Thunder Bolt-On Rear Axle – 12mm x 229mm x 1.75

Thunder Bolt-On Rear Axle – 12mm x 229mm x 1.75

(7 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.

SKU: BOL207 Category:


Additional information

Weight 0.3125 lbs



7 reviews

  1. Scott Bixby

    High quality axle, nice fit and finish. No more creaking caused by the cheap OEM QR axle always coming loose.

  2. Marcel (verified owner)

    The best!!! I exchanged the stock axle on my 9zero7 carbon whiteout because issues with the quick release, this axle could not have worked better. Peace of mind! Highly recommended.

  3. David M (verified owner)

    Great axle. Replaced stock axle on Trek Farley 9.6. Fit is perfect. Recommended!

  4. Mike (verified owner)

    Nicely made – Allowed me to convert my Kona WO fat bike to a through axle! Kona has through compatible drop outs to fit the bike, but do not offer an axle. Was looking around for quite a while before I came across the Robert Axle Project.

  5. Marco DeAngelis (verified owner)

    Awesome product and great customer service!!! Gave me a great solution to thru axle my fat bike.

  6. Dave Katzmann (verified owner)

    Replaced the rear axle on my 907 carbon Whiteout (had issues w the release lever…which have now also happened on my front axle). Got really helpful information prior to ordering, axle works great and has gotten the attention of all my riding buddies who like how clean it looks. Definitely recommend to others…and wish that a front axle fix existed!

  7. Tryon Bike (verified owner)

    Thanks! We needed an extremely unique axle for our fatbikes and Robert Axle Project is the only one who makes it. Super easy to work with and fast shipping. Thanks for hooking us up!

    – The guys at Tryon Bike

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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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