![]() In early 1976, the letter C was added to denote Cromo ' During the early production of the Mongoose frames they were made using 1010 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.Ī further feature was the headtube was offset to extend more to the bottom than it was to the top. The early 75 coaster brake tab is also thicker and is comprised of two layers of steel welded togetherĪnother feature of an early 1975 frame was the chainstay brace where it connected the seat tube. Some time late 1975 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. They begin at 10001 and continue until early 1976 when a revised stamp begins to include place of manufacture indicated with the letter 'C' ( for Chatsworth, California) followed.Ī feature of an early 1975 frame is the brake tab. 1975 serial numbers were a hand-stamped five number, individual frame ID. ![]() But if the company says its an 78 repro, then thats what it is, i think that all the repro's were based off the 1978 model. Re: Mongoose Serial Number Info oh, i must have misread your question, i was saying that serial number indicates a 82 goose. For example, a frame from 1975 will have the numbers like 11994. For the most part the early Mongoose frames from 1975 and into early 1976 were done with hand stamped 5 digit numbers starting from 10000. Identifying the serial numbers on the early Mongoose frames is actually quite easy and intuitive. ![]() Interpreting the Serial numbers and features on BMX Products, Inc.
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