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09-08.-2007, 03:14 AM
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#1 |
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Registered User
Join Date: Feb 2007
Posts: 66
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PT Zero Torque & Temp
Hi,
It's a hot summer where I am - upto 45 deg C / 113 deg F so I'm alternating between outdoor and indoor riding. It seems when I go from a zeroed torque indoors on the Powertap (20 deg C/ 68 deg F) to outdoors it can take about 5 zero procedures to get the power right (it's too high initally) and similarly the same the other way (too low and see lots of -0). Is it normal to take a few zero procedures with such extreme temperature changes? |
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09-08.-2007, 04:44 AM
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#2 | |
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Registered User
Join Date: Jan 2005
Location: Northern California
Posts: 594
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Re: PT Zero Torque & Temp
Quote:
How much time between zero procedures - are you doing it right after you go outside? |
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09-08.-2007, 01:44 PM
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#3 |
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Registered User
Join Date: Jan 2004
Location: Pittsburgh, USA
Posts: 189
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Re: PT Zero Torque & Temp
I'm not sure how normal it is, but it's not surprising with such a big temp change.
If possible, leave the bike, or at least the wheel, out to adjust for a half hour. If you have the auto-zero turned on, it should adjust automatically if you coast periodically. Just keep in mind that it won't auto-zero if it's off by more than 7 in-lbs, so definitely manually zero before you start. |
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