| Forums » Quarq Discussion » Left leg vs. right leg? (3 posts) |
| Left leg vs. right leg? | |
|---|---|
poweredbypoptarts1 year, 7 months ago |
How well does the Quarq work with one legged drills? Can I spin with my left leg (non drive side) and still pick up power? Is there a way to measure with some some software or bike computer which leg is doing more work? I remember the old bottom bracket style meters would only measure the power from one leg and simply multiply it by two to give you a total power reading. -- Boris |
parawolf1 year, 7 months ago |
Quarq measures deformation of the crankset spider. Deformation happens by the application of torque of he crank arm to the spider vs resistance provided by the chain which is attached to and varied by the gearing. As a result pedaling non-drive side only will produce a power result, because the torque of the NDS crank arm is transmitted through the bottom bracket spline to the spider on the drive side and resisted by the chain+appropriate gearing. Since the CinQo doesn't know where in the pedal rotation you are, it cannot differentiate in power generated by NDS or DS, it just reports a positive result. Old bottom bracket style meters were inaccurate because the DS never transmitted power to the bottom bracket. The bottom bracket is there on the DS to provide location and support to the crankarm/spider/rings. Pedaling applied on the DS is directly transmitted to the spider to the rings and the result is output. Only pedaling on the NDS is shuffled through the bottom bracket and thus measured. |
poweredbypoptarts1 year, 6 months ago |
Wow! That's a very detailed answer. I'll take that as a yes. Thanks! :-) -- Boris |
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