I have had a powertap for a while and then also got a set of Vectors (and a Wahoo Kickr...). However, I felt power numbers were off on the vectors so this am i did a comparison riding with the powertap and the vectors. Average power for a couple of minutes: vector 120 watts, pt 150 watts...

Started working on the vectors:
-- rechecked the torque so it is at 35 newton meters
-- did a static calibration
-- took out the batteries

All that seemed to help and the 2 powermeters were at 152 and 151 watts for the next short test. Now, I do not know if the powertap is measuring correctly but at least the difference was almost eliminated. I will try w the vectors on the kickr tonight and see if there is any difference.

Anything else I have missed in terms of calibrating the vectors?

Think crank length is set correctly but might need to reset angles? Also, I cannot figure out how to do the dynamic calibration where I am spposed to pedal backwards for some time. I do it but nothing seems to happen.

Thanks.

A

Also, I cannot figure out how to do the dynamic calibration where I am spposed to pedal backwards for some time. I do it but nothing seems to happen.

Thanks.

A

Torqued to 25 Newton Meters...not 35. DC Rainmaker suggests this is the most critical installation step in order to get accurate watt readings.

All that seemed to help and the 2 powermeters were at 152 and 151 watts for the next short test. Now, I do not know if the powertap is measuring correctly but at least the difference was almost eliminated. I will try w the vectors on the kickr tonight and see if there is any difference.

Anything else I have missed in terms of calibrating the vectors?

Think crank length is set correctly but might need to reset angles? Also, I cannot figure out how to do the dynamic calibration where I am spposed to pedal backwards for some time. I do it but nothing seems to happen.

Thanks.

A

I have had a powertap for a while and then also got a set of Vectors (and a Wahoo Kickr...). However, I felt power numbers were off on the vectors so this am i did a comparison riding with the powertap and the vectors. Average power for a couple of minutes: vector 120 watts, pt 150 watts...

Started working on the vectors:
-- rechecked the torque so it is at 35 newton meters
-- did a static calibration
-- took out the batteries

All that seemed to help and the 2 powermeters were at 152 and 151 watts for the next short test. Now, I do not know if the powertap is measuring correctly but at least the difference was almost eliminated. I will try w the vectors on the kickr tonight and see if there is any difference.

Anything else I have missed in terms of calibrating the vectors?

Think crank length is set correctly but might need to reset angles? Also, I cannot figure out how to do the dynamic calibration where I am spposed to pedal backwards for some time. I do it but nothing seems to happen.

Thanks.

A

Per Garmin, the ability to do a dynamic calibration (pedaling backwards) has been removed. I guess now you just do the static calibration and that should do for the whole ride? I liked the ability to re-calibrate while on the ride, always nice to confirm the numbers you are seeing. I don't know why they would have removed that option.

Per Garmin, the ability to do a dynamic calibration (pedaling backwards) has been removed. I guess now you just do the static calibration and that should do for the whole ride? I liked the ability to re-calibrate while on the ride, always nice to confirm the numbers you are seeing. I don't know why they would have removed that option.

And, I've had a pair of pedals for over a year and have had absolutely no issues. Funny.

Damn powermeters, both of them measuring too low :-)

Correct.

The only thing I see missing from the list is that I'd recommend doing a short 2-4 sprints (just 10-20sec is fine), just to settle in. Then pop batteries and re-calibrate. To be clear, this is roughly in line with what you'd do with a Quarq as well (just a bit more settle time). Fwiw, I do these sprints on a trainer, since it's easier to just do all the calibration there in one shot.

I don't have these pedals, but have a friend asking me about calibrating them (v1 garmin vector pedals) since he feels they're reading especially low since the bike swap. He's taken them off one bike and put them on another bike. I see later in this thread that pedaling backwards is no longer required...? Steps for calibrating?

Need to use a torque wrench when installing? torque value?

Related question: on paper, if the bikes have different cranks of the same length but the cranks flex at differing rates, this shouldn't affect the pedals power reading. But in reality, does it?

Thank you, will pass on to the friend.

So say the pedal is attached to a wet noodle and the rider's PE is high as they are trying to put out high power, but the noodle for a crank arm is just preventing the rider from producing as high torque as they were able to produce with a stiff crank arm. Power would read low while PE is high.... ??