Sometimes refered to as the 'Large' and 'Standard'
Finishes: Chrome with Blue or Red components / Flamboyant Red or Blue with Gold components
Specification
Frame: 4130 Chromoly (koizumi)
Forks: 4130 Chromoly, Dual Position (leading axle and centerline) (Koizumi)
Handlebars: Diamond Back Chromoly, Medium (Koizumi)
Stem: Diamond Back (Sugino)
Grips: Vinyl (OGK MACK)
Headset: MX (Tange)
Rims: 7C, 20x1.75 shineside (Chrome model), 7X, 20x1.75 in gold for Red/Blue model (Araya)
Spokes: .080/36 Chrome Plated
Hubs: Alloy Large flange (Suzue)
Tyres: Diamond Back Skinwall Knobbies 20x2.125 rear, 1.75 front (IRC)
Brakes: 890 rear (Dia-Compe)
Levers: Pre-Bent (Dia-Compe)
Cable: Dia-Compe
Pedals: BM-7 (MKS)
Crank: 175 Chromoly one-piece (Sugino)
Bottom Bracket: (Tange)
Chainring: 44T (Sugino)
Spider: (Sugino)
Freewheel: 16T easy-off (Suntour)
Chain: (HKK)
Seat: Diamond Back (Kashimax)
Seat Post: Fluted
Seat Post Clamp: Alloy (Suntour)
Additional Information
Lifecycle: 1979 to 1981
Serial number location: inside of rear dropout starting 9,0 or 1 and ending with baseball symbol
Rear dropout: 1/8' (3mm) - Mild Steel
Top tube length: approx 18.7/8' (480mm)
Options - Bike or Kit - Available with either one-piece Chromoly Crank and Bars or Three Peice Alloy Crank and Bars. Diamond Back 'RAD-PAD' pad sets also available.
NB - only the B, C and D kits were options for the Pro
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