Register your Bike Friday

Your New Bike Friday comes with a Limited 10 Year Warranty.

Jump to the warranty registration form

warranty sticker

You should have a sticker like this on your new Bike Friday with a hand written Frame number. The “serial number” and “frame number” are the same thing. The number on the sticker should match the number on your bike.

If you don’t have a sticker you should be able to locate your frame # on the bike in the following locations:

Depending on the age of your bike, it will be in one of two places. Bikes built before mid-1999 will have the frame number stamped on the drive side dropout. It should be located between the nut for the rear hub, and above the rear derailleur. You may need to remove the wheel to see it clearly.

If you have a newer bike, the frame number should be located on the underside of the bottom bracket shell. Turning your bike over should make the frame number apparent.

If you have a tandem, the same rules apply as the single bikes. We currently stamp the front bottom bracket shell.

Older models no longer made- For Sat R Day recumbents, the frame number on newer units is stamped on the top side of the jackshaft spindle housing, found below the seat.

To register your Bike Friday and receive the full warranty and 10-year guarantee on your Bike Friday frame,  fill out the form at the bottom of the page.  The 10-year warranty on the frame is only valid if you purchase from an Authorized Bike Friday Dealer or directly from the factory in Eugene, Oregon, USA.

Registration is important. It will keep you up to date on your bike or in the event of a recall, we will be able to contact you.

Registering 3rd party purchases will connect your Bike Friday to you and will also put you on the email list for recall or update purposes.  You will receive monthly newsletters informing you of periodic sales and travel stories from Bike Friday users like you! If you don’t want to receive them you can always opt out.

Additional Info

*Warranty is valid under normal wear and tear conditions, no modifications or drilling into the frame can be done other than by an authorized dealer or the factory.

“What if I can’t find/read my frame number?”


We first stamp the frame number into the frame of your bike, then powder coat. Sometimes the powder fills in the numbers thus making it hard to read.

As for finding the location of your frame number, We moved them a few times over the years. Keeps the thieves guessing!


To read the number we have a couple of suggestions.

1. You can take a flashlight and hold it at an angle over the number, this will create shadows in the peaks and valleys which should help view it better.

2. If the powder coat is too heavy, you can with sandpaper, sand down the area where the numbers are. Then you should be able to read it. BUT you must protect the bare metal from rusting. We suggest a good quality clear nail polish. Be sure to coat the entire area thoroughly.

3. Alternatively, you can take a piece of paper and a pencil and place the paper over the serial number and gently run the pencil over the area, covering the area up in pencil marks.  This “Sherlock Holmes” technique will often faintly display the serial # in the sketched over the area from the impressions made by the stamp.

Bike Friday will never share your contact information with a third party.

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