Power??

KevinA

Hi Guys

Now this might be a very stupid question but its something that has been bugging me the last few rides.

I recently got a ceramic bottom bracket put in my Cervelo as well as upgrade to Ultegra DI2 and I have noticed that my rides have been slightly faster but my power has been way down (Measured using Garmin Vector 2 Pedals)

I decided to do a 34k loop today which includes a steady climb and not much interaction with traffic so traffic, lights wouldn't be a factor.

Todays ride my numbers were;

33.96km
123 W Weighted Average Power
25.5km/h average Speed
1:19.50 Time

Previous Ride was

34.39km
198 W Weighted Average Power
25.6 km.h Average Speed
1:20.36 Time

The bike is the same except the above changes, my weight is roughly the same but my power is quite a lot less than the previous ride.

Time is roughly the same, average speed was roughly the same. Weather conditions were roughly the same.

How come I am doing my rides in less time but power is way down?


Thanks

gethinceri

What was the normalised power for each?

KevinA

148 previous ride
98 tonight

maryka

Powermeter definitely underreading now. Never had Vectors so no idea why, did you swap them into a new crankset I guess and not calibrate/tighten them properly or something?

KevinA

Yes, but the mechanic done it

I calibrated

Not going to worry too much as I am waiting on powertap pedals.

Thanks though, I knew something was up

cycleclinic

Likely to be tightening torque.

KevinA

Thanks, will go and check and give it a tighten

Knew my average the over day was down as I was 90k and 89 watts and knew I had pushed myself harder than that