For the past 6 months I’ve been using a Whoop Kickr Core for my training and measuring my power through the trainer. I recently bought Assioma Uno pedals and have been recording my workouts on my head unit using the pedal’s power measurement while also recording my workouts in the Trainer Road app using my trainer’s power measurement.
By using this method I have determined that, over the course of an entire workout, the average wattage measured by my trainer is 10-20w higher than my pedals. My FTP is only 227 so that’s a pretty significant difference.
If I want to switch to doing my workouts in the Trainer Road app using power matching with my pedals and trainer how can I account for this difference?
I really don’t want to have to manually adjust all my workouts to 95% intensity for the next several weeks until my AI FTP detection kicks in and if I manually adjust my FTP in the app then the AI will turn itself off. But if I don’t make any sort of adjustment at all I’m going to fail all of my sweet spot and threshold workouts for the next two weeks. It feels like there’s no good option here. Has anyone gone through this before and if so how did you manage the switch?
I have come across this as well between my assiomas and my kickr core.
I do a spindown calibration of my kickr every few days and call it my ‘baseline’ power.
I record my workout on the 2 units like you describe, and use DC rainmakers power meter comparison tool to get an avg percent difference. I use that difference to adjust the slope % of my assiomas to read 1–2% higher than my kicker (accounting for drivetrain losses)
I have had the same issue, my trainer (SB20) reads higher than my pedals but pretty inconsistently but anywhere between about 8-16w difference. My current FTP and therefore my workouts are based on the higher numbers so some of my workouts have been brutal. My FTP prediction is dropping but that is to be expected. I have used the workout alternative and chosen an easier workout which is what I would suggest until the FTP catches up.
I’d just start using PowerMatch with your pedals and rate your workouts as they feel.
If you need to lower the intensity of your workouts when using your pedals, that’s okay. We’ll see that and make adjustments to your upcoming workouts.
Make sure you have your pedals set to the right crank length. I thought I was dealing with 6% low trainer, turns out it was just the pedals reading high.
So it’s unlikely to be that range at all power levels, it’s likely a different curve where the variation at 100, 200 and 300 are noticeably different. I’d take Eddie’s advice. Make the switch, let the TR system adapt. Preferably do some endurance and sweet spot before say workouts with intervals of 120% ftp.
I luckily you have been using your Trainer as the source, and the Assioma have the ability in the app to do a power factor adjustment anywhere from x1.0 to 1.1 or 0.9 or whatever to scale the pedal power a bit. My trainer doesn’t have a similar feature, so forced now to just either use two different powers… or scale my pedal DOWN to match trainer for indoor/outdoor workouts. Currently using power match with both (pedal as source of power).
Make sure you have crank length selected and that you have done a spin down calibration on trainer. Typically it is the other way around… with Pedal reading 10w or more higher.
If your difference after testing/ calibration remains… I would probably slightly adjust Assioma towards the trainer… to meet in the middle. Then use power match as Eddie suggestesd.
