This online resource library can answer most of the questions you might have. The library offers manuals, photos, videos and other useful information to help solve your issues and is organized by topic for quick referencing.
Simply select a category from the list on the lower right column. You can see the subcategories if you click on the arrows to the right of your category.
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 area from the impressions made by the stamp.
To find the number, here are a few different locations you can look.
stem earliest P-series
bottom bracket 2008 – 2009
latch plate 2009 onward
FYI- locations of other Bike Friday models frame numbers
bottom bracket 1997 onward
rear dropout pre 1997 469-1993, F520 diamond frame
bottom bracket shell between cranks (front or rear) all