Lightning Bolt-on Axle – Rear 12 mm x 172 mm x 1.5 Thread

(36 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: LIG604 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 172 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 12×148 hub does not equal a 148 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?

36 reviews for Lightning Bolt-on Axle – Rear 12 mm x 172 mm x 1.5 Thread

  1. Allan Taylor

    Awesone product, even better customer service, nuff said.

  2. Marco Lau (verified owner)

    Love this rear axle. Been wanting to look for a more solid, lightweight, replacement for the rear, and this is exactly what i was looking for. would recommend this for anyone wanting a solid rear axle to replace the stock factory lever setup.

  3. C Evans (verified owner)

    Great axle, nicely machined, nice weight, fits perfectly. Great option for increased security and cleaner lines

  4. Mark DePonzi (verified owner)

    Excellent product . Looks really clean. Now I don’t have to worry about grinding off my QR when I ride techie rock . Fast shipping too

  5. Kevin Jones (verified owner)

    I searched far and wide for the right axle … many promised, many failed to deliver. Robert Axle Project had exactly what I needed … and more. Superb customer service, super-fast delivery, and a superior product in every way.

  6. Larry (verified owner)

    Way better than the “big brands” out there!

  7. James (verified owner)

    Great customer service. Axle fit very well.
    Nice product!

  8. DCuny (verified owner)

    Really cleaned up my rear end. As a replacement for my through axle quick release.

    Great product and quality. Arrived super fast too.

  9. James Dewey (verified owner)

    Awesome axle! Replaced the faulty cam axle on my road bike and riding with confidence now.

    Ordered directly from RoberAxleProject and got it within two days after messing around with an online retailer. Thanks for the great service and great product.

  10. Sergey Melikyan

    Perfectly fits my Diamondback Century 5 and works great! Very clean look.

  11. Sam (verified owner)

    Ordered for my 2017 DB HAANJO. Shimano thruaxle was noisy as hell ! really annoying. Installed the lighting bolts, love em’ , simple, expertly engineered and machined piece. Cleans up the appearance, totally quiet and bombproof. I’ll be ordering a trainer specific thru axle this fall.

  12. Richard Comroe (verified owner)

    Very well made product! Shipping was extremely fast and I’m 100% satisfied. The axle won’t accidentally loosen since it has no QR and is tightened by a hex key. Highly recommended!

  13. Richard Samonte (verified owner)

    Had to settle for this, wish they would make one more sized a bit bigger 172-178 is a big jump. Needed one in the middle.

    It does the job tho

    Fit and finish still good.

  14. Luke (verified owner)

    Awesome new axle for my gravel steed. Very lightweight yet strong at the same time. Careful thought was put into this axle. Also, painlessly determining which axle I needed was very cool. I ended up going with a Robert Axle just recently when I needed a trainer axle. Super quick turnaround time was appreciated as well, 3 days!

  15. Alex MacDonald (verified owner)

    I bought one for my 2015 Giant Anthem. Great product!

  16. Renate Beske (verified owner)

    Wrong size but assuming it was my fault. Waiting for refund. (Been just over a week that I mailed it back with ra#.). Ordered replacement and that one arrived in a few days and was perfect. (Ordered rear Instead of front .)

  17. Renate Beske (verified owner)

    Needed a non quick release for mounting on truck bed rack.

  18. Daniel Syllaba (verified owner)

    Searched for quite a bit to find the rear axel I was looking for and found it! Great product and service!

  19. Kyle (verified owner)

    Perfect fit. Asked for expedited shipping. Wish granted! Thanks!

  20. Landon Lamley (verified owner)

    Very Cool stuff. Nice Thru Axle. Better Quality and more solid than the others which I think are made in Taiwan. Nothing wrong with the Taiwan stuff, just Robert Axle looks even stronger.

  21. Robert V (verified owner)

    immediately looking at the axle you can see the top notch craftsmanship . i have not ridden on it yet , but i”am sure it will be much more solid, than the small skewer type i had . service was really good also, my axle shipped out within a day . Rob V

  22. KrikkeSteen (verified owner)

    Dankzij de goede uitleg de juiste keuze van produkt gemaakt. Prima produkt.
    Made the right choice of product thanks to the good explanation. Great product.

  23. Barrows (verified owner)

    Fits perfectly on my Yeti, much cleaner look, dropped a bit of weight, and functions perfectly. Could not ask for more in such a simple and well made product.

  24. Andrew E (verified owner)

    The bike matching system worked a treat . Purchased front and rear Axles- they substantially lighter than the stock set and a perfect match for the bike . Excellent customer service , product arrived within days to NZ.

  25. Jeffrey (verified owner)

    Superior product, excellent strength and featherweight. I use these front and rear on my carbon road bike and enjoy knowing that my wheels are securely bolted on with a specific torque setting rather than relying on an arbitrary “feel” with a skewer-type fastening axle. The fit is flush and provides a more aero form factor and overall cleaner appearance on the bike. I was really impressed with the weight savings advantage over a skewer-type through axle. Precision made in the USA…look no further for your axle solutions.

  26. Kellin Stein (verified owner)

    Lightning! Lightning! Lightning! This TA is a definite, lightweight upgrade for my 2019 Bombtrack Hook EXT-C and fits perfectly without any fitment issues. Absolutely recommend this TA to others, especially if you live in Bend or Oregon – what a better way to support a local company!

  27. Paul (verified owner)

    Nice axle. Fit was right on. Better than the rock shox maxle I had on. I liked that the Rob Axle was 6mm Allen vs the 5mm on the Rock shox. Which keeps it the same as the front 6mm axle. Plus less chance of it rounding off like I did with the Rock Shox.

  28. Basim J.

    Excellent product, quality, and craftsmanship. A nice US-made product readily available with excellent customer service!

  29. Gary (verified owner)

    Great communication, fast shipping, easy peasy!

  30. Ben Thompson (verified owner)

    Great, sturdy, and arrived quickly, perfect for my Marin San Quentin!

  31. David Kutassy (verified owner)

    E-mailed staff to confirm which axle I need and got a quick reply. Ordered the axle and it’s a perfect fit. High quality and super light axles with great customer service. Can’t possibly ask for any better.

  32. Jon (verified owner)

    Perfect fit and super fast shipping as always! I don’t bother to look anywhere else for high quality thru axles.

  33. Roberto (verified owner)

    Light, strong and looks good. The George Clooney of axles.

  34. Patrick J Quairoli (verified owner)

    I was doing a frame swap and the factory axles felt soft, cheap, and bulky. The Robert Axle Project thru axles were my splurge item to finish my build.

  35. Dixon Dykman (verified owner)

    Fit like a glove. Excellent! My only complaint is with the US Post Office who thought it would be a good idea to ship it from Oregon to Colorado via New Hampshire, adding a week to the delivery time.

  36. Chris (verified owner)

    Best customer service I’ve ever received. Product works flawlessly. Will definitely convert future bikes to these axles.

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