Lightning Bolt-On Axle for NAILD fork – 15 x 100

(6 customer reviews)

$ 58.00

Our Lightning Bolt-On thru axle replacement for NAILD axles are a high quality, lower profile, simpler alternative.

  • Includes a threaded replacement nut, to replace the NAILD nut that came on your bike.
  • This axle is designed for any bike using Naild forks bikes with 15×100 hubs and NAILD thru axles. These are found on some Marin and Polygon bikes.

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. Compatible 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: LIG516.N Category:


  • Be free. No longer are you constrained by the proprietary NAILD axle. Simply replace the NAILD nut with our threaded nut and thru axle. A complete solution for a standard threaded axle for your bike.
  • 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.
  • 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.



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


  • This axle is designed specifically to replace the NAILD axle system found on some Marin and Polygon bikes with 15×100 hub spacing.
  • The axle includes our threaded replacement nut for the NAILD system.
  • Axle Weight: TBD
  • 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. No modification to the fork is necessary. 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?

6 reviews for Lightning Bolt-On Axle for NAILD fork – 15 x 100

  1. fred

    After seeing the Nalid system fail(specifically on the front on two Marin bikes), I needed a solution. Frustrated at the over-engineered, silly design of the Nalid, I was VERY glad to see Robert Axle Proj. finally came through! The replacement was simple, made with quality alloy, and was lever-free. Instructions were clear and design was a night-and-day difference, and SAFE. I ordered a set, front and rear. Thanks, Friends! We all appreciate your designs and support!!

    Bicycle Shop in Berkeley, CA.

  2. Byron Deorosan (verified owner)

    Hey there!

    The mechanism on my NAILD axle broke (apparently, a common occurrence). Wanted to replace it and apply Hexlox to it in the same fashion a orher bolts on my bike. Discovered you guys via the Hexlox website, but only found your NAILD replacement axle specifically on your website. Very happy that I did as I was advised to purchase a new carbon fork for a few hundred bucks if I wanted to get rid of the whole NAILD setup. Thanks so much for the rescue and my bike is back to cruising like a dream 😉

  3. Kevo (verified owner)

    Perfect replacement for the awful NAILD system. 10/10 fit and finish, quick delivery and easy install. Newly installed, so I can’t speak to the durability, but everything looks high quality and exactly as advertised.

  4. John B. (verified owner)

    Quality product with perfect fit to replace your Naild axle. A bit expensive but worth it. Shipping to Canada was extremely quick and affordable.

    The Naild axle was a nice idea but too complex and not durable enough therefore not dependable.

    Would be nice if they included a hex key.

  5. Allan (verified owner)

    Perfect replacement with good instructions

  6. Sal Monforte (verified owner)

    Awesome product and even better service! Was putting on new tires before a gravel race when the terrible stock NAILD front axle would not engage or tighten. Tory from Robert Axle Product got the replacement shipment expedited for me and I got both axles installed before race day. (I did the rear axle as well). No more overly-complicated axles.

    The product is beautifully machined and made in USA! Thank you Robert Axle Project for making a great product with a great team standing behind it. Will recommend to friends and use on future builds.

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