You are not logged in.

GT Serial Number Info  RSS Feed

#1 2008-08-04 3:26am

djd93306
Vet Pro
From: Bakersfield, CA
Registered: 2007-11-25
Posts: 3478
Bikes: 34

GT Serial Number Info

Anything youve noticed me leaving out please post it. Heres a collection of serial number examples to help you figure yours out.

Early Santa Ana serials, rear dropout.
31765 Can be found both with as well as without a model abreviation nearby. 3 for the third month March. 1 for the year 1981.

Santa Ana serials, rear dropout.
7841112 with a model abreviation stamped nearby.(3, 4, L4, Jr, FS, I, M1, M1M, PE, JPE, XL, XXL, XL E, 24, F) 7 for the 7th month July. 84 for the year 1984. Same code in the 1990s as well.
GT6842174 without a model abreviation. GT for GT. 6 for the sixth month June. 84 for the year 1984.
GT00185 without a model abreviation. GT for GT. 001 for the production #. 85 for the year 1985.

If the serial is just like these on the rear dropout but without a model abreviation its also US made, but in Huntington Beach.
7872459 without a model abreviation. 7 for the 7th month July. 87 for the year 1987.

Japanese serials.
Some of the Japanese factory's stamped the serial's on the rear dropout.
5X02157 with a baseball symbol.  5 for the year 1985.
5L0139 with a baseball symbol.  5 is for the year 1985. L for the 12'th month December.
GH891203267  G for the production line. H for the factory. 89 for the year 1989. 12 is for the 12'th month Dec. 90 model.
DH900413372  D for the production line. H for the factory. 90 for the year 1990. 04 is for the 4'th month April.

Some of the Japanese factory's stamped the serial's on the bottom bracket.
65J03205  6 for the production line. 5 for the year 1985. J for the 10'th month October.
G5I2981  G for the production line. 5 for the year 1985. I for the 9th month September.
F6026521  F for the production line. 6 for the year 1986. 02 for the 2nd month February.
T8040164  T for the production line. 8 for the year 1988. 04 for the 4th month April.
KS89111512 K for the factory. S for the production line. 89 for the year 1989. 11 for the 11th month November. 90 model.

Taiwanese serials, usually on the bottom bracket. Sometimes they are on the rear dropout though.
DS6I2760  DS for the Factory. 6 for the year 86. I for the 9'th month September.
DS7122150 DS for the factory. 7 for the year 1987. 12 for the 12'th month December. 88 model.
N0573129  N for the production line. 0 for the year 1990. 5 for the 5'th month May.
KGH1E3951  K for the factory.GH for the production line. 1 for the year 1991. E for the 5'th month May.
KG2A00220  K for the factory. G for the production line. 2 for the year 1992. A for the 1'st month January.

This one is made in the same Kinesis factory in Taiwan as the last two.
KGCG02419 K for the factory. GC for the production line. G for the 7'th month July and C stands for Year 1993.

Most foreign serials decode the same as those do but have different numbers of digits and letters.
YC96H39112  YC for the factory. 96 for the year 1996. H for the 8th month August.
YC4H3221   YC for the factory. 4 for the year 1994. H for the 8th month August.

ACI4L01724  AC for the factory. I for the production line. 4 for the year 1994. L for the 12'th month December,  95 model.

FY96133615  FY for the factory. 96 for the year 1996.

S8IY14150  S for the factory. 8 for the year 1998. I for the 9th month Sept. Y for the production line.

8Y6J03148 8 for the production line. Y for the factory. 6 for the year 1996. J for the 10'th month October, 97 model.

SY6A000250  S for the factory. Y for the production line. 6 for the year 1996. A for the 1'st month January.

IG9D0211  I for the factory. G for the production line. 9 for the year 1989. D for the 4'th month April.

Heres a couple foreign serials that are different than the others.
HM160798Q  HM for the factory. 6 could be for the year 1996. The Q at the end is for the production line. The one I saw with this serial number is a 97 which tells me the 6 could mean it was built in late 96 as a 97 model or there is no build date whatsoever in it.
LS167495 LS for the factory. 1 for the production line. The one I saw with this number was a 94. Which means theres no build date in this serial.

