Thunder Bolt-On Rear Axle – 12mm x 217-229mm x 1.0 Thread

(9 customer reviews)

$ 57.00

Designed for big rides and big riders. Our Thunder Bolt-On replacement thru-axles are a strong and durable option to replace your stock through axle. Thunder Bolt-On Axles are NOT for use with a trailer, but are a solid option if you’re looking to replace your stock thru axle with a more durable, lower profile design. If you want a lighter weight axle, then check out our Lightning Bolt-On Axles.

This is NOT an axle for attaching trailers or trainers.

In stock

Get 20% Off Lightning Bolt-on Axles With Purchase of Any Trailer or Trainer Axle! Discount Automatically Applied.
SKU: BOL215 Category:


If you’re tired of having a thru axle that sticks out far past your hub, but you’re skeptical of ultra-lightweight parts, then the Thunder Bolt-On Axle may be for you. Simple, clean, and very strong, these bolt-on thru axles are a perfect alternative to your stock thru axle. Easy to install and remove, too!

If you want a lighter weight axle, then check out our Lightning Bolt-On Axles.


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

Additional information

Weight 0.3125 lbs


Thunder Bolt-On Axles replace your stock thru axle on your 12 mm thru-axle equipped bike.

  • The diameter of this axle is 12 mm and the true length of the axle shaft is 229 mm. A flat spacer and a tapered x-12 spacer is included for a 217 mm 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 12×97 hub does not equal a 197 mm long axle.
  • This axle has a 1.0 mm thread pitch.
  • 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. Design allows for installation or wheel removal using your standard 5 mm hex wrench.
  • Designed, built and quality tested in the USA. Proven around the world.


Need more information about how our axles work?

9 reviews for Thunder Bolt-On Rear Axle – 12mm x 217-229mm x 1.0 Thread

  1. Alexander (verified owner)

    Perfectly described and documented on the website, it was no surprise that the axle I bought fit perfectly and did it’s job on my first fat bike bike packing trip.

    Great presages Support with the printable size guide etc.

  2. TD (verified owner)

    Great product, works as described, fixed the issue of a loosening rear axle on my Fat CAAD 1. Great support as well. Thanks!

  3. Mike Graham (verified owner)

    Great axle, machining and quality is top notch. Correct length, spacing and threads are perfect and replaces the QR with style. Nicely butted to reduce weight on the centre section that sits inside the hub. A definite upgrade for my Fatcaad 3.

  4. Kevin (verified owner)

    Works great. Far better than the original axle on my Cannondale Fat Caad 3. Excellent quality and fast shipping too.

  5. Jim (verified owner)

    Worked perfectly saved me from trying to get it from the bike manufacture.
    Easy search on website.
    And quick ship

  6. Cale (verified owner)

    The axle finder made the decision easy. Only retailer I was comfortable purchasing a replacement axle from without worrying If I had the correct thread and length. Shipping to Canada was really fast as well.

  7. Werner (verified owner)

    Tut was es soll. Sehr gute Verarbeitung. Nach 3Tagen war die Lieferung in Hamburg. Perfektes Tool auf der Website.(Axle Finder) um die richtige Achse zu finden. Sehr guter Service!

    English Translation: Does what it should. Very good workmanship. Delivered to Hamburg in 3 days. Perfect tool on the website (Axle Finder) to find the right axle. Very good service!

  8. Paul from Wisconsin (verified owner)

    Used the axel finder and it worked flawlessly, perfect fit and better than stock!

  9. Rob (verified owner)

    Great product, keeps my Fat bike going. Delivered on time as promised.

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