Query on gearing on Zwift Bike

Hi,

Used Zwift for years but tend to switch between apps but never had a query before.

I am sure it is a setting but I have an issue.

Just switched over to the zwift bike as my current bike gave up, which I use on the trainer.

All seems to work but one issue. the Gearing feels all wrong. I tried a climb on lowest sequential gear and it said power was just 200W, my FTP is 275W but felt like I was pushing like 330W at 9% and heart at 175bpm when max is 183.

On the flat it says I am doing just 83W but this has to be wrong as HR is like 140 and more like 200W and speed proves this. I have Trainer difficulty set to Max as per what I have with my normal bike, trainer is a Wahoo kick Core.

Anything done wrong here ?

checked and someone suggested using Shimano gears and that is better but still feels like power is well short . See below and started on Friday with the bike and note all the difference after the bike and way different.

any help appreciated as I need these correct for Intervals.icu. I do have Favero pedals I can test out but can not do this for a few days as outside bike is in for a service and pedals on it !!

Have you used the Wahoo app to ensure that your trainer firmware is up-to-date? And have you calibrated the Zwift Ride in the Wahoo app? Those might be good places to start.

Thanks I checked the firmware was updated but not seen mentioned of the calibration before so will try that !!

thanks for that Nigel all sorted