• Shimano Tiagra 4503 Triple 9sp Front Mech

      • Currently Unavailable
      • We’re very sorry but we don’t know when this item will be back in stock.

Reliable front derailleur for road bikes. Extra wide pivot link increases rigidity while reducing flex for improved shifting response. Aluminium links to save weight and improve rigidity. For cycles equipped with Mega9 drive trains. Chrome-plated steel chain cage Maximum capacity of 20 teeth.


  • Improved surface treatment.
  • Wide link design.
  • 9-speed.
  • Multi clamp: 28.6, 31.8mm (28.6mm : 31.8 w/ adapter)


  • Rear Speeds: 9-speed
  • DUAL SIS: Yes
  • Top Gear Teeth: 52T
  • Capacity: 20T
  • Spring Cover: Yes
  • Chain Stay Angle: 63-66 deg.
  • Mounting: band/brazed-on
  • Applicable Chainline: 45mm
  • Compatible Adapter: SM-AD11(31.8mm) FOR USE WITH BRAZE-ON DERAILLEUR ONLY
  • Band Diameter: 28.6/31.8mm
  • Band/Brazed-On Clamp: aluminium/barrel
  • Outer Link: aluminium/barrel
  • Inner Link: zinc/pearl plated
  • Chain Guide: steel/chrome plated
  • Average Weight: 113g (Braze on)
  • Bottom Pull

A 2 year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).

  • Delivery costFREE
  • Delivery toUSA
  • 365 Days return or exchange

    If you're not completely satisfied with an item you may return it within 12 months of purchase. We'll give you a full refund if the item hasn't been used or the component hasn’t been fitted.

    More information on returns
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Buying Guide

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