Some bicycles have multiple serial numbers...so if I'm trying to check to see on-line if a bike is stolen (I work in a bicycle shop) I don't know how to enter multiple numbers

You already posted what kind it is in the previous question - "Haro bicycle F2 freestyle series." An average is a single number, a range is two numbers, so there's no such thing as an average range. Nobody here can give you info based on a serial number. I already gave you a way to research what year you have, but year is not terribly important for value. You can also try this site to look at specs for different years of the F2 in order to determine what year yours is: http://knowyourbike.com/haro/f2
Price depends on mechanical and physical condition, the size of your city/town, and the desirability of the particular bike, thus can vary by a huge amount, so an average price is useless. Research, decide on a price, advertise on Craigslist or bulletin boards, and if nobody bites then the price is too high.

I’m happy to help further over the phone at https://www.6ya.com/expert/donald_f2ed37026a3ac881

A number that short is more likely a date code than a serial number, but you are going to have to find a site that deals with Firestone bikes to have a shot at ID'ing the bike. Alternatively, Google Firestone bicycle and look at images in the results. Find any that look like yours and click on the Web Page link to find out year, approx. value, etc. Note that Firestone was never a bike manufacturer, so the bikes so labeled were made by various manufacturers over the years, and each had a different serial number scheme.

I’m happy to help further over the phone at https://www.6ya.com/expert/donald_f2ed37026a3ac881

There is no single "good site." Google search stolen bike and you will find numerous sites. No way to predict if the owner of a bike will report the theft or which site they will pick. That being said, here's one specific one to try: BikePedia

I’m happy to help further over the phone at https://www.6ya.com/expert/donald_f2ed37026a3ac881

contact the police
and check for reports to see if
the bicycle was ever stolen
write down its serial number
if serial number has been scratched out or missing
good chance the bike was stolen at some time

serial numbers on bikes are usually between the cranks on the flip side


this model was recalled for faulty brakes
http://www.usatoday.com/story/money/business/2015/04/21/trek-bicycle-recall/26149227

if you find a shop selling them they should know the year by the serial number or the paint job on the bike, they even might have a catalogue with your bike pictured.

take the serial to the cops to see if stolen

check with your local Police or Fire department. There isn't a national bicycle serial number registry. Only if the previous owner actually registered it with the local Police or Fire dept will there be a way to check if it is stolen. Police regularly have auctions of lots of bicycles that have been recovered but have gone unclaimed because the owners never registered them.

Sorry, comprehensive databases for bicycle serial numbers do not exist.

TREK bicycles have the serial number on the underside of the down tube near the crankset. Flip your bike so that the wheels are up and look at the tube near the pedals (on the tube that runs towards the handlebars).

Many TREK manuals are available here: http://www.bike-manual.com/brands/trek/om/welcome/index.htm. You can find a good picture of the parts of the bicycle and their names in the manual.

Some other brands of bicycles have their serial numbers on the seat tube near the crankset.

I hope this helps.

Cindy Wells

Usually there will be a bike shop sticker on it, if so, call them and they can tell you who owns the bike by the serial number. No sticker, check the phone book and find out what shops sell that brand. (At least, that is how we do it, we save every serial number for our customers and sometimes we know the bike was stolen before our customer because the police call us). If there is no sticker, call the police dept and ask if someone has reported one missing or look in the paper. Other than that, I don't know of any more ideas.