# 12s cassettes question **URL:** \ **Category:** Equipment\ **Created:** [June 7, 2022, 8:24am UTC](https://wahoox.forum.wahoofitness.com/t/12s-cassettes-question/18720 "2022-06-07T08:24:21Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Prostopashka](https://avatars.discourse-cdn.com/v4/letter/p/cdc98d/32.png) [@Prostopashka](https://wahoox.forum.wahoofitness.com/u/Prostopashka)\ **Post date:** [June 7, 2022, 8:24am UTC](https://wahoox.forum.wahoofitness.com/t/12s-cassettes-question/18720/1 "2022-06-07T08:24:22Z")
Hi all, I have the following question with the Wahoo Kickr. I used to ride an 11s Shimano bike and used it on a Kickr in its original state with no issues. Now I have upgraded to a 12s Campa-equipped bike, and Kickr will also be used by my wife on her yet-to-be determined new bike. I’d like to make it all as much aligned as possible, but Campa-equipped bikes are unfortunately still rather rare. So my question is, do I have to limit both Kickr’s and my wife’s bike’s cassettes to be Campa 12s, or any 12s cassettes would work without issues? Many thanks! ---
**Author:** ![JGreengrass](https://sea2.discourse-cdn.com/flex020/user_avatar/wahoox.forum.wahoofitness.com/jgreengrass/32/2628_2.png) [@JGreengrass](https://wahoox.forum.wahoofitness.com/u/JGreengrass)\ **Post date:** [June 7, 2022, 9:02am UTC](https://wahoox.forum.wahoofitness.com/t/12s-cassettes-question/18720/2 "2022-06-07T09:02:13Z")
Campag 12sp uses the same freehub mount as Campag 11sp, so you will need to swap the freehub on your Kickr from your Shimano one to a Campag one. [CAMPAGNOLO FREEHUB | Wahoo Fitness UK](https://uk.wahoofitness.com/devices/indoor-cycling/parts-components/campagnolo-freehub-buy) Campag vary sprocket spacing across the cassette to improve shifting performance so if your wife gets a new bike with shimano 12sp the shifting will be sub-optimal if you leave a Campag cassette on the Kickr. [Compatibility [02] Cassettes | BikeGremlin](https://bike.bikegremlin.com/1232/bicycle-cassette-compatibility/) [Bicycle rear hub compatibility | BikeGremlin](https://bike.bikegremlin.com/1259/bicycle-rear-hub-compatibility/) ---
**Author:** ![Prostopashka](https://avatars.discourse-cdn.com/v4/letter/p/cdc98d/32.png) [@Prostopashka](https://wahoox.forum.wahoofitness.com/u/Prostopashka)\ **Post date:** [June 7, 2022, 9:15am UTC](https://wahoox.forum.wahoofitness.com/t/12s-cassettes-question/18720/3 "2022-06-07T09:15:41Z")
Thanks a lot for such a quick and clear answer. Seems like it will have to be a 12s Campagnolo bike then, which does limit the options, or I would have to get used to riding on a smaller frame to use her bike on the Kickr