And the '9' is the last digit of the year.1979. the 'H' in that serial is the 8th month, which is sept. If you had the 'T' in front, it meant it was a higher model, (team or super) if you have no 'T' its a motomag or standard version. The 'C' stands for chatsworth', which is where the original goose shop was in cali. To help make sense of the lettering is simple: if yours starts with CH9**** That would be a team (or super) january (a) first month, '0' for 1980 mongoose.Īnother hint is the supergooses had three (3) holes in the brake bridge after october 1981. They must be overseas frames but came in chrome so are supergooses. UPDATE: it seems that some time around 79-80 and later, some supergooses were made, but not in chatsworth. supergoose came in chrome only, the teams were nickel plated with either a blue or red coating.

If it starts with: TC, this means its a team or supergoose. Mid 1981 to early 1982 they started using the stepdown dropout with the 2 holes machined in it, thus, the birth of the 'super' dropout. Late 1977 to mid 1979 they added the brake bridge but lost the coaster mount. back then the serials were sometimes only 4 numbers, so looking at the frame was the only way to id the year.

1975 to late 1977 the frames have no brake bridge, and had the coaster brake mount welded on.

Mongoose bike serial number location