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Cycling navigate_next Indoor training navigate_next Accessories navigate_next The Robert Axle Project rear axle Focus RAT for trainer BOOST
The Robert Axle Project

The Robert Axle Project rear axle Focus RAT for trainer BOOST

79.99 €
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From 30.10.2026 (Friday) Check availability
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By courier to your home Delivery by courier DPD Delivery by courier GLS
Delivery method on Monday 02.11.2026
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At pick-up points GLS / Alzabox pick-up point DPD pick-up point Packeta pick-up point
Delivery method on Monday 02.11.2026
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Extended return option up to 100 days More info
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Extended additional warranty +1 year More info

This 12mm thru-axle for trainers will adapt your road, gravel, touring, or mountain bike equipped with a 12mm axle to a modern bike trainer. You no longer need a second bike for indoor training or pre-race warm-ups. With this thru-axle specifically for trainers, you can now train in the comfort of your home and warm up before races on your race bike. Your bike is always ready to ride, indoors or out, with or without a trainer.



  • Serves as a 12mm diameter rear thru-axle, primarily for clamping into a trainer.
  • Designed for the FOCUS RAT 148 mm (BOOST) system.

  • Suitable for use with or without a trainer, indoors or out.

  • No special tools are required. Easy installation using a standard 5mm Allen key.

  • Designed, manufactured, and tested in the USA. Proven worldwide.



    Model: For trainer

    Axle Type: Rear

    Axle Diameter: 12 mm

    • Product details
    product ID 174631
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    The Robert Axle Project
    Accessories The Robert Axle Project
    Like many great things in life, the Robert Axle Project was born out of a passion for adventure and a desire for change. Robert Axle Project is a brand that specializes in bike wheel mounting axles. The brand is known for manufacturing high quality replacement axles and related components for bicycles. Their products are designed to provide solutions to the various needs of cyclists including cargo transport, cart hauling, and bikepacking needs.
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