Tacx Flux 2 + Quick Release Adapter – Need Correct End Caps

Hi everyone,

I’m hoping someone can help me out.

I have a Tacx Flux 2 Smart direct-drive trainer and recently bought the Tacx Quick Release Adapter Set (T2840) to use with my Specialized Allez Sport 2021 (135 mm quick release).

The problem: the end caps currently on my trainer seem too large (looks like they’re for thru-axles), so my bike won’t seat properly.

From what I’ve found online, I think I need the Quick Release-specific block caps (part number S0053 / Garmin 117‑01575‑02) to replace the current thru-axle caps.

What I’ve tried so far:

  • Checked the Tacx documentation and parts list for the Flux 2

  • Reached out to a local bike shop (they weren’t sure)

  • Looked on Garmin’s site and some retailers, but couldn’t find these caps listed for sale

My questions:

  1. Can anyone confirm that part number S0053 / 117‑01575‑02 is the correct end cap set for this setup?

  2. Does anyone know if these can be purchased directly from Garmin, or is there a recommended source?

Any help would be hugely appreciated!