power output question

Taxuser1

The Garmin vector pedals for measuring power output are on my radar.

At present though i'm only thinking of the single pedal option which is on the non drive left side. My issue is that following a bad injury a few years back, I have less than 40% left-hamstring uplift on a pedal stroke.

my question is whether this would lead to a skewed power calculation overall as i overcompensate with my right leg and the downstroke of the left leg.

I suppose the question in really whether the garmin pedal as such is made for only athletes of equal limb quality and control - i haven't found answers to this on their site and I await their email response. would getting just one pedal be a waste.

Lumen

You don't need accuracy, only consistency.

tunney

Lumen wrote: »

You don't need accuracy, only consistency.

Ah Lumen...............

AstraMonti

But isn't he actually right? As long as the pm is consistent, why does matter if the 100watt is actually 60 or 140?

thekooman

do a 20 min FTP test (or a 16k TT at what you think if your hardest) when you get the pedal setup, i.e. torque'd at 34-40 Nm. base your training off that.

godtabh

Lumen wrote: »

You don't need accuracy, only consistency.

only if you are comparing who has the biggest eh ............ wattage

Taxuser1

thekooman wrote: »

do a 20 min FTP test (or a 16k TT at what you think if your hardest) when you get the pedal setup, i.e. torque'd at 34-40 Nm. base your training off that.

you'll need to explain the last bit "torqued at 34/40 NM" please?

tunney

godtabh wrote: »

only if you are comparing who has the biggest eh ............ wattage

Still don't get it do you?

Plenty of threads on this. Expected more from Lumen, not so you.

Anyways.........

godtabh

Taxuser1 wrote: »

you'll need to explain the last bit "torqued at 34/40 NM" please?

The pedals need to be correctly installed or the give dodgy readings

Chips Lovell

The issue is indeed consistency. If there is an imbalance, a one-leg only powermeter is only useful if the imbalance remains the same across the entire range of power output and across the entire fatigue profile, i.e. if its the same at the beginning of the ride as it is at the end.

Arthurdaly

I've got the set of pedals and the Torque wrench is essential to ensure you are getting accurate readings if you move them between bikes. I move them between two road bikes/TT bike and can only have confidence in the consistency of the numbers when using a tourqe wrench. This is particularly important for pacing in TT's or longer climbs.

On the question of one sided, I guess consistency is most important and you may get that through one pedal but I paid that bit extra to get total accuracy.