Should you do a tilt Cal when you change bikes

[Roadiemark]

Hi

my question is should you do a new tilt cal every time you switch selected bikes even if you have done tilt cals on that bike before.

the reason i ask is that if you look at the rides in the software under "Show Tilt Plot" my line is not straight and at the moment i spend more time on the turbo then on my road bike so i'm switching bikes a lot, not sure if it affecting the ibike dashes accuracy

any thoughts?

mark

[Velocomp]

Yes, you should do a tilt calibration when changing bikes.

[racerfern]

Why not create separate profiles for each road bike. Perform a tilt calibration for each profile and simply switch profiles when necessary.

Also when on the trainer the tilt calibration is not a concern, so if you're switching between one road bike and a trainer you can ignore the tilt calibration. The trainer mode will take care of things.

[Roadiemark]

Hi

thanks for your replies i do have four different profiles which takes care of all my bikes and each one has a tilt cal saved for them but do i need to do a fresh one each time i switch profile or is it saved? for ever until you do another tilt cal

mark

[racerfern]

The tilt is saved as part of the profile and saved until you do another tilt calibration for that profile.

Assuming you're using the correct profile on the correct bike and you have good tilt calibrations you should have relatively flat green lines in the tilt plot.

You can also go into Advanced Setup and actually look at the tilt for each bike. I doubt all the bikes have exactly the same tilt number (but they could).

[Roadiemark]

Hi

did a fresh tilt cal before yesterdays ride and still got the tilt pilot line going up, made sure i had the correct bike selected to i have attached screen shot first tilt cal and then the new one.

what do you think everything is tight no lose parts.

[racerfern]

Increasing or decreasing tilt as you have are generally indicative of changes in barometric conditions. As you can see, the before and after wattage differences are negligible. So I wouldn't be concerned at all. The best way to know if you have a tilt cal problem is to look at the first 5 minutes of the ride. If the tilt plot increases/decreases radically during the first 5 minutes and then attempts to level out that will be the sign that you either chose the wrong profile or need to redo your tilt. Attached are a couple of screenshots of my rides that also have your characteristics. Part of this is due to the topography as you climb, drop, climb, drop, then settle in.

Also note that you're talking about 100-200 ft. over 50 miles; virtually nothing.

Screenshot1 shows the changes that occur due to barometric changes, similar to yours. Screenshot2 shows a need to redo the tilt. The first five minutes increase dramatically.

[Roadiemark]

Thanks racerfern it makes total sense i did start to look at my reading and was coming to the same conclusion but its good to get advice from fellow users with more experiance.

mark