Saris Bicycle Thru Axle Adapter 142x12mm 1.00 Thread Pitch

This adapter does exactly what I wanted: allow me to ride my Specialized Roubaix 11 speed bike on an older model of trainer, specifically the Cycle Ops Power Pro Series trainer. It was a little fussy to install the axle adapter in the bike (detailed instructions or a YouTube video would be appreciated) but in a few minutes I was able to figure it out. The trick is to center the assembly correctly. Here's some detailed instructions: 0. REAR WHEEL: Unscrew your original bike axle and save it. 1. 142mm THROUGH AXLE KIT: Remove both axle caps from adapter with a 5mm hex key. 2. Remove all spacers and save them. You should now have a bare axle. 3. Insert bare axle (fine threads first) into non-freewheel side of hub. 4. From non-freewheel side, a 5mm hex key fits into the axle. Use it to screw axle in until it protrudes evenly on both sides of hub/dropouts. I used a caliper but you can do it by eye, it just needs to be close. 5. Install three 2mm spacers on the freewheel side and secure with axle cap. 6. Install one 5mm spacer and axle cap on the opposite side of hub. Done. I hope that makes sense. Tip: after mounting in your trainer, take care the first time you put your full weight on the bike + trainer - my axle adapter ‘snapped' into place sharply! Why? It had not been correctly seated in the trainer receptacles. It looked fine, but somehow was not quite perfect. No harm done! It has been trouble free and secure since.