Where is the frame number on a Transition bike?

1. 01Put the bike somewhere safe and well lit.
2. 02Turn it upside down carefully, or place it in a workstand.
3. 03Look underneath the frame where the cranks meet the bike.
4. 04Wipe away mud, grease or road dirt.
5. 05Use a phone torch if the number is hard to read.
6. 06Take a clear photo before typing the number into a checker.

Make sure you copy the full number. A single missing or misread character can give the wrong result.

Do not use the model name, tyre size, barcode on a shop label, or any number printed on a component. The frame number belongs to the bike frame itself. For example, these are not usually the frame number:

• Transition Sentinel
• Transition Patrol
• Transition Spur
• Transition Smuggler
• Transition Repeater
• Frame size
• Shock serial number
• Fork serial number
• Pivot bearing codes

The number you want is the unique frame code that belongs to the frame itself.

You may need it to:

• ·Check if a Transition bike has been reported stolen.
• ·Register your bike.
• ·Sell your bike with confidence.
• ·Get an accurate bike valuation.
• ·Make an insurance claim.
• ·Report a stolen bike to the police.
• ·Prove the bike is yours.

If you own a Transition, take a photo of the frame number and keep it with your receipt. If the bike is ever stolen, that detail can make a real difference.

• The original receipt or proof of purchase.
• The seller’s name matching the receipt where possible.
• Clear photos of the bike from both sides.
• A photo of the frame number.
• Any service history.
• Details of upgrades or replacement parts.

Red flag. Be careful if the seller refuses to show the frame number, says they cannot find it, gives only a partial code, or pressures you to pay quickly. A genuine seller should understand why you are checking.

1. 01Report the theft to the police.
2. 02Get a crime reference number.
3. 03Add the bike to stolen-bike databases.
4. 04Update any existing bike registration record.
5. 05Contact your insurer if you have cover.
6. 06Watch used bike listings for matching bikes.
7. 07Keep photos, receipts and messages in one place.

Include anything distinctive, such as upgraded wheels, unusual tyres, scratches, stickers, lights, mudguards, racks or replacement parts. The more detail you provide, the easier it is to identify the bike if it appears for sale.

Looking for another brand? See the full bike frame number guide.