How do you tell what year my bike is?

Your serial number can be found on the bottom bracket, the back of the seat tube or on the rear dropouts.

How do you tell what year my bike is?

6 Ways to Find the Age of Your Bicycle
Check the Serial Number. The obvious starting point to find the date a bike was made is the serial number. Use Online and Offline Literature. Look at Specific Parts. Ask the Seller or Owner. Bring It to a Bike Shop. Post Online.