I'd originally posted this as a question about acceptable thru-axle thread engagement when spacers had been installed on a NEO2T.
Instead, I've since found a solution to the stock axle that came with my bike being too short. Details as follows:
I ran into a few issues that other people had in past, and one nobody seemed to talk about. The first two:
-
rear disc brake unit contacted the lower part of the NEO2T body - this is solved by adding a 2.7mm spacer sleeve to the non-drive-side (NDS) axle adaptor
-
rear derailleur contacted the trainer body while shifted into the lowest gear (largest cog) - this is solved by removing the freehub, the drive-side (DS) axle adaptor, and a small sleeve behind it, and installing both 1.0mm and 0.5mm spacers behind the sleeve before reinstalling the above parts & assemblies
Fixing the above introduces a new problem:
- the Bontrager thru-axle included with the Domane AL 5 isn't quite long enough to engage fully with the threads on the drive-side drop-out as the effective width is now greater.
Easy solution: install Tacx part T1708, "Trainer Axle for E-Thru, M12 x 1.75" with two of the three included spacers - thick for NDS, thin on DS - using only gentle torque to tighten in place.
Linked album has the whole process and end result: https://imgur.com/gallery/kTYCFdo