[b]GT serials info page - http://bmxmuseum.com/bikes/info/122/

Last edited by Johnnny (2013-08-24 12:58pm)


Can you ever really have enough GT's?

Offline

 

#2 2008-08-04 10:00am

brian65
Expert
From: SoCal IE
Registered: 2008-06-26
Posts: 664
Bikes: 4

Re: GT Serial Number Info

Your info here is pretty easy to read versus ten pages of posts..

Would a graph and list of serials be too much work to create..??? line every ones number up,  that way anyone who comes in with a new number can place it in with similar serials and know what they have.. and would be nice to see what is what and what popular models are left...


84/85/86 GT Pro Performer

Offline

 

#3 2008-08-04 7:22pm

GTMark
Pro MemberBonded by Blood
From: north coast
Registered: 2007-09-09
Posts: 534
Bikes: 1

Re: GT Serial Number Info

yea, just the guy to do it! keep tuning it and it will be way better cool

Offline

 

#4 2008-08-05 6:24pm

djd93306
Vet Pro
From: Bakersfield, CA
Registered: 2007-11-25
Posts: 3478
Bikes: 34

Re: GT Serial Number Info

Thanks Mark, I do my best lol. tongue


Can you ever really have enough GT's?

Offline

 

#5 2008-08-07 7:18pm

GTMark
Pro MemberBonded by Blood
From: north coast
Registered: 2007-09-09
Posts: 534
Bikes: 1

Re: GT Serial Number Info

here's an ruff idea how to change/tune the MASTER LIST by years of frame design and then race vs. freestyle models serial for those years after:

1. 77-80 GT Frames - Most likely you won't find one with a serial number, including "Pedals Ready" (submit info if you have and it will be added to master serial list please, can be broken down by pics or links to ads/bikes)

2. 81-82 GT Frames - Serial # on inside of right rear dropout. 81-82 (81-83 and early 84s are considered Santa Ana (Award) Design):
They do not show an obvious 2 digit number. For Example: 52765 = 5 for the 5th month May. 2 for the year 82, number 765.
Under Serial number will be a model #: JR = Junior, 2=Expert (17.5" TT), 4 =PRO 18.5" Standard - measure top tube, if longer it is an ordered XL, - 24/26=Cruiser(Not sure of Letter Code_______?) Note: Skinny down tube and EURO BB applicable to these years.

3. 83-Early 84 GT Frames (considered Santa Ana (Award) Design)
They show an obvious 2 digit number. For Example: 083765 = ___________________________________(made up #)
Under Serial number will be a model #: JR = Junior, 3=Expert (17.5" TT), 4 =PRO 18.5" Standard - measure top tube, if longer it is an ordered XL, - 24/26=Cruiser(Not sure of Letter Code?)

4. 84-86 GT Frames - I'm crapping out here for the moment, but if you can break it down for race vs. freestyle starting around here and mix with what you have up now good?
7841112 with a model abreviation stamped nearby.(4, FS, I, M1, PE, XL, XXL, 24.....) 7 for the 7th month July. 84 for the year 1984. Same code in the 1990s as well.

If the serial is just like these on the rear dropout but without a model abreviation its still US made just not at Santa Ana.
7872459 without a model abreviation. 7 for the 7th month July. 87 for the year 1987.

ect, ect. ____________

Last edited by GTMark (2012-06-11 5:33pm)

Offline

 

#6 2008-08-07 10:53pm

djd93306
Vet Pro
From: Bakersfield, CA
Registered: 2007-11-25
Posts: 3478
Bikes: 34

Re: GT Serial Number Info

Mark your post is awesome as well. I say were getting close(other than a few tuneups as you said) and big props go to you for your help on the GT serial decoding and early variable frame specs. I think when you say I should put something to help people distinguish different models(race, freestyle etc.)you mean to add the specs along with the serial decoding thats already there? I would say that in that 84-86 era the parts where what seperated the different models. You can tell the difference in alot of models made in Santa Ana by the serial. For instance the FS stamp indicates you have a freestyle bike just doesnt specify what model. The race bikes made there in the later years are indeed very specific, PE=Pro Expert, XL=Pro Team extra long frame, 24=24" Pro Cruiser, M1=Mach One, I=Interceptor etc...

