The 1989 M-1 is Mongoose's best sling model. It is available with either a coaster brake or freewheel with such high performance features as: Pro Class rims, Mongoose design 43T alloy CD chaining, racing pedals, Mongoose design sure hold grips, competition saddle along with a complete safety pad set. Also available in a Junior size called M-1 Mini (coaster brake model only).
Headset Size
1"
Seatpost Size
22.6mm
Top Tube Size
Unknown
Original Colours
M8X000000 M9Y000000
Made in Taiwan
Second digit indicates year of production (1988 or 1989). X indicates late production months. This will be a letter F to L which stands for Jun to Dec. Y indicates early production months. This will be a letter A to G which stands for Jan to Jun.
