Frames were normally manufactured the year before being sold in bike shops.The best chance at recovering a stolen bicycle is having a registered serial number.The first thing everyone wants to know when the buy a second hand GT BMX is how old is it Reading the GT serial number and finding out the build date is an important part of any BMX restoration.Once you now when the old GT BMX bike was built its much easier to find out what model it is and also look at the original parts lists and colours from the bike makers catalogues.
Dyno Gt S How To Read MidA while back I spend some time investigating how to read mid-school and new school serial numbers on Mongoose BMX bikes. Dyno Gt S Crack The GTAfter buying and restoring a number of older mid-school and new school GT BMX bikes I also need to to figure out how to crack the GT serial numbers to get the same build date information. It didnt take long to realise there were many similarities when looking at GT serial numbers and Mongoose serial numbers. The placement and sequence of the numbers is stamped in the same place under the bottom bracket. Many of the GT serial numbers start with the same letter sequence. After a bit of digging around online I soon realised that GT BMX bikes and Mongoose BMX bikes were owned by the same company and also made in the same factories in Taiwan. In fact look closely at many Mongoose and GT BMXs from the around 2000 to 2010 and youll see many similarities in frame design and geometry. This is probably not true for all of the bikes in either range, but there were a number of bikes that were identical apart from the logo stamping. As with the Mongoose serial numbers there are many posts from forum members around the world on old-school GT serial numbers, but very little on mid-school or new school. Of course there are also many variations in GT serial numbers and I have focussed mainly on cracking the new-school numbers for now. That is bikes made between 2000 and 2010, and those bikes made in the Taiwan factories with specific serial number sequences. ![]() GT serial numbers are usually found stamped on the bottom of the bottom bracket of your BMX. This is not always the case and there will be some bikes that do not fit into this formula. Dyno Gt S Series Of NumbersFor mid-school GT BMX bikes built in Taiwan through most of the 90s with a serial number that begins with 4 letters before the series of numbers. The 3rd letter corresponds to the year of manufacture. A B C D E F G H I J 91 92 93 94 95 96 97 98 99 00 The 4th letter indicates the Month A B C D E F G H I J K L Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec A few examples are: HF GB 00000 4 letters, GB are the dates. G is the year (1997), B is the month (Feb) HF BH 00000 4 letters, BH are the dates. B is the year (1992), H is the month (Aug) For new-school GT BMX bikes built through most of the 2000s with a serial number that begins with 5 letters. The 4th letter corresponds to the year of manufacture and follows on from the mid-school serial numbers. K L M N O P Q R S T 01 02 03 04 05 06 07 08 09 10 The 5th letter indicates the Month A B C D E F G H I J K L Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec A few examples are: HAM RF 00000 5 letters, RF are the dates. R is the year (2008), F is the month (Jun) HAM OI 00000 5 letters, OI are the dates.
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