Last edited by djd93306 (2008-08-08 9:25am)


Can you ever really have enough GT's?

Offline

 

#7 2008-08-08 12:21am

RXREKTD
Pro Member
From: Los Angeles, CA
Registered: 2008-05-02
Posts: 1289
Bikes: 1

Re: GT Serial Number Info

This is just what I was looking for.  big_smile  thanks guys!!  cool


Looking for a few parts so please PM me if you have it:

24" Gold Araya/Ukia Speedline Hoops
Single Comp III Yellow Label 24 x 2.125 in black
Single Knarler Knobby 24 x 1.75

Offline

 

#8 2008-08-08 12:21pm

djd93306
Vet Pro
From: Bakersfield, CA
Registered: 2007-11-25
Posts: 3478
Bikes: 34

Re: GT Serial Number Info

luisondobiarieal wrote:

I HAVE A GT CAN U TEL ME THEINFOR MATION ON IT


SERIAL #
AN9080553

Now heres a number type I am unfamiliar with. I would guess 90 or 99 but we need pics to figure it out for sure. Post some pics so we can figure that type # out and then I can add it to the list.

Last edited by djd93306 (2009-04-19 3:07am)


Can you ever really have enough GT's?

Offline

 

#9 2008-08-08 1:15pm

GTMark
Pro MemberBonded by Blood
From: north coast
Registered: 2007-09-09
Posts: 534
Bikes: 1

Re: GT Serial Number Info

djd93306 wrote:

you mean to add the specs along with the serial decoding thats already there? I would say that in that 84-86 era the parts where what seperated the different models. For instance the FS stamp indicates you have a freestyle bike just doesnt specify what model. The race bikes made there in the later years are indeed very specific, PE=Pro Expert, XL=Pro Team extra long frame, 24=24" Pro Cruiser, M1=Mach One, I=Interceptor etc...

yes, the FS is what i meant and the MI, PE for race according to years.

give me a few days, some 2 cents coming that you might want to add

Last edited by GTMark (2008-08-13 5:37am)

Offline

 

#10 2008-08-08 1:26pm

djd93306
Vet Pro
From: Bakersfield, CA
Registered: 2007-11-25
Posts: 3478
Bikes: 34

Re: GT Serial Number Info

Well I think thats all great ideas except the how to tell what model FS they are by just the serial. I dont think you can, I have seen Performers and Vertigo's made in the US with the same serials as the PFTs. There is 1 good thing though, at least the different models became easily distinguishable so just a quik glance and you can tell what you got PFT, Performer or Vertigo.


Can you ever really have enough GT's?

Offline

 

#11 2008-08-08 1:34pm

RXREKTD
Pro Member
From: Los Angeles, CA
Registered: 2008-05-02
Posts: 1289
Bikes: 1

Re: GT Serial Number Info

How about this serial #?  65J03164.  Can't make any sense of it reading this post.  Can anyone help?  It came off a Performer.  I'm guessing it's an 85.  But that's just a guess.  Don't know what the 6 means in front of it.


Looking for a few parts so please PM me if you have it:

24" Gold Araya/Ukia Speedline Hoops
Single Comp III Yellow Label 24 x 2.125 in black
Single Knarler Knobby 24 x 1.75

Offline

 

#12 2008-08-08 1:43pm

GTMark
Pro MemberBonded by Blood
From: north coast
Registered: 2007-09-09
Posts: 534
Bikes: 1

Re: GT Serial Number Info

good info big_smile

Last edited by GTMark (2012-06-11 5:34pm)

Offline

 

#13 2008-08-08 2:17pm

djd93306
Vet Pro
From: Bakersfield, CA
Registered: 2007-11-25
Posts: 3478
Bikes: 34

Re: GT Serial Number Info

RXREKTD wrote:

How about this serial #?  65J03164.  Can't make any sense of it reading this post.  Can anyone help?  It came off a Performer.  I'm guessing it's an 85.  But that's just a guess.  Don't know what the 6 means in front of it.

