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Technical & Reference Section => Tech and Restoration => Topic started by: steve on May 13, 2006, 08:20 PM

Title: how do you date a gt by its serial number
Post by: steve on May 13, 2006, 08:20 PM

-and what is M I ?

serial number -12925091
then under
M I

-CLUES
-rings on head tube
squared not angled top tube through seat tube gt 4130 on cap

-gt stamped on all 4 sides of rear drop outs
-18.5 inch top tube


-right - so its a us built one, as the number is on the drop outs
-so is it a jan 82
or a december 92??

Title: Re: how do you date a gt by its serial number
Post by: Moza on May 14, 2006, 03:15 PM

The top tube size indicates a standard model, my number was under the bottom bracket and had 84 in it. That seems to indicate an 1984 bike. I could be wrong but if your top tube is flat and not sloped im sure its before 1984, its just that all the GTs ive found on the net are like this before 84. Ive had the same trouble tracking my frame it seems its a standard 84 frame with pre 83 forks. Its in this resto section somewhere.

Title: Re: how do you date a gt by its serial number
Post by: stuntmaster on May 14, 2006, 05:24 PM

dec 92 beware tho as some gt `s weren`t made in usa and the serial number`s of them is totally different as had a perfomer that was like that

Title: Re: how do you date a gt by its serial number
Post by: steve on May 14, 2006, 08:11 PM

the yank site reckons
-serials on the bottm bracket, are jap made ones
-and numbers on the drops are us ones
-not that i makes a difference to me
-but i like the idea od it being early
-kind of feels early???

Title: Re: how do you date a gt by its serial number
Post by: aditup2004 on May 14, 2006, 08:40 PM

Dec 92.
Is it the same as this;
(http://www.radbmx.co.uk/archive/albums/y43/aditup2004/DSCF0735.jpg)
If it is, this is a 92 also. I have 2 of the same year with similar frame no's.
Ad

Title: Re: how do you date a gt by its serial number
Post by: steve on May 14, 2006, 08:48 PM

yup
-and this
(http://i17.ebayimg.com/04/i/07/14/8e/26_12_s.JPG)

dec 1992 mach I
 :LolLolLolLol:
-have you a spare set of forks?
-they are us made ones
 :10_2_12:

Title: Re: how do you date a gt by its serial number
Post by: steve on August 22, 2006, 11:41 AM

Quote from: aditup2004 on May 14, 2006, 08:40 PM

Dec 92.
Is it the same as this;
(http://www.radbmx.co.uk/archive/albums/y43/aditup2004/DSCF0735.jpg)
If it is, this is a 92 also. I have 2 of the same year with similar frame no's.
Ad

by 1990 -he rear lower tube bends up and meets the other tube??

Title: Re: how do you date a gt by its serial number
Post by: Bananaman on August 22, 2006, 12:00 PM

Try this :daumenhoch:

http://bmxmuseum.com/bikes/info/122/

Lee