What Year is My Surly and How Do I Read My Bike’s Serial Number?
Here at Surly HQ, all sorts of questions land in our inbox. From time to time, we review them and catch a whiff of something worth exploring.
“How much can I haul with my Big Dummy?”
“What’s better: Riding Loaded or Riding ‘Loaded’?”
“What year is my Surly and how do I read my bike’s serial number?”
All fine questions to be sure, but we’re gonna focus on that last one. So, why does the serial number matter? Well, some Surly riders want to know how old their bike is and which parts are compatible with their frame generation. Others just really like their bike and want to be ready in case someone else rides off with it. (With that said, if you haven't registered your bike yet, set your beer down and register your Surly bike right here.)
Now, the very first Surly bikes don’t have model codes or serial numbers. We’re sorry about that, and we recommend hanging onto those legacy models extra tight so nothing bad ever happens. About 10 years ago, though, we started putting serial numbers on all of our bike frames and forks. Let’s check out how they work.
As long as you are not currently sitting on your Surly bike, flip it upside-down and put your eyeballs on the bottom side of the bottom bracket shell.
You should see a model name or code stamped into the steel. This’ll look something like “Troll XL” if you’re riding an extra-large Troll, or “1xFun S” if you’re riding a small Lowside.
If you can’t read the serial number, there are a couple of tricks that may help you read the serial number better:
Trick A: Try using the old crayon / pencil rub technique. Take a piece of paper, lay it on the BB shell, then rub gently with the side of the crayon to see the letters/numbers magically appear on the paper. Straight out of James Bond’s playbook.
Trick B: This is probably the easiest and most effective, so we recommend starting here. Use a flashlight and shine the serial number at a low angle to help create shadows.
Fun Fact: Instead of always using the model name, we’ll sometimes use a code name like 1xFun to amuse ourselves. At the bottom of the Spew, we’ve added a list of all the model codes you might see on a Surly frame.
After locating the model code on your bike, look for a series of letters and numbers nearby. The letter comes first and indicates the factory where the frame was produced. If you see a big “M,” that stands for Maxway. Located in Taiwan, Maxway is currently Surly’s only frame supplier.
Following the factory letter, the first two digits mark the year. Next, two more digits mark the month, and the four final digits tell you the unique production number assigned to your specific bike.
The final result might look something like M19051234, with M once again standing for Maxway; 19 standing for 2019; 05 standing for May; and 1,234 indicating that 1,233 other bikes rolled off the factory floor that month before yours did.
But what if you look for that series of letters and numbers and it starts with a “W” instead of an “M”? We can explain that, too. Axman in Taiwan assembles almost all Surly frames and follows the serial-number format explained above, but starting with the launch of Big Easy in model year 2019, we partnered with a new frame assembler — Willing in Taiwan — because of their familiarity with Bosch electric bike motors and batteries. Willing has also assembled a few model year 2019 Cross-Check and Steamroller frames for us, and they do serial numbers a little differently. Here’s how they look.
Starting with a W for Willing, the second letter is E, which is how Willing identifies Maxway as the frame supplier. Next is the number 9 for model year 2019. Future model years will be coded by a letter instead of a number, such as A for ’20, B for ’21, or C for ’22.
After WE9 comes the production month, marked by A for January, B for February, C for March, and so on. So if, for example, you get your hands on a Big Easy, Cross-Check, or Steamroller assembled in August 2019, its serial number will begin with WE9H. Finally, the serial number will end with five digits indicating how many unique frames rolled off the line before yours that month. A serial number that looks like WE9H00168 means your bike was the 168th Surly frame Willing assembled in August of 2019. It might look a little different from the rest of the Surly serial numbers out there, but that just means your bike is special, which you already knew.
Because Surly frames and forks are often sold separately, Surly forks need a serial number that’s unique from the one on the frame. And because we currently use three different fork suppliers, our fork codes vary a bit depending on where they come from. The good news? One day all the fork codes might look the same. We’re working on it, anyway. In the meantime, if you have any questions about how to read the code on your fork, contact [email protected] or call 1-877-743-3191 and we’ll help you sort that out.
