Is mileage enough to know when to replace your bike components?

The chain checker is essential

Let's say it upfront: the 2-euro chain checker is still the best tool to measure chain wear. It measures the actual stretch between links, and no app can replace that physical measurement.

It's a fact. 1,000 km at 100 watts on flat roads is not the same as 1,000 km at 400 watts in the mountains. Rider weight, weather, cleaning habits: everything affects how fast a chain wears.

So why track mileage if the checker does the job?

The real problem isn't precision — it's forgetting

Let's be honest: who actually pulls out their chain checker regularly? You tell yourself you'll check this weekend, and then 2,000 km later you remember — when the cassette is already toast.

Mileage isn't a perfect measurement. It's a reminder. And an approximate reminder that shows up on time beats a perfect measurement you never take.

Mileage tracking doesn't replace the checker. It reminds you to use it.

And for everything else, there is no checker

The chain is the easy case. There's a cheap, simple tool to measure it. But what about the rest?

• Brake pads: no universal tester, you wait until braking feels off
• Tyres: you ride them until that suspicious first puncture
• Cables and housing: you swap them when the derailleur refuses to shift
• Bearings: you wait for the noise
• Cassette: you replace it when the new chain skips

The cost of forgetting

A worn chain that stays on too long takes an 80-euro cassette with it. Ignored brake pads scratch the rotor. A derailleur cable that snaps mid-ride ruins your day.

The real cost of bike maintenance isn't the price of parts. It's the price of the parts you damage by forgetting to replace wear items on time.

Average lifespans are well known. A road chain lasts 3,000 to 5,000 km. Brake pads, 2,000 to 4,000 km. Road tyres, 5,000 to 8,000 km. These aren't exact numbers for your riding, but they're more than enough to trigger a visual check at the right time.

The winning combo: km + checker + common sense

The point isn't to replace one tool with another. It's to combine both.

Mileage tracking tells you: "Hey, your chain has done 3,500 km, maybe time to pull out the checker." The checker tells you: "Yep, it's at 0.75, time to swap."

And for brake pads, tyres, cables? Mileage is your only safety net. Without it, you're riding blind until the first problem hits.

Automate the tracking

That's exactly what ChainLog does. It connects to Strava, imports your mileage automatically, and alerts you when a component is approaching its lifespan.

You don't have to log anything manually: km update after every ride. And when you replace a component, you log it (or snap a photo of the receipt) and the counter resets.

It's not a measurement tool. It's a memory tool. And for bike maintenance, that's usually what's missing.