Tracking the mileage of your shoes and bike

In short

• Your gear is on Profile, under Gear.
• Set a shoe as your default for running, and every run where nobody picked anything counts towards that shoe on its own.
• You get one message in Messages for each state, and tapping the message opens the shoe or part.
• Tubeless sealant dries out with time, not with kilometres.

1.Your shoe rack and your bike garage

Your gear is on Profile, under Gear. Your shoes are shown as a rack: each pair in the colour of its state, with the kilometres and a bar up to the limit. Your bikes are in a garage, and each bike shows its parts in the colour of their state.

Tap a bike and its garage page opens. It shows your bike from the side with the chain, the cassette, the chainrings, the tyres and, on each wheel, the inner tube or the sealant. Below the drawing each part has its own row with its kilometres and a Replace button. A bike also counts your riding time in hours.

A legend below the list shows which colour goes with which state.

2.Where the kilometres come from

The kilometres come from your activities in Trimetra: what your watch or app sends, and what you record or enter yourself.

You do not have to pick a shoe for every run. Set a shoe as your default for running, and every run where nobody picked anything counts towards that shoe on its own. Walking and cycling work the same way. If you pick a different shoe or bike for a session, it counts there. A shoe or bike you picked for an activity in Strava also comes before your default.

With Strava connected, the shoe or bike from your Strava activities comes along. Under From Strava you find your shoes and bikes from Strava. Add these puts them in your list with the kilometres Strava already counted, and Enter it myself adds them without those kilometres. If they are not there, reconnect Strava and all your shoes and bikes come along.

In the detail of a completed session, the Session card has a row with the shoe or bike, its state and who picked it: you, Strava or your default. If you want a different one, edit the session and pick your shoe or bike there.

3.How to start

Under Gear, tap Add shoe or Add bike. First you only give a name and the type: a running or walking shoe, or a road bike, gravel bike, mountain bike, time trial bike, city bike or e-bike.

After you save, the detail opens. There you can add the purchase date and the shop, and a photo of your receipt that only you can see. If you have already run in this shoe, enter how many kilometres it has under Starting distance.

You add parts on the garage page of your bike, with Add part at the bottom of the list. You pick the kind, and the part gets the limit that goes with that kind.

4.When something is due for replacement

When you get close to the limit, the shoe or part says nearly due for replacement. At the limit it says due for replacement. You get one message in Messages for each state, and tapping the message opens the shoe or part.

Fitted a new chain? Tap Replace. The old one is retired and the new one starts at zero. For a shoe you no longer use, tap Retire.

Tubeless sealant dries out with time, not with kilometres. For sealant Trimetra counts the days since you topped it up, and the message says the top-up is nearly due or due. After topping up you tap Topped up, and the count starts again.

5.The limits Trimetra suggests

A shoe gets a limit of 700 km. If you use a shoe for races and not for easy runs, it is 400 km.

For the parts of your bike these are the limits. Chain 3,000 km, cassette 10,000 km and chainrings 20,000 km. Rear tyre 4,000 km and front tyre 6,000 km. Brake pads 3,000 km and brake rotors 15,000 km. A service is set at 100 hours of riding time and sealant at 90 days. An inner tube has no limit; you see how long and how far it has been in.

You change any limit yourself in the detail, at Replace at, with the minus and plus buttons. If you ride a lot in the rain or measure your chain with a chain checker, set the limit where it fits for you.

6.Why these numbers

They are averages, and how fast something wears depends on your weight, the weather, the surface and the upkeep. A chain stretches with the kilometres, and a stretched chain wears the teeth of your cassette and chainrings faster. That is why the chain is set low and the cassette and chainrings higher. The rear tyre carries more weight and drives the bike, so it wears faster than the front. According to the maker, tubeless sealant stays liquid for two to six months, and they advise checking it every quarter. In a running shoe the cushioning drops with the kilometres. In a machine test, shoes kept less than 60 percent of their cushioning after 400 to 800 km, and in real runners it was about 70 percent after 800 km. Whether a worn shoe puts more strain on your tendons and leads to injury has not been firmly shown. In one study, runners who alternated between more than one pair did get injured less often.

7.Sources

Cook S.D. e.a. (1985). Shock absorption characteristics of running shoes. Am J Sports Med 13(4): 248–253.

Malisoux L. e.a. (2015). Can parallel use of different running shoes decrease running-related injury risk? Scand J Med Sci Sports 25(1): 110–115.

Stan’s NoTubes. Sealant support (stans.com, geraadpleegd 30-10-2026).

Frequently asked questions

In the app

Further reading

Trimetra adds the kilometres of your shoes and your bike with every session, and tells you when something is due for replacement.