Old 06-09-19, 11:04 AM
  #74  
fronesis
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Originally Posted by ChinookTx View Post
...I'm wondering if those of you who own the Whipshot had issues with your rear Thru-Axle lock disengaging while riding?

I was out on the trails yesterday, and twice the lock disengaged and the skewer was slowly coming off loose.
First off, great pics – looks like a gorgeous ride!

As to your thru axles: you mention a “lock,” but I’m not exactly sure what you are referring to there. I have thru axles on a few bikes, and my understanding is that the threaded “bolt” of the thru axle simple threads into the bike frame directly, and it is held in place there by being at the correct torque spec. So it’s never really “locked” in place or “unlocked” it’s either tight enough at its proper torque spec, or it’s LOOSE.

A few thoughts there:
1. By “lock” I suspect you might be referring to the quick-release like “lever” on the standard DT Swiss thru axles that came with the whip shot. It’s possible that somehow that lever is vibrating loose and this would obviously lead directly to a loose axle.

2. I HATE those thru axles because they make it impossible to know if you have the torque spec correct and because the extra force added by the lever makes it hard to always return to the same torque (which effects the caliper/rotor centering). Accordingly, I sold thus “quick release” thru axles on eBay and replaced mine with some really nice Robert’s Axle project axles. These tighten with a 6mm hex, so you can use a torque wrench on them and get the proper torque.

3. Note: the torque spec on most 12mm thru axles is quite high, around 15Nm or 132inch-pounds. I have encountered a number of riders who had loose thru axles because they didn’t tighten them enough. And I made the same mistake myself on my first thru axle bike: what feels “pretty tight” by hand for me was only around 80 inch-pounds. To get to 130 inch-pounds requires some real force (I’m weak).
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