First-time Pt user - Realization stinks

goodboyr

Right! And the numbers that KK suggest you put in the KK computer when you're using a Fluid 2 are for the older unit. When you use them on a new Cycleops, they are wrong. I am surprised they don't have the new numbers on the KK site.

far-sided

Looks like you're exactly right. From the Cycleops web-site...


The numbers I was using had 22mph equal to 401W and 25mph was 571W for the older Fluid2.
Guess it's' time to re-test FTP and just cover up all numbers except for time.

freeagent35

I use a Computrainer as a point of comparison (PRO Lab model, dyno calibrated). 300 watts at 20 mph sounds kind of high, but then again load can be a real variable. As another point of comparison, I'm 40, 5'8" 175. Resting pulse is about 45. I tend to shoot for 210 average watts over a 1 to 2 hour ride with interval efforts of 400 to 450 sustained (30 seconds to 1 minute), moderate intervals of 350 approx (1 to 2 minutes during climbing sections) and peak sprints of about 600 watts. Average heart rate will run around 160 for such an effort. My upper end is somewhat limited by my gearing (compact 50/12 top end, needed to avoid overgearing on the climbs). I ride at about a CAT 3/4 level.

Clearly the Power Tap is the superior device. I would tend to trust it. It might be interesting to wear a heart rate monitor on both and compare the average pulse rates for the 300 (trainer) vs. 210 (PT) effort. 210 for an hour (average) is harder than it sounds, especially if coasting or drafting is being averaged in.

Happy training.

mikeyp123

I have the old model Fluid 2 and the KK Road Machine. I found the Fluid 2 to be a total knee killer, too much resitance. Meassured with a PT, the KK at ~20mph gives me about 225 watts. I can't remember what the 20mph was on the Fluid 2, but do remember 17mph was a killer hard workout, probably around 230 watts.

KK gives me more gearing options.. yet not too easy for my wimpy 240 FTP.