1999 GT Bump. Full CrMo GT trail frame. Threadless GT trail fork, with 1-3/8 inch legs, super-thick CrMo steering tube with internal reinforcing sleeve. GT one-piece CrMo 180mm cranks. Aluminum GT platform pedals. GT Mohawk 48-hole hubs. Powerlite Retro-Tread tires. Super thick 1.8mm (0.070 inch) wall CrMo GT trail handlebars. GT CrMo micro adjust seatpost. GT bottom bracket. 1-3/8-inch CrMo blades.
Frame & Fork
GT 1pc CR-MO Cranks
Weinmann Zac-X Alloy Rims
To use the BMX SerialFinder start typing the whole serial into the search bar at the top of the page, or use the Advanced Search page. Based on your entry, a filtered list of possible bikes that match your serial year and month will appear.
GT BMX serial numbers.
There are a number of possible serial sequences depending on where the frame was made.
Made in Taiwan. The first two characters - YC are the factory code. The next two characters is year 98 = 1998, 99 = 1999. The next characters is the month. A = January, B = Febuary, C = March, D = April, E = May, F = June, G = July, H= August, I = September, J = October, K = November, L = December.
Examples: YC98I0000
As a general rule, bikes made in Taiwan at this time had around an 8 month production lead timeline before they were delivered and sold in bike shops around the world. Generally around May of each year, factories would usually switch production to making models for the following year.
