203 replies to this topic Post Order

[Minion]

capeofstorms, on 03 May 2012 - 09:08 , said:

hi,

Was jus reading this thread and I'm not inspired by the amount of drift in the quarq. Is this a common experience among those of you that use a quarq and is it an annoyance

http://www.quarq.com/forum/thread/286/

Mine drifted from about -120 to about -380 over the first week of riding. It's now been stable at around -380 for around 8 months. It looks like they need a bit of bedding in over the first couple of rides.

Edit: During a ride, the drift is within 20pts or so from start to finish. Most of that seems to occur in the first 15min of riding (possibly acclimatisation).

Edited by Minion, 03 May 2012 - 12:12 .

[Puncheur]

Minion, on 03 May 2012 - 10:10 , said:

Mine drifted from about -120 to about -380 over the first week of riding. It's now been stable at around -380 for around 8 months. It looks like they need a bit of bedding in over the first couple of rides.

Edit: During ride, the drift is within 20pts or so from start to finish. Most of that seems to occur in the first 15min of riding (possibly acclimatisation).

Much better review.
Thanx, minion.

[Spinnekop]

That drifting.......Torquing the chain rings correctly is of UTMOST importance.
I had a huge drift -380......did the torque at 10nm and it shifted to -100

It will differ from day to day and is influenced a lot by temperature.

With the quarq you just pedal backward 4 times and it zeros again. Something I do every now and again in a ride, especially if I started in the cold early hours of the day.....

[Puncheur]

Spinnekop, on 03 May 2012 - 12:41 , said:

That drifting.......Torquing the chain rings correctly is of UTMOST importance.
I had a huge drift -380......did the torque at 10nm and it shifted to -100

It will differ from day to day and is influenced a lot by temperature.

With the quarq you just pedal backward 4 times and it zeros again. Something I do every now and again in a ride, especially if I started in the cold early hours of the day.....

Very interesting...

[Minion]

Puncheur, on 03 May 2012 - 12:49 , said:

Very interesting...

Every single strain gauge-based power meter will be affected by temperature because of the way the technology works. Provided you zero beforehand and the PM temperature doesn't vary significantly during the ride, it will not have a significant effect on the power readings.

[DangerDave]

a nice function of the Power Tap is that it will auto zero, every time you free wheel for longer than 30sec and there is no power recorded it will auto zero.


I think this is the only PM to do so.


A manual check of the calibration can also be done and anything between the values of 500-530 is considered acceptable. New values are 512.


A manual zero can also be done as what is done with SRM

[Zac.A]

DangerDave, on 04 May 2012 - 04:04 , said:

a nice function of the Power Tap is that it will auto zero, every time you free wheel for longer than 30sec and there is no power recorded it will auto zero.


I think this is the only PM to do so.


A manual check of the calibration can also be done and anything between the values of 500-530 is considered acceptable. New values are 512.


A manual zero can also be done as what is done with SRM

Power2Max auto zero's after 3 seconds with no recorded power/cadence.

[Zac.A]

I may have a powertap elite+ built into a DT Swiss RR465 up for sale soon, will let you guys know.

[Zac.A]

Look Keo Polar Power pedal is out.

When I looked there were 4 in stock, probably going fast...

http://www.wiggle.co...paign=lookpower

[LOOK695]

For those interested, DC Rainmaker has written a review on the SRAM RED 2012 Quarq power meter

[capeofstorms]

Based on the above article from DCRainmaker it appears unless you have the newer SRAM groupset, from a money perspective the SRAM power crank does not make sense, unless you want to fork out for a set of STI's and front deraileur as well

Edited by capeofstorms, 17 May 2012 - 02:57 .

[Tarmac's Revenge]

It's not all bad news: http://velonews.comp...tibility_209270

There is still a full list of compatibility and most drawbacks are effected in the 39/11, which you should not be using anyway