Lightning Bolt-on Axle – Front 12 mm for Cervelo R.A.T. Equipped Forks

(7 customer reviews)

$ 52.00

Our Lightning Bolt-On thru axles offer the highest quality, simple, lightweight alternative to that bulky handle. Available in a range of sizes that fit both front and rear wheels on all types of thru-axle equipped bikes.

This axle and fork insert are designed to replace the R.A.T thru axle found on many Cervelo forks.

SKU: LIG519.C Category:


  • This axle is designed to replace your front Cervelo R.A.T. axle and includes a threaded nut, which the axle threads into.
  • Lightning is Better. Our front and rear Lightning Bolt-On axles offer a stronger, more durable, lower profile and lighter weight option to replace your stock thru-axles.
  • Low Profile. No more bulky handles to strike trail obstacles or create wind drag. Aerodynamic design.
  • Light Weight. Our axles are internally bored to remove unnecessary material without compromising strength.
  • Easy to install. Our matching front and rear Lightning Bolt-On Axles only require a standard 6 mm hex wrench for easy installation and removal.
  • Better Tolerances. Manufactured in the USA to the tightest tolerances using aerospace materials and CNC manufacturing. No longer will your axle loosen while riding.

This is NOT an axle for attaching trailers or trainers.



  • The diameter of this axle is 12 mm and the true length of the axle shaft is  130 mm. Please note: Thru-axle lengths do not equal hub standards. An axle has to be longer than the hub to fit in the frame. A 12×100 hub does not equal a 100 mm long axle. This axle has been specifically designed to work with our fork insert and will not measure the same length as your stock RAT axle.
  • Weight: Axle = 30 grams Nut = 5 grams
  • The axle is precision CNC machined in the USA from 7075 aluminum and hard anodized for rugged durability. Our axles are built to the tightest standards in the industry.
  • No special tools required. Design allows for installation or wheel removal using your standard 6mm hex wrench.
  • Designed, built and quality tested in the USA. Proven around the world.
  • Learn about compatibility with Hexlox security systems.


Need more information about how our axles work?

7 reviews

  1. Lauris (verified owner)

    Amazing stuff. Saved 60grams from my R5 Disc stock RAT axles (front + rear) with these – nobody else really offers an alternative on the market. Top shelf product + the communication and shipping overseas was super quick as well. Highly recommended.

  2. Rob Green (verified owner)

    This kit is outstanding! Swapped out the R.A.T axles on both mine and my wife’s Cervelo S5’s and they are stiffer with this proper bolt thru. The aweful R.A.T axle system is over engineered and totally unnecessary, this kit puts the bike right and the way it should have been from the factory. Congratulations on such a well thought out and beautifully engineered upgrade. I received this, all the way from the USA, in 4 Days, those 4 days happened to be the Easter holiday weekend! Amazing fast delivery!!
    Many Thanks!

    • Katy Bryce

      Wow, we certainly do not guarantee 4 day delivery to the UK, but that is awesome! Thank you so much for your review, glad you liked the kit. For future UK customers, please keep in mind we have an excellent dealer with
      Cheers, Chris

  3. Tiago (verified owner)

    Top quality, soo much better than the R.A.T.
    Weight savings and easy installation.

  4. Mike Berdahl (verified owner)

    Perfect, easy installation. Great product

  5. Christoph (verified owner)

    Weight saving was the the idea. It worked out perfect, but still the RAT system does the release job much quicker..
    However I assume we all buy it for the esthetics and to save weight.

  6. Boris Vinitskyi (verified owner)

    exactly what I need! Fits perfectly to my bike cervelo s5 gen III

  7. William Simon (verified owner)

    The RAT axle on my 2018 Cervelo R3 was a bit sticky so I sought a solution. This bolt on axle fit the bill. Easy install and topnotch fit and finish. I also liked the looks of it better, so I decided to replace the rear RAT as well. Saved a little weight even after factoring in the hex key. Nice!!

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All orders from our website are via US Postal Service, from Oregon, U.S.A. We make every effort to ship your order within one business day.

Shipping rates and average delivery times are:

• United States: $7.50 USD, 3-4 business days

• Canada: $12.50 USD, 10-14 business days

• All other International: $12.50 USD, 12-16 business days

We are unable to offer expedited shipping. If you need expedited shipping of our products, please visit our Dealers & Distributors page for options. We cannot take responsibility for any delays during shipping, including delays in customs or incorrect shipping information.

Also Fits Your Bike

  • This is a thru axle so you can attach a child trailer to a Cervelo R.A.T. bike. Robert Axle Project Thru Axles for Kid Trailers are designed specifically to fit your 12mm thru-axle bike and allow attachment of any two-wheeled, hitch-mounted trailer, such as Thule, Chariot, Burley, Instep, Carry Freedom and more.

    Simplify your life by allowing quick and secure attachment of your trailer to your best and favorite bike. Share your stoke and enjoy the adventure!

    This axle will replace the R.A.T. axle found on all Cervelo R.A.T. equipped bikes. This axle includes our precision machined replacement derailleur hanger with with traditional threads, which creates a complete threaded thru axle system. Our derailleur hanger matches the geometry and construction of the stock derailleur hanger in every way, for crisp shifting performance.

    *Did you use our Axle Finder to find this product? That is the BEST way to find the thru axle that fits your bike!

  • Our Trainer Axle is designed to adapt your thru axle equipped bike with your wheel-on trainer, such as a 1up, Blackburn, Cyclops, Kinetic, Tacx, Wahoo and many other trainers. Our goal is to fit the thru axle to your bike perfectly, so we minimize spacers and extra parts, providing a clean, high performance axle for your bike. Train, warm up and be race ready and fit for the season.

    Cervelo owners with R.A.T. thru axles: This axle will replace the R.A.T. axle found on all Cervelo R.A.T. equipped bikes. In addition to this axle we include our replacement derailleur hanger with with traditional threads. This axle combined with the replacement derailleur hanger will provide a complete threaded thru axle system. Our derailleur hanger matches the geometry and construction of the stock derailleur hanger in every way for crisp shifting performance.

  • This axle is designed to replace your rear Cervelo R.A.T. thru axle with a simpler, sleeker design. Included with this axle is our Cervelo R.A.T. derailleur hanger into which the axle threads.

    Our Lightning Bolt-On thru axles offer the highest quality, simple, lightweight alternative to that bulky handle.

    Learn about compatibility with Hexlox security systems.

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