Lightning Bolt-on Axle – Rear 12 mm x 159-165 mm x 1.5 Thread

(20 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.

Out of stock

SKU: LIG612 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.


Prop65 Warning icon

WARNING: This product can expose you to chemicals including nickel acetate, which is known to the State of California to cause cancer. For more information, go to



  • The diameter of this axle is 12 mm and the true length of the axle shaft is 165 mm. We include a 6 mm spacer for a 159 mm long axle fitment. 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 1.5 mm thread pitch.
  • Weight: 38 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?

20 reviews for Lightning Bolt-on Axle – Rear 12 mm x 159-165 mm x 1.5 Thread

  1. Matthew Brennan (verified owner)

    Absolutely perfect. I purchased the thru-axle to use with Hexlox on my Scott Solace. Still waiting on the Hexlox to arrive, but the axle worked perfectly.

  2. John P. (verified owner)

    Perfect fit/function on my Giant TCX advanced.

  3. Sam W. (verified owner)

    High quality axles with precise threads and clean labeling. Lightweight. Good looking. An excellent product.

  4. Martin L. (verified owner)

    Originally bought one of the trainer specific axles for my Giant TCX. Got a message back before the product shipped that I probably didn’t need it, as my stock axle should work fine with my trainer. However, the rear axle that came with my Giant TCX cannot be securely fastened on my CycleOps Hammer due to the length of the handle on the stock thru axle. So, I was recommended this product instead and it shipped fast. As expected, it works great. The only wish I have is that the washer, a single one (6mm I believe), would instead have been two washers of 3mm each. Using just on washer would’ve made for a perfectly flush fit on my Giant TCX (although this doesn’t matter much on a trainer). Excellent customer service!

  5. Jenn (verified owner)

    Perfect fit on my Liv Langma. Beautifully low profile and light.

  6. Sean McBride (verified owner)

    Superb product, light and strong. Service was excellent even when I messed up my order was corrected very quickly and politely. Quick post to the UK too.
    I’m very pleased and have already recommended.

  7. Alan Floyd (verified owner)

    This axle was a direct replacement for the bulky stock rear thru axle. Cleans up the look of my Giant TCX-CX. Thanks for making a high quality axle!

  8. Harris S. (verified owner)

    Fantastic fit for my Devinci Hatchet. Roughly half the weight of the stock thru axle and way easier to install and remove! Have bought one for my trainer, as well as a set for my road bike!

  9. Brian (verified owner)

    Purchased to use with Hexlox and replace the quick release axles on my All-City Cosmic Stallion. Lightweight, well-made, and easy to install. I now have greater peace of mind when locking my bike away from home. The cleaner look is an added bonus. Very satisfied.

  10. Doug (verified owner)

    I have used RAP axles for both front replacement and rear replacement of the QR15 and QR rear axles that come with the frame and forks. I’m only buying custom build bikes so each part is important to me. My latest build is a gravel bike and the ENVE fork has a 100×12 through axle that sits nice and flush to the fork. I can’t imagine leaving the rear axle as a QR with a big handle sticking out. The RAP Lightning Bolt is great upgrade and gives it a clean look. I’m going to carry a multi-tool anyway and prefer my bikes to not have handles sticking out.

  11. Gary (verified owner)

    Great company and support. Fast shipping, quality product. Love it! Thanks

  12. tony sells (verified owner)

    Great product, the machining is exquisite and great low profile. Robert Axle helped me thru the selection process without a hitch. My application required the use of a small spacer, i was nervous about that but it worked out great and they even supplied black ones to match.

  13. Manny (verified owner)

    Contacted them with a question for correct assistance with correct axle for my Bianchi Sprint disc. Received quick reply with exact part number. Shipped immediately and received within a few days. Product is of great quality. Fit and finish is great. Bike looks so clean….

  14. Jack Preijers (verified owner)

    Company – very responsive to questions and exchanging out my axle for a different size.

    Product – these axles should be standard on all thru axle bikes. The stock version doesn’t hold up. I have a lot more confidence these won’t break mid-ride.

  15. Johan Malkoski (verified owner)

    Great customer service except for getting charged a restocking fee on the axle that I was told was needed from the photo and sizing of my existing axle I sent them. Not sure how I get charged for their sizing mistake? Regardless, it was handled and replaced and the new axle works like a charm. Looks great too.

  16. GerryD (verified owner)

    Rear is to short, front is to long. Finish is like a thread, not good on a stressed part or for precision fit. Should have sent them back.

    • Katy

      We are sorry to hear this. Can you send us an email at info[at] so we can get more details on why you are unhappy with the product? Thanks.

  17. YY (verified owner)

    Hated the thru axle that came with my Jamis Xenith pro, it would come loose often and never feel secure. These fit perfectly and more securely.

  18. Aaron (verified owner)

    Incredible service and support. Part is machined and made to a super high quality

  19. Jan Martijn (verified owner)

    High quality products, great replacement of the original clunky thru axle. Very fast delivery to Europe. And responsive and helpful customer service.

  20. Dave Warner (verified owner)

    This axle did not fit. I think it was because Jamis provided the wrong size to Robert Axle Project. The response I got was amazing. Tory made sure I had a new one that DOES fit really quickly. Thanks!

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