@_Grant_Peak_Cycles and @Paul_Southworth
Some backstory on the Zwift Cog variants with 18 teeth vs 14T. The tooth count does not matter for Tacx trainers, but does for Elite. Elite trainers have a higher resistance floor than other brands, and some riders find it’s too much resistance.. The 18T cog eases that resistance floor vs a 14T cog.
- We try to make it as convenient as possible to install a Zwift Cog, and when possible to install it without the need to buy a chain whip and Hyperglide cassette lockring tool. These are bike-specific tools required to change cassettes on your rear wheel (or trainer).
- The “multi trainer” 14T Zwift Cog comes preinstalled on a freehub body that fits the other Zwift Ready brands (i.e. Zwift Hub, Wahoo, JetBlack, and Van Rysel). This only requires you remove the drive-side axle adapter with a spanner you probably already own.
- We offer the Zwift Cog for Eite and Tacx trainers without a freehub body because the multi-trainer FHB won’t fit those trainers anyway. Why pay for something that you can’t use? The catch here is that you’ll need a chain whip and HG cassette lockring tool to remove your cassette, and swap it for the Zwift Cog.