Its a Japanese Oct 85 build date.

Last edited by djd93306 (2008-08-19 2:22am)


Can you ever really have enough GT's?

Offline

 

#14 2008-08-08 2:35pm

RXREKTD
Pro Member
From: Los Angeles, CA
Registered: 2008-05-02
Posts: 1289
Bikes: 1

Re: GT Serial Number Info

Thanks djd!!  You tha man!  Anyway, where in So Cal u located?  I'm out here in Carson.


Looking for a few parts so please PM me if you have it:

24" Gold Araya/Ukia Speedline Hoops
Single Comp III Yellow Label 24 x 2.125 in black
Single Knarler Knobby 24 x 1.75

Offline

 

#15 2008-08-08 2:42pm

djd93306
Vet Pro
From: Bakersfield, CA
Registered: 2007-11-25
Posts: 3478
Bikes: 34

Re: GT Serial Number Info

Bakersfield, about 100 miles north of LA. You know what, after another look at your serial it probably is a 85 model. That pr. # looks too high to be an early 86.


Can you ever really have enough GT's?

Offline

 

#16 2008-08-08 2:47pm

RXREKTD
Pro Member
From: Los Angeles, CA
Registered: 2008-05-02
Posts: 1289
Bikes: 1

Re: GT Serial Number Info

Cool.  That's what I want.  An 85!  Thanks for double checking.  Yah, Bakersfield is far from me.  I'm about 20 miles SOUTH of L.A.


Looking for a few parts so please PM me if you have it:

24" Gold Araya/Ukia Speedline Hoops
Single Comp III Yellow Label 24 x 2.125 in black
Single Knarler Knobby 24 x 1.75

Offline

 

#17 2008-08-09 6:38pm

djd93306
Vet Pro
From: Bakersfield, CA
Registered: 2007-11-25
Posts: 3478
Bikes: 34

Re: GT Serial Number Info

Awesome, glad to hear thats what you wanted. I love the 85's too, I ride mine constantly.


Can you ever really have enough GT's?

Offline

 

#18 2008-08-10 4:31pm

Kicks
Member
From: Melbourne, Australia
Registered: 2008-02-16
Posts: 72
Bikes: 12
Website

Re: GT Serial Number Info

hey Djd
thanks for the info on my 88 24 decals. seems to be an info/ad void for racing frames between 86-90. Anyone?
good work on the serials info!
thanks.

Offline

 

#19 2008-08-10 5:08pm

djd93306
Vet Pro
From: Bakersfield, CA
Registered: 2007-11-25
Posts: 3478
Bikes: 34

Re: GT Serial Number Info

Well from 87-96 all Pro Series are US made just like the Pro Freestyle bikes. Mach Ones and Interceptors from the 80s have the same 18.5" top tube as the basic Pro Series. There is the L4 which where typically an extra inch long Pro frame. I believe in 87 they started the updated model abreviations(PE, XL, XXL, M1, I....) in Santa Ana. In the 90's the sizes started to vary more.

90's GT Mach One and Pro Series specs
84-96 The Mach One's have an 18.5"tt.
97-98 The Mach One's have a 20"tt.
99-00 The Mach One's have a 20.5"tt.
89-92 The Pro Series Expert have an 18.5"tt, Pro Series XL had a 19.5"tt and Pro Series XXL had a 20.5"tt.
93-96 The Pro Series Expert have a 19.5"tt and the Team model or XL stamped frame had a 20.5"tt.
98 the Pro Series have a 20.5"tt.
99/00 the Pro Series XL Plus have a 20.91"tt.


