Robert Axle Project

Browse our full range of Robert Axle Project thru-axles, axle plugs, spacer kits, and hangers — precision-engineered axle solutions for road, gravel, MTB, and bikepacking builds. Robert Axle Project specialises in the components that keep your wheels firmly and correctly seated, whatever the terrain or application.Why Choose Robert Axle Project?Robert...

Browse our full range of Robert Axle Project thru-axles, axle plugs, spacer kits, and hangers — precision-engineered axle solutions for road, gravel, MTB, and bikepacking builds. Robert Axle Project specialises in the components that keep your wheels firmly and correctly seated, whatever the terrain or application.

Why Choose Robert Axle Project?

Robert Axle Project was founded to solve a specific problem: the lack of quality, compatible thru-axle options for cyclists using trainers, cargo bikes, and specialist builds. Their range has since expanded to cover a comprehensive selection of axles, spacers, plugs, and hangers engineered to exact tolerances for reliable, rattle-free performance.

What's in This Collection

This collection includes Robert Axle Project thru-axles, UDH hangers, axle spacer kits, and axle plugs. Whether you're setting up a smart trainer, replacing a damaged hanger, or sourcing a specific axle for a custom build, you'll find the right part here.

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  • Robert Axle Project Kid Trailer AdaptersRobert Axle Project Kid Trailer Adapters

    Robert Axle Project Kid Trailer Adapters

    Adaptors for Kid Trailers and Cargo Trailers
    from £35.00
    from £35.00
  • Robert Axle Project BOB Trailer Axle Hardware Kit

    Robert Axle Project BOB Trailer Axle Hardware Kit

    This Trailer Hardware Kit BIN002 is used to attach single-wheel cargo trailers such as the Bakcou and QuietKat trailers based on the BOB trailer design
    £10.00
    £10.00
  • Robert Axle Project Axle Nuts for BOB Trailers

    Robert Axle Project Axle Nuts for BOB Trailers

    Our Threaded Axle Nuts for BOB Trailers are the perfect solution for attaching a BOB Trailer to a threaded axle. Whether it's a bolt on hub, or an ebike hub motor we have it covered.These adapters are robust stainless steel with enough surface area...
    £40.00
    £40.00
  • Robert Axle Project BOB Trailer Bobbins

      Robert Axle Project BOB Trailer Bobbins

      These BOB trailer bobbins are made by the Robert Axle Project to make our axles compatible with the BOB Trailer. Slide them on your axle ends to complete your Robert Axle thru axle for BOB Trailer.Includes mounting hardware for attachment to axle.
      £30.00
      £30.00
    • Robert Axle Project Lightning Bolt-on Thru Axle - Naild - RearRobert Axle Project Lightning Bolt-on Thru Axle - Naild - Rear

      Robert Axle Project Lightning Bolt-on Thru Axle - Naild - Rear

      Replace your stock Naild axle with a simpler, easier to use and more durable bolt-on axle. Our Naild replacement axles are a great alternative for your Naild equipped Marin, Polygon or Argon 18 bikes.
      £68.00
      £68.00
    • Robert Axle Project Lightning Bolt-on Thru Axle - Mavic - Rear

      Robert Axle Project Lightning Bolt-on Thru Axle - Mavic - Rear

      Our Lightning Bolt-On thru axles offer the highest quality, simple, lightweight alternative to that bulky handle.This axle is specifically designed to only replace front Mavic Speed Release thru axles. The thread, a 'double lead-in' thread, is proprietary to the Mavic Speed Release system only.
      £58.00
      £58.00
    • Robert Axle Project Lightning Bolt-on Thru Axle - Focus R.A.T. - Rear

      Robert Axle Project Lightning Bolt-on Thru Axle - Focus R.A.T. - Rear

      As long-time cyclists, we are not fans of having our parts sticking out. Our Lightning Bolt-On replacement thru-axles offer a lower profile design without sacrificing strength and durability. Our axles are carefully machined to the highest standards in the industry, for the best fit....
      £68.00
      £68.00
    • Robert Axle Project Lightning Bolt-on Thru Axle - Cervelo R.A.T. - Rear

      Robert Axle Project Lightning Bolt-on Thru Axle - Cervelo R.A.T. - Rear

      As long-time cyclists, we are not fans of having our parts sticking out. Our Lightning Bolt-On replacement thru-axles offer a lower profile design without sacrificing strength and durability. Our axles are carefully machined to the highest standards in the industry, for the best fit....
      £78.00
      £78.00
    • Robert Axle Project Lightning Bolt-on Thru Axle - Naild - Front

