I am trying to replace the original rear axle with a trainer axle(https://www.amazon.com/Kinetic-Traxle-Fine-XL-T-2120/dp/B00SD9CIZA/ref=asc_df_B00SD9CIZA/?tag=hyprod-20&linkCode=df0&hvadid=312131999963&hvpos=&hvnetw=g&hvrand=8509888933102791366&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9008419&hvtargid=pla-405660313163&psc=1®ion_id=972485)The hanger bolt seems to prohibit this. Is it possible to fit a trainer axle to TD 3.1?
It does not appear that the axle you have linked would be compatible as the derailleur hanger nut on TD3 is 10mm and an axle is 12mm, so it will not be able to pass through the nut.
It is possible to mount TD3 in trainers that replace the rear wheel (such as wahoo or zwift?).
Flaanimal and TD4 would allow for the use of an axle that threads all the way through such as the linked one.