Lightning Bolt-on Axle – Rear 12 mm x 174 mm x 1.75 Thread

Lightning Bolt-on Axle – Rear 12 mm x 174 mm x 1.75 Thread

(22 customer reviews)

$ 48.00

After years of mountain biking with thru-axles with bulky handles that seemed to strike every trailside obstacle we needed a better option.

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. Learn about compatibility with Hexlox security systems.

In stock

Get 20% Off Lightning Bolt-on Axles With Purchase of Any Trailer or Trainer Axle! Discount Automatically Applied.
SKU: LIG601 Category:


  • 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. 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.
  • Available Security. Compatible with Hexlox bike security systems.

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 174 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 12×142 hub does not equal a 142 mm long axle.
  • This axle has a 1.75 mm thread pitch.
  • Weight: 44 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.
  • Compatible with Hexlox security systems.


Need more information about how our axles work?

22 reviews

  1. Eric Van Dewoestine (verified owner)

    Perfect fit for my bike.

  2. ALEXANDER MACDONALD (verified owner)

    I bought one of these for my mtn bike. The quick release style thru axle that came with the bike was getting loose all the time, so I looked online for a bolt on thru axle and found this one. I’m really glad I did, because I’ve ridden that bike many times since I got the lightning bolt on thru axle and it’s never come loose. It stays put.

  3. Ed Caldwell (verified owner)

    I received quick feedback and ordered product arrived very quickly to match my bike and axle choice. Looks great and very streamlined. Waiting to heal from broken elbow before I venture out. This was one of the upgrades I have been wanting to do for some time. Thanks to Robert axle for making this high quality product.

  4. David Barnum (verified owner)

    Fast shipping, great customer service, and a perfect fit for my bike. And they’re made in Bend, OR! I highly recommend The Robert Axle Project.

  5. Chris (verified owner)

    This was a perfect fit for my bike. It is great quality, looks clean, and no handle to bang on the rocks anymore. Their ordering system makes it so easy to get a through axle that fits properly. I would not hesitate to purchase it again.

  6. Ted P. (verified owner)

    Fits just perfect! Wonderful customer service and assistance. In conjuction I am also using the HexLox security system. Great partnership. I no longer have to carry a security cable to leash-up wheels, etc.

  7. kyle (verified owner)

    There’s no good reason axles like this aren’t OEM. So much easier to install and maintain, plus no lever hanging out to catch stuff. Highly recommended.

  8. Adam Carlson (verified owner)

    After my Maxle died the LBS suggested I try this rather than buying a new Maxle through them.
    I’m so impressed.
    Fast Delivery, perfect fit, superb performance.
    I’ve rattled down some pretty rough brake ruts, steep fresh trail, huck to flat and everything in between. The axle hasn’t shifted, loosened or caused any concerns.
    Nice work Robert Axle Project.

  9. TJM (verified owner)

    I’ve only got about 20 miles on it, but so far so good. Considerably lighter than the stock through axle and having an actual torque spec means it is consistently and repeatably installed.

  10. Mauricio Altamirano

    Perfect fit and fast delivery, even in Germany! Really high quality product and I added the Hexlox bolt lock with the metallic insert. Now my bike is protected and looks great! Btw I have a Trek Powerfly 5, 2018 Model.

  11. Brady (verified owner)

    Perfect fit, great service, and great way to clean up your axles.

  12. Daniel Finnis (verified owner)

    Fits perfectly and is so much less fiddly than the cam-over/QR style that my Checkpoint came with.

  13. John Agler (verified owner)

    Replaced my Maxle lite quick release with the Lightning Bolt. What a difference. A real quality part.

  14. Rene Ortega (verified owner)

    It works and looks so good!

  15. Davey Sprockett (verified owner)

    This axle is perfect — fits good, looks good, stays put. Love a great American made product that I can put my trust in and this is one of those. My order was shipped promptly so my Honzo was back on the trail pronto — thanks Robert Axle Project.

  16. Will P (verified owner)

    I purchased a set fork and rear and they have the exact measurement as my bike’s need.
    These are so much lighter than the quick release thru-axle that came with the bike and I do see the benefit of bolt-on as now I don’t need to worry about the lever being caught by shrubs, etc.

  17. Michael McLeod (verified owner)

    The printout provided to match the thread pitch and length is golden. It made it so much easier to purchase the right part the first time. It fit perfectly. Would not hesitate to purchase again.

  18. Max Wallner (verified owner)

    Broke my maxle after a few years…the collet system just disintegrated. Found this axle website and saw it was a little cheaper…really I don’t care much about rear axles but the replacement seems great.

  19. Cris Domantay (verified owner)

    Perfect fit for my fezzari la sal peak! Found robertaxleproject thru YouTube. Very recommended.

  20. hal (verified owner)

    perfect fit for my trek 920. fast shipping, absolutely no issues.

  21. Jeroen Swart (verified owner)

    Absolutely brilliant.

    The multitude of axles standards, lengths, thread pitches etc made it a nightmare to find the correct set of axles for my Stigmata.

    In contrast , the Robert Axle Project website made it crazy easy to identify the right axles for my bike. I was worried because it just seemed too easy to be true.

    I received them in Cape Town at the Southern tip of Africa one week later. The price was great and with shipping included the price was still cheaper than trying to source axles at my LBS or on other online sites.

    The quality is top notch. Lightweight, quality machining and top notch finishing.

    I could not be happier with my purchase.

  22. Bike Rider (verified owner)

    The Lightning Bolt axle came in at the advertised weight. I commend Robert for being honest in his marketing.

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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: $21.50 USD, 10-14 business days

• All other International: $21.50 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.

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  • 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.

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  • Robert Axles for Kid Trailers are designed specifically to fit your 12mm thru-axle bike and allow attachment of any hitch-mounted trailer. These fit any trailer that has two wheels and a single point of attachment to the axle. This includes all the two-wheeled child, pet and cargo trailers such as: Thule, Chariot, Burley, Instep, Carry Freedom, and many more.

    Purchase our Kid Trailer axle for your bike. Share your stoke for cycling with your kids. Simplify your life by allowing quick and secure attachment of your trailer to your best and favorite bike. Enjoy the adventure.

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  • Purchase Robert Axle Thru axles and Hexlox locks for both your axles and for other vulnerable components.

    Here’s how:

    1. To secure your Lightning Bolt-On Axles, you’ll need one 6mm Hexlox for each axle. These include the magnetic insert for our axles which, since they are aluminum are not magnetic.
    2. Add at least one key to install and remove your Hexlox system. You will receive a key which matches the Hexlox you order. Order multiple keys if you want a spare.
    3. For other all other components, check your bike for what you want to secure. Options include Hexlox’s that fit in 4mm, 5mm and 6mm bolts, so check your bike and purchase what you need!
    4. Don’t forget to go here (link) and order our Lightning Bolt-on Axles  for your bike. Enter your bike information into our Fitment Selector database.
    Select options
  • The Drive Thru is a dummy hub, or chain keeper that replaces your wheel while cleaning the chain. It is fast and an effective way to clean your chain in between races or in your garage. It allows you to fully rotate your cranks and shift through your complete range of gears while protecting the frame. Installs simply with one hand, and is quick and easy to change between bikes. The Drive Thru is also great or packing the bike for transport. Originally developed by cyclocross legend, McGovern Cycles, now brought to you by The Robert Axle Project!

    *How to order: This product is thread pitch dependent. You must order the same thread pitch as the thru axle in your bike. Need help with that? Visit our What Axle Do I Need page for help with measuring your thread pitch.

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