pgp128 wrote:
I have an interesting anecdote, not about trainerroad specifically, but moreso about the trainer(s) I use with it. I was recently forced to switch trainers (I noticed the roller on my old one is visibly worn down, and a new trainer tire I installed kept slipping). This old trainer was one I got off craigslist last year, a performance travel trac 3 (I'd imagine from the early 2000's), so I had been using the travel trac profile in TR and assumed it would be in the right ballpark, assuming that manufacturers maybe not tinker too much with the curves. On it, my virtual power FTP was 230. The thing about this particular trainer is that it doesn't have a knob to control the height of the roller, you just have to lift a spring loaded base. I'll get back to this point in a bit.
So yesterday I started using an ascent fluid that I had recently bought for my wife to use. I did a quick ride, spending about a minute each on various gear combinations at 90rpm and checking against some gear/speed/cadence calculators to make sure there was equivalency there and getting the roller resistance right. I did an FTP test to get a sense for how to work with this new trainer and had an FTP of 232!
I realize this stuff is apples-to-oranges comparisons, but I'm stumped as to why there's such a huge difference. I do notice with the ascent that it feels a lot more natural, the travel trac always felt like it had way too much resistance as my effort increased. Maybe I had incorrectly applied the travel trac profile but maybe it didn't fit this particularly old model I have, or maybe the quirky roller setup made me put too much resistance on the tire. Who knows, but I certainly like the idea of having a 232 FTP (4.62w/kg) vs 230 (3.29w/kg), especially since I've only been riding a little over a year! Of course, the truth may be somewhere in between, the key for me is to keep pushing myself with consistent measures, which TR definitely has provided. Just was curious to figure out what the user error may have been. Regardless, I definitely feel I'll be ready for my first season of racing thanks in part to TR.
I'm confused. 232W is 4.62 w/kg, 230W is 4.58 w/kg. What numbers are you using to get 3.29 w/kg?