I recently treated myself to a new smart trainer a cycleops 2018 hammer I really like the feel of it, its much quieter and smoother and the resistance changes are great.
makes Zwift a lot more realistic and enjoyable.
(what I used to use which was a elite Muin just a dumb one paired with a power meter)
anyway Ive done a couple Zwift races on it and it seemed to read a lot lower power than my Garmin vectors and Shimano 9100P.
after the first race I made sure everything was up to date…
- hammer software,
- Garmin vectors firmware
- Shimano power meter firmware
- calibrated the trainer using the rouvy app
even chucked a brand new dura-ace chain on (as I read that you can loose a bit through old chain, it was due a change anyway)
the trainer came with a brand new Ultegra cassette.
so the second race I dual recorded with the vectors running in the background as well as the Shimano.
the power averages was like this for the 1hr long race
cycleops hammer: avg power : 261.8watts
Normalised Power: 330.4watts
Max watts: 1105watts
Garmin Vector: avg power: 310.4watts
Shimano 9100P: avg power: 306.4watts
Max power: 1144watts
as you can see the hammer is around 15% lower than the vectors, I feel like I’m missing something I have read other places the smart trainers can read lower than power meters but it seems quite a lot.
I have a SRM sitting on another bike which I might have a look at the difference tomorrow but the SRM always felt very similar to the Shimano 9100P its not going to be 50watts different.
has anyone else had anything similar with a Hammer or any other trainer.
thanks for any input!