This All Balls fork seal-only kit (Part No. 55-150) is designed for a range of Triumph motorcycle models, providing a reliable replacement for maintaining fork oil levels and reducing stiction. With an advanced seal profile that balances pressure across the seal lips, this kit reduces drag and extends seal life. Dyno-tested for durability, the seals are engineered to last three to four times longer than OEM parts.

Features

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  Seal profile designed to equalise pressure across seal lips for reduced drag and extended life

  
  


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  Ensures secure oil levels and minimises stiction

  
  


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  High-quality, original equipment-style replacement seals

  
  


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  Dyno-tested to last 3 to 4 times longer than OEM seals

  
  


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  Directional ribs for easy installation

  
  


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  Sold in pairs

  
  

Specifications

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  Dimensions: 43x55x9.5/10.5 and 43x55x11

  
  


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  Part number: 57-0021.AB

  
  

Cross-Reference OEM Part Numbers

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  All Balls 55-150

  
  

Vehicle Fitments

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  Triumph Adventurer 900 1996–1998

  
  


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  Triumph Thunderbird 900 1995–2003

  
  


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  Triumph Trident 900 1995–1998

  
  


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  Triumph Trophy 1200 1999–2003

  
  


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  Triumph Trophy 900 1996–2000