The Shimano Tiagra FC-4703 is the reference triple crankset for demanding cyclists seeking a versatile 3x10-speed transmission. With its 50/39/30 teeth configuration, this crankset offers a complete range of gear ratios, ideal for tackling all gradients, from alpine passes to rolling terrain, while maintaining an optimal balance between stiffness and lightness. Manufactured in anodized aluminum with an elegant grey/black finish, the FC-4703 incorporates Shimano's proven technologies from high-end groupsets.

Hollowtech II Technical Architecture

The FC-4703 adopts Hollowtech II technology with an integrated 24 mm axle fused to the right crank arm. This 2-piece architecture significantly increases overall stiffness while reducing total weight, thus optimizing pedaling power transmission. The wider bearing positioning improves system stability and longevity. The Hollowtech II interface ensures simplified installation and reduced maintenance, with extended compatibility to BB-RS500, BB-RS501 bottom brackets and higher ranges (SM-BB9000, BB-R9100).

Asymmetric 4-Arm System

• 110/74 mm asymmetric spider: Inherited from Dura-Ace, Ultegra and 105 11-speed groups, this optimized BCD improves the stiffness-to-weight ratio and allows smooth and precise chainring changes.
• Multi-material chainrings: Large and medium aluminum chainrings combined with the 30T steel and GFRP (fiberglass) composite small chainring ensure durability and performance under high load.
• HG-X optimization: The specific tooth profile for HG-X 10-speed chains (type CN-HG54) guarantees crisp gear changes even under hard pedaling, with a 0.6% superior pedaling efficiency.

Geometry and Standards

• Chainline: 45 mm, suited to modern frames and ensuring optimal alignment with 10-speed cassettes.
• Q-Factor: 158.8 mm for natural leg positioning and maximum pedaling comfort.
• Pedal threading: Standard 9/16" compatible with all road and trekking pedals.

Available Variants

The Shimano Tiagra FC-4703 crankset is offered in four crank arm lengths to suit all body types and pedaling styles:

• 165 mm: For smaller riders or cyclists seeking high cadence
• 170 mm: Versatile length suited to most cyclists
• 172.5 mm: Ideal compromise between power and velocity
• 175 mm (EAN 4524667927020): For larger riders favoring force and torque

Technical Highlights

• 2-piece Hollowtech II construction: Increased stiffness, reduced weight, simplified installation
• 50/39/30 triple chainring: Extended gear ratio range for climbing, group riding or sprinting
• Tiagra 4700/4703 compatibility: Specifically designed to work with Tiagra triple derailleurs and shifters (dedicated cable pull)
• Anodized finish: Corrosion resistance and refined aesthetics
• Controlled weight: Approximately 1015 grams depending on length, remarkable for a triple

Applications and Compatibility

The FC-4703 is intended for road bikes, touring bikes, sportive bikes and city bikes equipped with a 10-speed transmission. It integrates perfectly into a complete Tiagra 4700 groupset but can also be combined with other Shimano 10-speed components (note the specific cable pull for triple). The crankset requires a Hollowtech II bottom bracket not included (recommendation: BB-RS500 for 68 mm BSA threaded bottom bracket). The 4-arm spider design and 45 mm chainline ensure optimal compatibility with modern frames and 3x10 transmissions.