12mm Thru Axle for Trainer: 192mm with 1.75 Thread

(5 customer reviews)

$ 54.00

Our Trainer Axle is designed to adapt your thru axle equipped bike with your on wheel trainer, such as a 1up, Blackburn, Cyclops, Kinetic, Tacx, Wahoo and many other trainers. Our goal is to fit the thru axle to your bike perfectly, so we minimize spacers and extra parts, providing a clean, high performance axle for your bike. Train, warm up and be race ready and fit for the season.

In stock

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SKU: TRA202 Category:


  • This Trainer Axle is designed to adapt your high quality bike to your on-wheel trainer. These are compatible with all the popular brands: 1up, Blackburn, Cyclops, Kinetic, Tacx, Wahoo and more.
  • Our first priority is building a precision thru-axle. Our axles fit into your bike as well or better than the stock thru axle.
  • The axle is installed with a simple 5mm hex/allen key. The same tool that you carry on every ride.
  • The best part? When it’s time for your race or time to head outside, simply remove your bike from the trainer, remove the drive side axle end and go. Our axle is suitable for use on or off the trainer. Indoors or out.
  • Important: Before you order, make sure your specific trainer will accommodate the width of your modern thru-axle equipped bike. Measure your trainer at the widest setting and measure the outside width of your bike frame. Our the trainer axle ends will extend 15 mm past your frame on each side.


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 www.P65Warnings.ca.gov.

Additional information

Weight 0.3125 lbs



Robert Axle for Trainers replaces your stock 12 mm thru axle so you can use your bike on a trainer.

  • This axle is compatible with 1up, Blackburn, Cyclops, Kinetic, Tacx, Wahoo and many other on-wheel resistance trainers.
  • The true length of the axle shaft is 192 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 1.75 mm thread pitch.
  • The axle shaft and axle ends are precision CNC machined from 7075 aluminum, and hard anodized for rugged durability.
  • 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?

5 reviews for 12mm Thru Axle for Trainer: 192mm with 1.75 Thread

  1. Neil Reamer (verified owner)

    I bought this axle primarily for use as a replacement for my stock axle. I disliked the handle sticking out on the stock axle with no way to really manage which way it points when the axle is tightened. It had snagged on something at least once and come loose! If / when I get a trainer, the additional piece on the end will allow me to use that also. So, bonus there. I also own an axle for my BOB trailer. Works great! My bike is a Trek Fuel EX, not your normal everyday touring bike, but it works!

  2. Matt (verified owner)

    I wanted to convert the 142 QR style axle on my Trek Fuel EX7 to a true thru axle but don’t like the way the handles on 12×142 thru axles stick out and point weird directions when tightened. This fit the bill perfectly. It’s of excellent quality and finish and is even lighter than my son’s Bontrager thru axle. It still sticks out about the same as a lever but is a smaller profile and doesn’t have the lever part of course. Highly recommend this as opposed to the other limited axle options for Trek ABP bikes.

  3. David Wang

    Well designed and very well made. Installation was a cinch and the company was a pleasure to deal with! Thanks!

  4. Matti Purojärvi (verified owner)

    I bought this axle for my Trek Superfly FS 9.8 SL mountain bike that is mounted to Tacx Smart Flow trainer. The original Trek Superfly axle is not long enough to use in my trainer. However, I needed to do some tuning for the trainer to get 192 mm axle to fit. I am very satisfied the axle. I also very grateful to the service and especially being personally contacted from The Rober Axle Project because their want to ensure that the 192 mm axle would not be too long for my trainer. Thanks a lot for brilliant customer service!!

  5. Ben (verified owner)

    I bought this for my 2014 Trek Fuel EX8 so I could put it on my cycle ops fluid trainer and it fit perfectly.

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