A week ago I purchased Kickr Core (with 12 Speed Cassette) and Zwift Cog.
The Zwift Cog installation video, guided to keep the inner freehub spacer.
When installing the Zwift Cog, the spacer’s diameter is a little off, and is now fully stuck in my freehub spacer.
Fortunately, I had a spare freehub but I don’t have the inner spacer.
Three Questions:
Am I correct that the inner spacer is required?
Where can I get a new inner freehub spacer for the Kickr Core?
Am I correct in that the spacer should easily fit into the Zwift Cog ?
Hi @Benjamin_Moore_RBN , welcome to the Zwift Forums! The Zwift Cog is only intended to be compatible with the Zwift Hub. I do not recommend attempting to install the Cog onto a Kickr Core as there’s a risk of damaging any of the parts involved.
It’s an 11 speed freehub body, so you don’t need a spacer for a 12 speed cassette. The 1.8mm spacer is used for 8-10 speed cassettes, and a few 11 speed cassettes designed for a 10 speed freehub body.
In any case you can find a 1.8mm cassette spacer at any bike shop, Amazon, etc.
Thanks for the reply. Keep in mind I am referring to the spacer, inside the freehub itself, not the gear spacer. See below… (note these are images from the web and not my images specifically)
I ran into this same issue. I bought the Zwift Cog + click for my wahoo Kickr core. I noticed that the interior freehub axle spacer was too big for the Zwift cog. I did the mistake of forcing it in, only to find out the cog was not compatible with the Kickr core and there was play in the cog. I was unable to remove the spacer as it became permanently stuck. After searching the entire web, I was unable to find a replacement spacer of 17mm ID x 21mm OD x 13mm. I was stuck with a non-functioning trainer. After looking at the Zwift Cog I saw that there was a spacer inside the freehub between both bearings. I took my Dremel cutting tool and sliced open the freehub body. I removed the bearings and spacer. To my findings, it’s a 17mm ID x 20mm OD x 13mm spacer and it was
a perfect fit. I was able to place the original 12speed freehub back on my trainer and attached the the Zwift Cog on this original freehub. I can now use the Zwift Click.
