The reason I ask is because on my Kickr Core the drivetrain makes a slight grinding noise (I can even feel it a bit as I hit the bottom of my stroke). It’s more obvious the harder the gear. Not sure if this is normal with new cassettes (I’m using the Ultegra) or if I’m misaligning something?
What is the tallest gear of the Tiagra? Also what derailleur are you using? Shouldn’t have an issue. I’m using an 11x28 with a short cage derailleur and it’s ok. Sounds like a potential misalignment somewhere
I’ve never used two different sized cassettes. You might be slightly off on the index since you’re going from a 32 to 28. Maybe someone else can comment if that’s potentially the issue. It would be pretty inconvenient to re index every time you swap from trainer to wheel.
I would suggest indexing the gears for the 28 if you haven’t already and see if that gets rid of the grinding
Get yourself a decent metal ruler and learn how to check your drive train for wear. It’ll save you from destroying a new cassette (if that’s the cause of the grinding).
I own a few bikes and often swap bikes on the trainer without changing the cassette over. Provided your staying in the tooth range that the chain and derailer is set for you shouldn’t have an issue with chain length/derailer travel.
Just be aware that the chains get narrower as you add gears to the cassette. The length of the links stays the same, but a 10 speed chain won’t fit a 12 speed cassette for example.
Hi, apologies for jumping on this thread but its close to answering a question i have.
I’m new to cycling and recently boughf a kickr core for fitness. Although i didnt even have a bike, my brothers leant me his 10 year old giant road bike with a 9 speed shimano tiagra groupset to out on the trainer. I think im right in thinking o could add a 9 speed tiagra or sor cassetter but im not sure what ratio id need or even what that means? Anyone able to advise?
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