Hi
so following the advice I received in an earlier thread I did the stomp test on my powertap SL today. Mounted it in the turbo, got a friend to hold the back brake on and measured the torque standing on the right pedal in 5 different gears. I then calculated the expected torque using my weight, crank length and the gear ratio.
The measured torque was higher than the expected value by 8%, 7%, 6%, 9% and 9% in the 5 gears I measured. Needless to say I'm none too chuffed about this. Does anyone have any ideas why this might be before I sulk and give it a good kicking?
BTW knocking 8% off the PT values I obtained in the interval workout I posted previously would put all the values within 2% of the reading I got from the ergomo. Which right now is looking like the better purchase.
so following the advice I received in an earlier thread I did the stomp test on my powertap SL today. Mounted it in the turbo, got a friend to hold the back brake on and measured the torque standing on the right pedal in 5 different gears. I then calculated the expected torque using my weight, crank length and the gear ratio.
The measured torque was higher than the expected value by 8%, 7%, 6%, 9% and 9% in the 5 gears I measured. Needless to say I'm none too chuffed about this. Does anyone have any ideas why this might be before I sulk and give it a good kicking?
BTW knocking 8% off the PT values I obtained in the interval workout I posted previously would put all the values within 2% of the reading I got from the ergomo. Which right now is looking like the better purchase.