Is there an way to read the default bike out of the profile?

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John Sievert

• October 17, 2026 20:37

I quit using the Karoo several years ago because I couldn't use ActivityFix to set the strava gear_id using sensor names.  Now, as a look at the Karoo again, I see that the profile specifies a default bike but you can't pick that up in the fit file or from the json after the ride ends.  Why is this not available or am I missing something?

I'm willing to write an extension to make this work but this seems like a crazy omission to me

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  Zalvato

  • October 21, 2026 11:31

  Hi John,

  you're not missing anything – I ran into the same wall while building my extension (WaxLog). As of karoo-ext 1.1.9, an extension's RideProfile only has id, name, pages, indoor, defaultActivityType and routingPreference – no bike. The Bikes event gives you the Karoo bikes (id, name, odometer), but nothing links a profile to its default bike.

  Two workarounds I know of:
  • Map profiles to bikes inside the extension – the user links each ride profile to a bike once. That's what WaxLog does; the catch is one profile per bike.
  • Compare each bike's odometer before and after a ride – the one that grew should be the bike that was ridden. I haven't verified yet when exactly the Karoo updates the odometer, so treat that one as an idea, not a recipe.

  An official field for the profile's default bike would make all of this much simpler.

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