Mongoose's premium race ready machine, the 1990 Californian Pro has taken many racers to number one. It features the exclusive Mongoose equilateral wishbone-style frame, made with triple butted Chromoly tubing. Special equipment includes: Chromoly racing handlebars and Chromoly/alloy narrow stem, a 400mm alloy seat pillar, a quick change alloy spyder, Mongoose competition brakes, patented Pro Class alloy rims, and a full pad set.
Headset Size
1"
Seatpost Size
26.0mm
Top Tube Size
495mm
Original Colours
LY89XX00000 LY90YY00000
Made in Taiwan.
The first two numbers in the serial indicates year of production. 89 = 1989, 90 = 1990. The third and fourth numbers (as shown in the examples above) indicate production Month. XX = 05 to 12 May to Dec. YY = 01 to 04 Jan to April. For all serial number sequence explanations, see the mid-school serial guide page.
Mid School Serial Guide
Bikes made in Taiwan usually had an 6-9 month production and shipping timeline before they were sold in bike shops around the world. In May of any year, factories would usually switch production to making models for the following year.
| HT˚ | ST˚ | ST | CS | BB | WB | FR |
| 71˚ | 72˚ | 228 | 365 | 33 | 930 | 34 |
HT˚ = Head Tube Angle, ST˚ = Seat Tube Angle, ST = Seat Tube Length to top, CS = Chain Stay Length, BB = Bottom Bracket Height, WB = Wheel Base Length, FR = Fork Rake. All dimensions center-to-center unless otherwise noted. Dimensions provided in millimeters.
