Had my quarq for 4 weeks now and everythings been great. Love the quarq. Today, during my long ride, I got an hour into it and my power started going all crazy. For what I was certain was a 250-275 watt effort, I was seeing numbers varying from 700-1200 watts (maybe I was just feeling really strong today?). I zeroed by backpedaling 4 times and things would appear to be normal for all of 30 seconds. Finally stopped and did a manual zero and it didnt seem to help. Once home I removed the quarq and just gave it a once over. Double checked my magnet, etc. I, unfortunately, do not have a torque wrench but had read that crazy readings such as what I was seeing could be caused by the chainring bolts not being torqued appropriately or because they were loose. Since I dont have a torque wrench, I just inserted 5mm hex wrench into each bolt and two of them were so loose that I could tighten them with minimal effort. I tightened them down to what I feel is an adequate amount (I just bought a torque wrench online…should have done this way earlier).
My question is, why would chainring bolts just work themselves loose like that? And, can anyone confirm that is why I was seeing the crazy readings? I mean, I have to assume that having proper torque on those bolts is pertinent to obtaining appropriate power readings.
My question is, why would chainring bolts just work themselves loose like that? And, can anyone confirm that is why I was seeing the crazy readings? I mean, I have to assume that having proper torque on those bolts is pertinent to obtaining appropriate power readings.
Had my quarq for 4 weeks now and everythings been great. Love the quarq. Today, during my long ride, I got an hour into it and my power started going all crazy. For what I was certain was a 250-275 watt effort, I was seeing numbers varying from 700-1200 watts (maybe I was just feeling really strong today?). I zeroed by backpedaling 4 times and things would appear to be normal for all of 30 seconds. Finally stopped and did a manual zero and it didnt seem to help. Once home I removed the quarq and just gave it a once over. Double checked my magnet, etc. I, unfortunately, do not have a torque wrench but had read that crazy readings such as what I was seeing could be caused by the chainring bolts not being torqued appropriately or because they were loose. Since I dont have a torque wrench, I just inserted 5mm hex wrench into each bolt and two of them were so loose that I could tighten them with minimal effort. I tightened them down to what I feel is an adequate amount (I just bought a torque wrench online…should have done this way earlier).
My question is, why would chainring bolts just work themselves loose like that? And, can anyone confirm that is why I was seeing the crazy readings? I mean, I have to assume that having proper torque on those bolts is pertinent to obtaining appropriate power readings.
Is the new battery suggestion just as an added precaution?
Yeah…IME, if you start getting wildly “off” power readings, the most common issue is low battery voltage. It’s a fairly simple and relatively inexpensive thing to try first.
My owner’s manual says 10 N-m for steel. Has the manufacturer revised these numbers?
I was recently sent a prototype CinQo to test and did not only a chainring swap, but a spider swap as well. Those torque values I stated above are what I remember reading on the swap instructions…I’ll double check them when I go home for lunch.
We use 12 Nm for steel bolts and 10 Nm for alloy bolts when first assembling the rings to the CinQos. However, we recommend 10 Nm for steel and 8 Nm for alloy in our manual as well as when customers ask us because you risk “mushrooming” the bolts if you re-torque them too many times at 12 Nm.
We use 12 Nm for steel bolts and 10 Nm for alloy bolts when first assembling the rings to the CinQos. However, we recommend 10 Nm for steel and 8 Nm for alloy in our manual as well as when customers ask us because you risk “mushrooming” the bolts if you re-torque them too many times at 12 Nm.
