AeroPod, PowerPod and Newton

I was going to ask the same thing. Also, I was wondering if it would be possible to calculate changing crr if you have DFPM. I have several MTB routes with sections that can change from hard as tarmac one day to energy sapping mud another. As I don't go very fast on my MTB and much of the route is ...

I sometimes get "messed up" Heartrate recordings up to 200+ bpm usually when going downhill. It's really annoying. By the way, that is a common problem especially on cooler, less humid days. Your jersey is flapping in the wind and building up just enough static electricity to interfere wi...

cure wrote:Is it safe to ride out of the saddle if it’s a fixed roller, like it doesn’t move back and forth.

I've never ridden rollers, but I did watch this video once: http://www.youtube.com/watch?v=wME5NTriTco

Can anyone else help?

travis, thanks for the reply, i will try this out! i got the rollers and there are 3 rolls. on front for front wheel to sit on. and 2 in the back for rear wheel. there is a black rubber band that wraps around front and middle rolls, like a pulley action. will i have issues if its like that? Nope, t...

HI velobob, There's a newer version of the SiLabs USB driver that you might not have. Try this and see if it helps: http://www.ibikesports.com/iBike_update/SiLabsUSBDriverDisk_2_9.dmg.zip Otherwise, it might be worth trying to manually uninstall the NI Visa Runtime driver and reinstall from scratch....

Fernando, Great stuff. Thanks for jumping in. Geoff, it would really help if you can post that *.ibcd4m file that Fernando described. If you already deleted the data from the iBike, you can still find the file in a folder called "calibration rides" in your ride files folder. (It automatica...

Hi cure, I've searched again, but still can't find any power curve data for these rollers. If Nashbar ever releases the data, we will be happy to include it our software. But not all is lost. Fortunately, the resistance of the rollers is linear, unless the rollers have a pulley to drive a fan or fly...

has anybody experienced this? is this because of the change in air density due to the change in temperature? ex. from 26degC to 30deg C It is due to the effect temperature has on the sensor & amplifier rather than its effect on air density. We are getting everything we can out of the wind senso...

5.1.3 is available.

Travis

cjonbike wrote:Just out of curiosity!
Will my Power numbers now be the same?

As long as the route analysis adjusts the wind, then the answer is yes. I.e., there is an O&B, or laps, or the ride ends were it begins, and there is no drafting.

I found the bug causing this problem. I'll get a new version out in the next day or two to fix it. Fortunately it is just a display issue for the graph and the underlying data is fine. Until I get the new build released, you can set the bottom axis to "time" rather than "distance"...

Any chance of getting JetBlack Z1 Fluid Trainer added, i have looked on their site and i have only been able to find the image on the attached link http://jetblackcycling.com/aus/products-page/fluid-trainers/ Ok, this trainer has been added. In the iBike SW menu, select "Help -> Check Online f...

We've found that 0.0055 is good for a typical blend or roads. Chip seal would be worse. And if you've got a silky tarmac to ride on, it would be lower. Remember you always have the option of measuring the Crr by doing a set of coast-downs together with a calibration ride. After you do them, connect ...

The fric number factors in the riding tilt also, so they are fine. The number to look at is Crr. You have the same rolling resistance of 0.055 for both bikes, which is probably good. Don't try to compare fric numbers.

Travis

I did find a bug that would cause the dialog asking for DFPM unnecessarily. It will be in the next build. Also, I've changed the dialog so that you can tell it you don't have a DFPM.

Travis

Travis - Perhaps when something like this shows up - would it not be useful to have a short explanation of how you get these values to plug in - it just leaves it as an open item - I am sure the is a coefficient function that is associated with the reistance models... Tom Kreitler published an Exce...

still-chasing wrote:Thanks! I just saw on Kreitler's page their watt result is from a 160 lbs rider. I weigh 138 lbs. Do you have an idea how much to tweak it by? Thanks again.

Subtract 1.06 from whatever you have for B
If you happen to be using the trackstand option, subtract 0.67 instead.

The manufacture data for the Kreitler rollers is good, but they didn't include the effect of rider weight. If your weight is significantly higher than the person Kreitler used to make there table, then you will have more rolling resistance and vice versa. Tire make & model can also make a small ...

Sorry that it wasn't clear, but the focus of this Wizard is to make things easy for first-time customers. The idea is that they can enter as much information as possible while sitting at the computer and then follow the steps in the video to do the rest on the bike. By following the steps, hopefully...

Did you go over bridges? Look to see if the mapping sites are following the profile of the bridges or whatever is underneath them. Sometimes if the GPS accuracy is low as you go over the bridge, the web sites that are based on elevation surveys think that you rode down to the bottom of the ravine/re...

If your system still has an older version of one of the com drivers, NI-VISA, after you upgrade to Lion you might see a system error. Simply upgrade to this latest version of the the driver found here: http://www.ibikesports.com/iBike_update/NIVisaRuntime_mac.zip If you have not upgraded to the late...

Mac users upgrading to Lion need to install the latest NI-VISA driver: http://www.ibikesports.com/iBike_update ... me_mac.zip

Travis

Hi, I have a Gen III and I have loaded the latest version of all the software. Unfortunately, no matter what I do the Device menu item is disabled. I have even tried changing the COM port. I would greatly appreciate any help that can be provided on this. Thanks. The Device menu gets disabled if you...

If there are more than 1 cal rides stored in the unit, then they should both be available in the 4 Mile Ride list, which is the old name for a Calibration Ride. (I've changed the name to Calibration Ride for the next build of the iBike SW to avoid confusion.) So if your second ride is not available ...

Just wanted to check and see when or if they had the fix for hill re-peats where the numbers are low when starting a second or third hill repeat after having come down the hill. This is most noticeable on hill climbs of more than 10 min or so. I know Travis had mentioned he had a fix for the algori...

As Nik mentioned, the rollers that we support are the models where the manufacturer has supplied formulas for calculating the resistance curve, which we don't have from Nashbar.

Travis

Gear ratio is simply (# of ring teeth)/(# of cassette teeth). For example, my highest gear is 53/12 = 4.42 and my lowest gear is 39/25 = 1.56. It is calculated based on the speed and cadence data and it is simply a measure of how many revolutions of the wheel you get for each revolution of the crank.

Thanks for trying it out. I didn't hear of any problems so I cut 5.0.1 loose a while ago. People should start seeing the update alert.

Travis

The send to Google Earth feature will work fine on most computers, but the way it works there will probably always be a handful of machines that have trouble with it including the OP. I will make a build in the near future that will give you the option of saving the KML file (i.e., a Google Earth fi...

I have a new build of the iBike SW available, but I have made a big change to the Mac installer and need some folks to test it out to make sure there aren't any unforseen issues. I've changed it from being a PKG type installation to the easier method of "drag into the Applications folder" ...