I have purchased a tacx flow so i can use power to train with in the long winter months in the north of the uk.
When the device is calibrated i think it measures how long the wheel takes to slow down and gives you a reading from a negative number through to positive numbers. Negative numbers mean the runner is less tight against the wheel and and positive number means the runner is on the tight side against the tyre.
Now even though the tyre pressure is always the same and how tight the runner is against the wheel is always the same I get different readings when calibrating.
I always do 15-20 mins warmup and then calibrate.
Now if the setting comes out as + 5 for eg do i need to slacken off the runner until it gets close to zero as possible?
If i do then the tyre slips.
Also if I get a different reading for calibration each time but ride @ say 300W (I wish) does it mean the 300W pertains to the calibration setting or does it mean i may be putting in more or less effort to turn the pedals at a set power. In otherwords is 300W really 300W what ever the calibration setting?
anyone ideas would be great!
bullboy /img/vbsmilies/smilies/hissyfit.gif
When the device is calibrated i think it measures how long the wheel takes to slow down and gives you a reading from a negative number through to positive numbers. Negative numbers mean the runner is less tight against the wheel and and positive number means the runner is on the tight side against the tyre.
Now even though the tyre pressure is always the same and how tight the runner is against the wheel is always the same I get different readings when calibrating.
I always do 15-20 mins warmup and then calibrate.
Now if the setting comes out as + 5 for eg do i need to slacken off the runner until it gets close to zero as possible?
If i do then the tyre slips.
Also if I get a different reading for calibration each time but ride @ say 300W (I wish) does it mean the 300W pertains to the calibration setting or does it mean i may be putting in more or less effort to turn the pedals at a set power. In otherwords is 300W really 300W what ever the calibration setting?
anyone ideas would be great!
bullboy /img/vbsmilies/smilies/hissyfit.gif