimal foot positioning for intense acceleration and high tempo cadences
- Midsole-wrapping upper blends with the tongue to form a glove-like fit for remarkable pedalling stability
- Low stack height midsole stabilises the foot and optimises power transfer efficiency
- Integrated seamless midsole and upper construction set a new level of fit, stability and lightweight performance
- Stiffness rating: 12/12
- Manufacturer's claimed weight: 230g (size 42)
- Compatible with 3-bolt cleats and clipless road cycling pedal systems
- Cleats not supplied
Specifications
- Cleat Compatibility (Road)
- 3-bolt (Look/SPD-SL)
- Shoe Size System (Footwear)
- EU
- Closure Type
- boa
- Discipline Compatibility
- Road
- Fit Note
- runs-small
- Gender
- Unisex
- Intended Use (Footwear)
- Road Cycling
- Stiffness Index
- 12
- Weight (grams)
- 230 g
- Width / Fit
- regular-standard
- Breathability Rating
- High
- Materials (Detailed)
- upper-mesh
- Outsole Type
- TPU
- Thermal Insulation / Temperature Rating
- Not insulated
- Product code
- 1955651 / 54293669544282
Size Guide
| — | S | M | L | XL |
|---|---|---|---|---|
| Shoe Size | 37 - 39 | 40 - 42 | 43 - 45 | 46 - 48 |
| Foot Length (Cm) | 23.2 - 24.5 | 25.2 - 26.5 | 27.2 - 28.5 | 29.2 - 30.5 |
Reviews
5
Shipping & Returns
Free UK delivery on orders over £50. Orders are dispatched within 1-2 working days and typically arrive 1-2 working days later.
Return unused items in their original packaging within 30 days of delivery. Return postage is £3.50.
Q & A
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About Shimano
Shifting the way the world rides.
From a single Osaka workshop in 1921, Shimano has grown into the world's most influential component maker. The brand's relentless engineering — Dura-Ace, Ultegra, GRX, XTR — has shaped the way the world shifts, brakes and rides, on the road and off it.
Shimano's flagship groupset, Dura-Ace, has been the benchmark for top-level road components for more than five decades. Every refinement that lands on Dura-Ace eventually shapes the entire Shimano range, all the way down to entry-level drivetrains.
