I’ve recently joined TR and so far am really enjoying the more structured approach to training. I’ve just finished week three of the Sweet Spot Base, Low Volume I training plan.
I use a Wahoo Kickr Snap (the model with external LEDs near the flywheel) and had up until today been riding with just my standard road tire on the back wheel (GP 5000s 25mm clinchers to be precise). Realising that my indoor rides have been eating this (very expensive) tire rather quickly, yesterday I decided to change the tire to a Tacx indoor trainer tire (23mm clincher). Today I did Eclipse, which I was expecting to be really hard. However, I actually found it much easier than Carson from a couple of days before. And indeed, my HR stats were higher for Carson (avg HR 151, max HR 177), than Eclipse (avg HR 149, max HR 165). Whilst I’d love to think I got dramatically fitter in the space of a couple of days, I doubt that’s the case.
With both the old GP 5000s and the new Tacx tire I would inflate to 110 psi and turn the knob on the Kickr Snap two full turns. I then do a spin down via the TR app on my ipad ten minutes into each workout. The spindown time when using the old GP 5000s would generally be around 30 seconds, and this morning with the new Tacx tire it was around 17 seconds. Based on the information on Wahoo’s website though, I didn’t think this discrepancy mattered, as long as the tire pressure and roller tension was correct (though of course happy to be told otherwise!). I did notice previously that there would be a slight “squeal” when starting each workout with the GP 5000s, but not enough to cause any tire slippage. I should also say I ride my workouts in erg mode and my gear selection was the same for both workouts - small ring at the front and middle of the cassette.
I think that the new tire has made things slightly easier but would be grateful for views from others as to whether this is correct, or if there might be something else at play. I think my next step will be to do a ramp test before my next scheduled workout to ensure my FTP is accurate (I did my first ramp test three weeks ago on the old GP 5000 tire). Ultimately, what I care about is consistency and ensuring that my training stays effective and in the right zones - if my power is higher with the new tire then I don’t want to shortchange myself through workouts that are too easy.
Of course, any advice would be hugely appreciated.