I normally ride indoors on a Cycleops Hammer trainer, which won't turn on since last Friday, so I took out my travel trainer, a Feedback Omnium (without progress resistance), and have been riding it for the last a few days. Now the power is coming from the Quarq crankset on the bike.
This is what I found strange, for the same perceived effort, the power number on the Omnium is noticeably higher than the Hammer (both have been calibrated correctly and regularly). For example, for the same Zwift ride in London, the average power difference is over 20 watts, but the average speed only varies by less than 0.5 mph. My understanding is that the Quarq measures the power by direct force, hence, it should be accurate. If that's the case, does that mean the Hammer has been wrong, or is my feeling of perceived effort being way off?
This is what I found strange, for the same perceived effort, the power number on the Omnium is noticeably higher than the Hammer (both have been calibrated correctly and regularly). For example, for the same Zwift ride in London, the average power difference is over 20 watts, but the average speed only varies by less than 0.5 mph. My understanding is that the Quarq measures the power by direct force, hence, it should be accurate. If that's the case, does that mean the Hammer has been wrong, or is my feeling of perceived effort being way off?