For cyclists · Canada-first

Your frame number is
your bike's fingerprint.
Record it now.

Register the serial once and it stays private — the one detail a thief can't repaint, held back until you need it to prove the bike is yours.

Free  ·  serial stored privately  ·  last-seen point rounded to ≥1.5 km

STOLENON-4471
Charcoal Kona Rove gravel bike, stolen

Kona Rove AL — charcoal, drop bars

LAST SEEN · Parkdale, Toronto · Aug 11

Frame serial · on file, masked•••• 4471

Why the serial matters

A repaint changes the colour. The stamped frame number doesn't.

Colour, decals and even the wheels can be swapped in an afternoon. The serial pressed into the bottom bracket is what a thief has to grind off — and almost nobody does. Recorded here, it is the string that settles an argument with a seller, a shop or an officer.

Registries alone

A registry remembers. It doesn't go looking.

529 Garage and Bike Index are good, free, and worth doing today — register there as well as here. They record your bike and help a buyer or a cop check a serial, if someone thinks to look. Nobody is scanning the ads for you, and for now that includes us.

529 Garage free registry

Stops at the registry
Stores your serial and photos. A match needs a human to run a check against it.

Bike Index free registry

Stops at the registry
A searchable record of stolen bikes. Powerful when queried, silent until then.

FoundWall registry + public notice

Puts it where a finder looks
We keep the record, publish a searchable notice against a coarse area, and give whoever finds the bike a private way to reach you — with the serial held back as proof. Sweeping the resale boards is the next thing we're building; it isn't running yet.

Do this before it's gone

Find your frame serial in two minutes.

It's a short string — usually 6 to 10 characters — stamped into the metal. Flip the bike over and read it off the bottom bracket, the round shell where the pedal cranks meet the frame. Photograph it straight-on, in good light, and keep the photo.

01
Bottom bracket first.Underside of the frame between the pedals — the most common spot on road, gravel and mountain bikes.
02
Then the head tube or rear dropout.If the bracket is blank, check the front tube under the handlebars, or the flat tabs where the rear wheel bolts on.
03
Record every character exactly.Zeros vs. O's, I's vs. 1's. A single wrong digit is a serial that won't match a listing.
A bicycle photographed side-on; the frame serial is stamped underneath, on the bottom bracket
STAMPED ON THE BOTTOM BRACKET · SAMPLEWTU • J8 • 4471

What a bike notice looks like.

Illustrative · the live board is at /search

STOLENON-4471
Charcoal gravel bike

Kona Rove AL, charcoal

LAST SEEN · Parkdale · Aug 11

LOSTON-4455
Hybrid commuter bike

Commuter hybrid, black & tan

LAST SEEN · Union GO racks · Aug 12

STOLENON-4438
Gravel bike locked outside

Gravel bike, drop bars

CUT LOCK · The Annex · Aug 08

FOUNDON-4390
A recovered bicycle back with its owner

Trek FX 3 — claimed by its owner

CLOSED BY THE REPORTER · Aug 06

REUNITED

Five minutes now, a real shot later

Put your frame number on the wall.

FOUNDWALL.Canada-first · © 2026