First things first: The gear feature is absolutely awesome. Thank you for implementing this!
Suggestion
Often there are parts of equipment without an actual max distance where it is still desirable to track the mileage on it. This is currently only possible when we set some pseudo max distance. If you would show it in the overview (as number of activities are shown), this would be a massive improvement without a lot of work as the calculation is already there anyway.
Whether this could be enabled in the edit gear view with a checkbox or is just been shown by default doesn't matter.
Examples
Examples for gear where this behavior makes sense could be wheelsets, inline-skates, skis, neoprenes...you name it!
Benefits of this feature
Value tracking of equipment, replacement-tracking, ...
Are there others thinking this feature would make sense?