From 84-86 the PS, M1 had the the same frame. I have seen Mach Ones and Interceptors stamped with a 4  and I guess since they had the same frame specs as the normal Pro frame that they used the same Pro frames they used to build Pro Series on them. I guess its more than likely that only the L4 frames in the mid 80's were all US made. Where as the late 85-86 standard 4 Pro frames were also made in Japan. You just dont see the 4 stamp on them, different serials. You also wont see any of these abreviation stamps on a Huntington beach model.

Early 80's GT Santa Ana Handlebars Specs
Looks like they made 5 versions of the early GT bars.
Expert bars reg   6.75"rise  27.5"width (bars in one of my pictures)
Expert bars wide  6.75"rise  29"width  (lots of reference available for these bars)
Pro bars             7.75"rise  27.5width(bars in my pictures and that 280hpwrx also has 3 of)
Big Pro bars        8.75"rise  29"width(these are what you have and TYLER DERDEN knows about)
Big Big Pro bars    10"rise   29"width(these are the bars you and TrulyodD know about)

Last edited by djd93306 (2009-08-28 2:33pm)


Can you ever really have enough GT's?

Offline

 

#20 2008-08-11 8:32pm

djd93306
Vet Pro
From: Bakersfield, CA
Registered: 2007-11-25
Posts: 3478
Bikes: 34

Re: GT Serial Number Info

Heres a pretty cool ad. 84 Mach One.(The OG)
http://i258.photobucket.com/albums/hh245/djd93306/Mach%20One%20Pic/018.jpg


Can you ever really have enough GT's?

Offline

 

#21 2008-08-13 12:09pm

brian65
Expert
From: SoCal IE
Registered: 2008-06-26
Posts: 664
Bikes: 4

Re: GT Serial Number Info

OK I looked but didnt see the serial number on my 91 pft, just the FS on the drop out, the powder is pretty thick but can clearly see the FS...maybe on the inside????
was also looking at a 92 mini that had M I I on the drop.

Last edited by brian65 (2008-08-13 12:12pm)


84/85/86 GT Pro Performer

Offline

 

#22 2008-08-13 1:45pm

djd93306
Vet Pro
From: Bakersfield, CA
Registered: 2007-11-25
Posts: 3478
Bikes: 34

Re: GT Serial Number Info

brian65 wrote:

OK I looked but didnt see the serial number on my 91 pft, just the FS on the drop out, the powder is pretty thick but can clearly see the FS...maybe on the inside????
was also looking at a 92 mini that had M I I on the drop.

Im sure the # is there under the powder on your 91 PFT but dont strip it to see if it is, its legit. The mini is a mini Mach One.

Last edited by djd93306 (2008-08-13 1:47pm)


Can you ever really have enough GT's?

Offline

 

#23 2008-08-13 3:26pm

brian65
Expert
From: SoCal IE
Registered: 2008-06-26
Posts: 664
Bikes: 4

Re: GT Serial Number Info

No scraping on this PFT for sure... Ill take another look, maybe need wear my sun glasses since the neon yellow powder is so bright........ And correction, that mini had a M1 M stamp. makes sense the second M is for Mini......


84/85/86 GT Pro Performer

Offline

 

#24 2008-08-16 9:49pm

jimi
Member
Registered: 2008-07-27
Posts: 25

Re: GT Serial Number Info

Great work on the serial numbers.I have read thru all these threads and maybe I'm just slow, but I'm still a little confused.I have an 84 pro series and the serial number is 9841839.The confusing thing is that it has a FS stamped below the number.Any ideas?

Offline

 

#25 2008-08-17 6:55am

djd93306
Vet Pro
From: Bakersfield, CA
Registered: 2007-11-25
Posts: 3478
Bikes: 34

Re: GT Serial Number Info

jimi wrote:

Great work on the serial numbers.I have read thru all these threads and maybe I'm just slow, but I'm still a little confused.I have an 84 pro series and the serial number is 9841839.The confusing thing is that it has a FS stamped below the number.Any ideas?

They must have used the wrong stamp on it, they typically have a 4 or L4. Really means nothing unless you have a Performer frame thats stickered as a Pro Series lol.


Can you ever really have enough GT's?

Offline

 

Board footer

View Cart →