On opening the cam lever of a 15mm through-axle, I have noticed it is possible to slide the axle out after only two whole turns. When installing the axle, more that two turns results in a cam tension that is too tight, less than two turns then the cam tension is too loose. I am concerned about safety and durability.
Does anyone know the minimum turns that a through axle should have in order to retain the wheel? Otherwise what is the typical number of turns from your experience? The bike in question is a cyclocross (if that makes any difference).
The image shows the threaded hole from the inside of the fork. The length of the bolt that goes into this whole matches the outside distance of the fork, however the bolt is tapered at the end so the thread at the very end is not used. The partially threaded hole seems to by typical of thru-axle designs to allow the bolt to pass into the fork for alignment purposes before threading begins. In this case however I believe there is insufficient thread.
This is a new bike and I have concerns over safety and long term durability.