Description
Shimano SH-RC903 S-PHYRE Road Cycling Shoes
The Shimano SH-RC903 S-PHYRE is a competition-focused road cycling shoe engineered to deliver a precise fit, premium comfort, exceptional stability, and highly efficient power transfer.
Designed for demanding training and racing, the RC903 combines a lightweight and breathable upper with dual BOA® Li2 dials, an adjustable Powerzone wire guide, and Shimano’s stiffest sole rating.
Product Specifications
- Discipline: Road cycling
- Closure system: Two BOA® Li2 dials
- Upper material: Lightweight and breathable microfibre leather
- Stiffness index: 12/12
- Weight: Approximately 450 g per pair in size 42
- Cleat compatibility: SPD-SL, three-bolt road cleats
- Recommended pedals: Shimano PD-R9100
Key Features
- Competition-oriented S-PHYRE road cycling shoe
- Lightweight and breathable microfibre leather upper
- Premium heel counter with anti-twist protection
- Slim, low-profile cross-lacing system
- Two low-profile BOA® Li2 adjustment dials
- Quick and precise fit adjustment
- Adjustable Powerzone wire guide
- Secure and supportive forefoot retention
- Integrated seamless midsole and upper construction
- Maximum 12/12 sole stiffness rating
- Shimano Dynalast technology
- SPD-SL three-bolt cleat compatibility
Precision Fit and Stability
The lightweight and breathable microfibre leather upper adapts closely to the foot, providing a secure fit and premium comfort throughout the ride.
A premium heel counter with anti-twist protection helps maintain optimal foot positioning during hard accelerations, powerful sprinting, and high-cadence efforts.
The slim, low-profile cross-lacing system evenly secures the forefoot, while the two BOA® Li2 dials allow quick, precise, and independent fit adjustment.
An adjustable Powerzone wire guide provides reliable forefoot support, helping reduce unwanted foot movement during demanding efforts.
The integrated seamless upper and midsole construction delivers an exceptional combination of fit, stability, and low weight.
Technology Overview
SPD-SL
Shimano’s SPD-SL road pedal system creates a stable and efficient connection between the shoe and pedal. Its wide cleat platform supports effective power transfer under high pedalling loads while providing improved stability.
Shimano Dynalast
Shimano Dynalast features an optimised shoe-last profile and toe-spring area designed to promote a smoother and more energy-efficient pedalling motion.
A toe-spring position that is too high may increase tension in the plantar, calf, and hamstring muscles, while one that is too low can contribute to a flexed and inefficient pedalling action.
Developed through extensive research and feedback from professional riders, Shimano Dynalast helps reduce energy loss during the recovery phase of the pedal stroke, supporting greater efficiency and reduced fatigue on long and demanding rides.
Find Your Perfect Shoe Size
To choose the correct size for your cycling shoes, measure the length of your foot in centimetres and compare it with the corresponding EU and US sizes in the chart below.
- Place a sheet of paper on a hard, flat surface next to a wall.
- Stand on the paper with your heel lightly touching the wall. Wear the type of socks you normally use while cycling.
- Mark the end of your longest toe and measure the distance from the wall to the mark in centimetres.
- Measure both feet and use the measurement of the longer foot.
- Compare your foot length with the appropriate men’s or women’s footwear section in the size chart.
- If your measurement falls between two sizes, choose the larger size to allow enough space and improve comfort while riding.
Footwear Size Chart
Please note: The size chart is provided as a general reference. Fit may vary depending on foot shape, width and personal preference.
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About Us
Cyclist's Closet is a virtual cycling store based in Lisbon, Portugal. We provide high-quality cycling gear at competitive prices, helping riders achieve the best performance on every ride.
FROM CYCLISTS TO CYCLISTS — COMMITTED TO QUALITY AND PERFORMANCE
We are an authorized reseller of leading cycling brands such as Sidi, Castelli, Selle Italia, Prologo, Fizik, MET, and many more. All our products are sourced directly from official distributors in Europe, ensuring authenticity, competitive pricing, and trusted service.
Shipping & Handling
🚚 Free Shipping available on most shoes and helmets. For clothing, free shipping applies when purchasing two or more items.
Delivery time depends on the destination country and carrier.
Customs Duties: Depending on your country, your order may be subject to import duties or taxes. These charges are the buyer’s responsibility.
Returns
If you are not satisfied with your purchase, you can return the item within 30 days. Returned items must be:
- In the same condition as received
- With original tags attached
- In the original box/packaging
- Without signs of use or damage (including mishandling during return shipping)
Buyer is responsible for return shipping costs, unless the item is faulty or incorrect.
Contact
If you have any questions, please do not hesitate to contact us. We are available 7 days a week to assist you.