Till next time,
Here’s that list of model codes we promised.
Big Easy: BE
Big Dummy: BD
Big Fat Dummy: BFD
Bridge Club: BC
Long Haul Trucker: LHT
Disc Trucker: LHTD700
Ice Cream Truck: ICT
Karate Monkey: KM
Midnight Special: MS
Pack Rat: PR
How do I find out the year of my bike?
The obvious starting point to find the date a bike was made is the serial number. Serial numbers are stamped onto the bike during the manufacturing process. They are a useful tool in helping recover bikes after theft and also to establish the model. The good news is most bikes have them.
Can you look up a bike serial number?
Your bike’s serial number will most likely be found underneath the bike’s bottom bracket. So, turn your bike around and look for the spot where the two pedal cranks join. What might happen, however, is that there’s no serial number there.
Where is the serial number on a surly bike?
As long as you are not currently sitting on your Surly bike, flip it upside-down and put your eyeballs on the bottom side of the bottom bracket shell. You should see a model name or code stamped into the steel.
How do you read a bike serial number?
Most bicycle serial numbers are located under the bottom bracket where the two pedal cranks meet. Simply turn your bike upside down and record the number. If there is no serial number there then check places like the headset at the front of the bike or the rear stays.
How can you tell a fake Specialized bike?
Counterfeit frames lack a serial number on the bottom of the frame or have a sequence starting with letters, like “GK.” Many fake Venge or Tarmac frames have the serial number WSBC604292544K.
How do I know what GT bike I have?
GT serial numbers are usually found stamped on the bottom of the bottom bracket of your BMX.
How do you read a Schwinn serial number?
Example Numbers Schwinn serial numbers commonly have one of three formats: All numbers. One letter followed by numbers. Two letters followed by numbers.
How do I find my Cervelo serial number?
Most of Cervélo’s serial numbers can be found underneath the bottom bracket shell of your bicycle. Some models of bicycles have the serial number located on the left dropout. On older model bicycles you can find the serial number stamped into the actual bottom bracket shell.
How can you tell if a Schwinn bike is vintage?
Look for the serial number on the lower head tube (right above the wheel on the front of the bike ) for Schwinns produced between 1970 and 1979. Those produced after these dates will usually have a serial number stamped on the bottom bracket shell (the rear axle hanger holding the wheel in place).
How long is a serial number on a bike?
What is a bicycle serial number? Most (but not all) bicycles have a serial number. They’re usually referred to as a bicycle serial number, but also at times called a “frame number.” They are stamped onto the frame of a bike and range from 6 to 10 digits long.
Where is surly bikes made?
Most of our products (including all frames and forks) are manufactured in Taiwan.
How do I find out the make and model of my bike?
Regardless of make or model, most serial numbers are located somewhere near your cranks. Grab your bicycle and flip it upside down to start looking for a series of numbers and/or letters. Serial numbers can be sneaky little devils.
What does a serial number do?
Sometimes abbreviated as Serial No., SN or S/N, a serial number is a unique number used for identification and inventory purposes. A serial number allows a company to identify a product and get additional information about it, for replacement or to find compatible parts.
Do all bicycles have serial numbers?
Simply put, a bike serial number, also called a bike frame number, is a string of numbers with anywhere between six to ten digits. Each and every bicycle has a unique serial number assigned by its manufacturer.
From Surly themselves: "What year was my frame built?
You know that serial number on the underside of your bottom bracket? No?! Ok, so flip your bike over and take a look closely at the bottom bracket shell (the cylinder at the bottom of the frame around which your crank rotates). There will be a code stamped into the shell starting with the letter "M". Sometimes this stamp has a bunch of paint that has collected in it but look closely, it is there, I promise. The following number after the M signifies the last digit(s) of the production year of your frame. So, for instance, M2598144 was made in 2002, M8128666 was made in 2008 and M10034269 was made in 2010. Now write down the serial number and keep it somewhere you can find it in case your bike gets stolen. This might be the only identifiable mark on your frame if it comes back to you!"
answered Feb 24 '14 at 23:40
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