      Robert Axle Project Lightning Bolt-on Thru Axle - Naild - Front

      Replace your stock Naild axle with a simpler, easier to use and more durable bolt-on axle. Our Naild replacement axles are a great alternative for your Naild equipped Marin, Polygon or Argon 18 bikes.
      £65.00
      £65.00
    • Robert Axle Project Lightning Bolt-on Thru Axle - Mavic - Front

      Robert Axle Project Lightning Bolt-on Thru Axle - Mavic - Front

      Our Lightning Bolt-On thru axles offer the highest quality, simple, lightweight alternative to that bulky handle.This axle is specifically designed to only replace front Mavic Speed Release thru axles. The thread, a 'double lead-in' thread, is proprietary to the Mavic Speed Release system only.
      £55.00
      £55.00
    • Robert Axle Project Lightning Bolt-on Thru Axle - Focus R.A.T. - Front Robert Axle Project Lightning Bolt-on Thru Axle - Focus R.A.T. - Front

      Robert Axle Project Lightning Bolt-on Thru Axle - Focus R.A.T. - Front

      As long-time cyclists, we are not fans of having our parts sticking out. Our Lightning Bolt-On replacement thru-axles offer a lower profile design without sacrificing strength and durability. Our axles are carefully machined to the highest standards in the industry, for the best fit....
      £65.00
      £65.00
    • Robert Axle Project Lightning Bolt-on Thru Axle - Cervelo R.A.T. - Front

      Robert Axle Project Lightning Bolt-on Thru Axle - Cervelo R.A.T. - Front

      As long-time cyclists, we are not fans of having our parts sticking out. Our Lightning Bolt-On replacement thru-axles offer a lower profile design without sacrificing strength and durability. Our axles are carefully machined to the highest standards in the industry, for the best fit....
      £65.00
      £65.00
    • Robert Axle Project Axle Plug

      Robert Axle Project Axle Plug

      Axle Plug is a stealthy tyre plug tool that fits securely into the end of Robert Axle Project 15mm axles, ready for a quick intervention the next time you get a puncture.The plug is preloaded with a bacon strip or even multiple strips in...
      £34.00
      £34.00
    • Robert Axle Project RAP036 - Axle Spacer Kit

      Robert Axle Project RAP036 - Axle Spacer Kit

      For 12mm Thru axles.Kit includes:1 x 3mm and 2 x 6mm Flat washers, 1 x 6mm taper washer
      £7.99
      £7.99
    • Robert Axle Project UDH Hanger

      Robert Axle Project UDH Hanger

      The Universal Derailleur Hanger, designed by SRAM, simplifies the never-ending array of derailleur hangers that were all just subtly different into a single unified design, making it easier for you and bike shops to always have a spare available.Our U.D.H. makes it even better...
      £45.00
      £45.00
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    About Robert Axle Project

    Robert Axle Project was created to address the growing complexity of thru-axle standards across modern bicycle frames and forks. With so many thread pitches, diameters, and lengths in circulation, finding the correct axle for a specific frame or trainer setup can be challenging. Robert Axle Project simplifies this with a comprehensive, well-documented range of axles and accessories engineered to precise tolerances. At Swinnerton Cycles, we stock their range for riders and builders who need the right axle, first time.

    Thru-Axle Specialists

    Robert Axle Project offers one of the most comprehensive thru-axle ranges available, covering front and rear axles across a wide variety of thread standards, diameters, and lengths. Their axles are machined to tight tolerances and designed for easy installation, ensuring a secure, play-free fit in compatible frames and forks.

    Trainer Axles, Hangers & Accessories

    Beyond standard replacement axles, Robert Axle Project produces specialist trainer axles for use with direct-drive and wheel-on smart trainers, as well as UDH-compatible hangers, axle spacer kits for cargo and longtail builds, and protective axle plugs to keep threads clean during storage and transport.

    Finding the Right Axle

    To identify the correct axle, you'll need to know your frame or fork's axle diameter (typically 12mm or 15mm), thread pitch, and axle length. These details are usually found in your frame's specification sheet or stamped on the existing axle. If you're unsure, the Swinnerton Cycles team can help you identify the correct part for your specific frame or trainer.

    Why Swinnerton Bikes

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