#MIRRACO BIKE SERIAL NUMBER SERIAL NUMBERS#
#MIRRACO BIKE SERIAL NUMBER SERIAL NUMBER#
#MIRRACO BIKE SERIAL NUMBER FULL#

They stopped with the flat backs in '83, then with the slants from '84 to I believe '90, then 91 untilll? Well it was in one peice till this morning. Then next came the first Californian and Expert frames and were USA made, while they were getting setup for Tiawan production.I just found a GT at the swapmeet and was wondering if any one could help me figure out the year of it.Дo the seat stays the rear triangle top tupe hit the top tube in front or behind the seat mast? I thought they swtoped making the flat backs before the 90's? USA made frames from post gusset era, still had the month first, then the year but they were stamped not on the bottom bracket but on the brace behind the bottom bracket.ДЄs a general rule anything with a Gusset behind the head tube was manufactured in the USA.

#MIRRACO BIKE SERIAL NUMBER SERIAL NUMBER#

J according to this serial number the frame was manufactured in October of Sometime in the bottom bracket brace was replaced with an open design see picture below.

If your frame has holes in the dropouts, BUT does not have 3 holes in the brake bridge, its NOT a supergoose, even if its chrome See dropouts page here.

#MIRRACO BIKE SERIAL NUMBER FULL#

These extra holes were only on the full cromo frames that had the 'step down' type dropouts. The easiest way is to check the brake bridge for the extra two slotted holes that were added. There was a few 'crazy' months around April, May and June inwhen there was mix of old and new dropouts being used. Also of note is the 'T' for teamwas also dropped. Cub cadet xt1 service manualДЄs before, the letter indicates the month and the first number or the second digit in the sequence indicates the last number for that year. The 'C' was dropped and they started out with a single letter followed by a sequence of numbers. In April and onwards the frames were coded differently. Very early team frames had a 'T' but without the flattened seat stay, but these are very few and were in mainly. This was done to give better clearance for the chain. The Team Mongoose and Supergoose frames are a little different. The next letter in the sequence is the month code. CH8 Again, the C stands for Cromo where the frames were manufactured.

#MIRRACO BIKE SERIAL NUMBER SERIAL NUMBERS#

So serial numbers that ran from May through to March will have three digits in sequence overtop the serial number of that frame. The serial numbers were hand stamped on the bottom bracket tubes then packed in empty beer boxes waiting to be welded to frame tubes.Д«MX Products Inc. Of course these are general guidelines in identifying Mongoose frames and there are the anomalies to this process of serial number identification. From here frames were stamped with the letter C for Cromo, a letter for the month, and a number for the year of production. In May the serial number process changed again with the addition of a month code. Another feature of an early frame built in - was the extra single gusset above the bottom bracket. Both frames looked the same but we need some way of determined the difference due to the frames being nickel plated or powder coated paint ,it was impossible to tell the difference in the material for warranty reasons. In earlythe letter C was added to denote Cromo ' During the early production of the Mongoose frames they were made using steel tubing,when we found problems with the heat from welding and breakage at the weld points they were changed to Chrome Molly tubing. This feature carried over for the first few years till the ashtabula forks were replaced with the more rounder style Tange made forks. It is our guess that it was done this way to allow clearance for the squarer shoulder on Ashtabula forks. Note the flared shape of the 75 frame vs the later style which carried on through all the later years of this frame style and the extended seat tube.ДЄ further feature was the headtube was offset to extend more to the bottom than it was to the top. Another feature of an early frame was the chainstay brace where it connected the seat tube. The early 75 coaster brake tab is also thicker and is comprised of two layers of steel welded together. Some time late and onwards it became a single layer of steel, more oval and thinner in shape. The brake tab on these frames is rectangular in shape. For the most part the early Mongoose frames from and into early were done with hand stamped 5 digit numbers starting from For example, a frame from will have the numbers like A feature of an early frame is the brake tab. Identifying the serial numbers on the early Mongoose frames is actually quite easy and intuitive.

Mirraco Bike Serial Number