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.
Headset Size
1 1/8"
Seatpost Size
25.4mm
Top Tube Size
20.75
Original Colours
XC98Y0000 XC99Y0000
Made in Taiwan.
First two numbers in the serial indicates year of production. 1998 or 1999. Y in the example above indicates production month
Bikes made in Taiwan usually had an 5-8 month production and shipping timeline before they were sold in bike shops around the world. Bikes welded in the later months of the year would normally be made for the following year.
For more detail on what the serial number means on your mid school GT BMX, check out our easy-to-follow serial number guide.
