Powertap Computer Issues

I have no idea what the true reader base of my blog is or how “powerful” it is.  I know I get about 50 unique visitors per day, so I thought I would the word about an issue I’ve been having with my Cycleops Cervo computer – aka Little Yellow Computer (LYC).

Mine is running firmware 7.6, and while on the bike all the metrics I watch: Power, Cadence, Time all display correctly.  Distance is wildly off and I have to use a crazy rollout (2033 for a 2096) wheel to get distance to measure close to accurately.

The bigger issue becomes appearant when you download.  Once downloaded into WKO+ or Poweragent, it inflates the actual ride time by about 1 mintue per hour.  As the ride get’s longer, the inflation get’s bigger.  1 minute for a 1 hour ride, but 7 to 8 minutes for a 5.5 hour ride.

The issue is definately within the LYC – you can verify this by looking at the average speed displayed on the computer itself.  If you take the distance and divide it by the time, you can an average speed that does not match the average speed displayed.  BUT if you take the distance and divide it by the “inflated” time – you get the displayed average.

Confused yet?

The Joule does not display this issue.

I’ve detailed a lot of my tests in the following thread on slowtwitch: Powertap LYC Issues Thread.

If you have issues similar to this, please contact Saris and make noise.  If they give you crazy talk – please leave a comment or use the contact page to give me your contact info, and I’ll periodically update my contact at Saris with people who are having the issue and/or an impression of people impacted!!!