Polytour Fire 125 - String Set

$20.01 USD
5 in stock


Brought to you by Tennis Lab

Impressive snapback and responsiveness from SIF technology* (Silicone Infused Filament)

This Yonex string is for players with medium-to-fast swing speeds looking for added power and spin.

*SIF technology is developed in cooperation with NANODAX

  • Gauge 16L (1.25mm)
  • Made in Japan
  • Round structure

Silicone Oil Infused Filament Technology


This new Silicone oil Infused Filament (SIF) technology - monofilament infused with silicone oil - allows big hitters to experience ultimate spin from intense snapback speeds. Greater snapback produces a powerful spin.

SIF Technology with unique pentagonal structure allows the string to move faster than conventional models, increasing spin. 

Equipment used by:

  • Elena Rybakina - Kazakhstan
  • Tatjana Maria - Germany
  • Eugenie Bouchard - Canada




    Set length: 12 m/39 ft


    Polyester (monofilament)

    Delivery & Returns



    Australian Orders

    FREE shipping on orders over $99 - Ace!

    Standard Australia Post $9.95 

    5-7 business days

    New Zealand Orders

    Standard flat rate shipping $12.50

    7-10 business days

    Rest of World

    Standard shipping $50*

    10-20 business days

    * Additional fee will apply for orders > 20kg

    We have a 30-day happiness guarantee return policy covering all change of mind returns, excluding final sale items.

    For more information on shipping & returns here

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