![]() ![]() 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. These are for Model 800, 830 and 850 mountain bikes and Model 300 road bikes. In the meantime, we have the results of the serial number decoding project. Trek bicycle frame serial numbers (SNs) are stamped into the bottom of the. 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:
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