What is watchmy.bike?
watchmy.bike is a cycling gear tracking and showcase platform that watches every component on every bike you own, across the full life of each part. It logs the distance on your chain, cassette, brake pads, tires, and drivetrain separately from the bike's odometer, then tells you when something is due for service. Strava is supported but optional. Connect it and your rides log distance automatically, or skip it and enter distance by hand.
The site is built and run by Marien van Os, a developer with 25-plus years of experience and a road, gravel, and mountain cyclist since 2008. He uses it daily on his own bikes and keeps a public collection on the site.
Key Features
Component wear tracking
Every part gets its own distance counter. Chains, cassettes, brake pads, tires, wheels, forks, frames, handlebars, saddles, and 20-plus other part types are tracked independently, so you know the real mileage on a chain even after you swap it between bikes.
Maintenance alerts and service intervals
watchmy.bike sends distance- and time-based alerts when a component hits its wear threshold or a service is due. Free accounts get email alerts and up to 5 service intervals. Paid tiers unlock unlimited intervals plus control over alert frequency, threshold, and cooldown, with per-component notification toggles.
Public showcase pages
Each bike gets a public profile at a custom URL, with a photo gallery and the full component spec laid out for anyone to see. Builds also show up in a community directory, so you can browse other people's setups and share your own.
MCP server for AI assistants
This is the nerdy part. watchmy.bike ships a Model Context Protocol server, so you can point Claude, ChatGPT, or Gemini at your bike data and ask questions in plain language. You can also paste a spec sheet and have it bulk-add components instead of typing each one in.
Cost tracking
Log what you paid for each part and the app works out cost per kilometer, so you can see which components are actually worth the money over time. Cost tracking is included on every tier, free included.
Who it's for
watchmy.bike fits cyclists who own more than one bike, run components hard enough to care about wear, and would rather get a heads-up before a chain wrecks a cassette than find out the expensive way. The N+1 crowd, basically. If you like keeping a clean record of your gear and showing it off, the public pages and component history are the draw. If you like poking at your own data with an AI assistant, the MCP server is a reason on its own.
