Tubing decals (Reynolds, Columbus, etc.) also changed designs for same tubing made in different years, although the changes aren't made as often, and manufacturers didn't always put tubing Brand decals on every model. This applies only if decals are original or have been replaced with the identical design. Many changed decal design for the same model bike often yearly, with special/limited editions even more specific. can help not only determine models, but also year of manufacture. *Decals: style/design, amount, placement, color, etc. So a frame with an original 501 decal can't be from the 70', 531 decal doesn't help as much because of the range of years produced. Reynolds 531 tubing introduced around 1934, still used today Reynolds 501 tubing introduced around 1983).
Shifting ramps and pins on cassettes/sprockets and chainrings (versus flat sprockets)įrame material (e.g., shift from tubular steel to use of CF and hydroformed aluminium)įrame tubing type (e.g. threadless)īraking system (especially with mountain bikes: v-brake, direct pull, etc.) How the steerer attaches to the fork (quill vs. Quick releases versus contemporary through-axles
The span of answers would include things such as: To some extent, these will also help you narrow down the model as well as it will tell you what distinguishing features to look at. Each 'answer' should address a different way to determine the manufacturing year of a bicycle. This is a canonical question that will hopefully encompass all of the questions we get asking us to determine what year a bicycle was manufactured (how old is my bike, how old is my frame, etc.).
#Giant bicycle serial number decoder serial numbers#
Piano Serial Numbers Find Your Piano’s Age & History Piano serial numbers identify the (1) age of your piano, the (2) piano's year of manufacture, as well as (3) the circumstances surrounding the production of your piano, including factory history, manufacturing processes, and company ownership and oversight. The number will have a production month letter in either the first or second position and a production year number in the other (first or second) position. Bicycles from Japan will have serial numbers located on the left, rear axle hanger, on the bottom bracket shell or on the lower section of the headlug.