Diamond Back Senior Pro

The senior pro bmx in detail
Diamond Back Senior Pro – 1983

Diamond Back Senior Pro Specifications

FinishTriple high-lustre chrome.
FrameDiamond Back Pro Large, 4130 chrome-moly. (Koizumi) 1.9kg / 4lb 4oz
ForkDiamond Back Pro Large 4130 chrome-moly. (Koizumi) 700g / 1lb 9oz
HandlebarsDiamond Back Pro, 4130 chrome-moly. (Koizumi)
GripsOakley II.
StemDiamond Back (by Sugino) aluminium alloy clamps with chrome-moly shaft.
RimsAraya 7X with polished sides.
SpokesDouble-butted stainless steel with alloy nipples, 80/60.
HubsSunshine Pro-Am track hubs.
Brake calipersDia-Compe 890 quick-adjust side pull rear callipers. Dia-Compe two-finger brake lever. Kool-Stop International air-cooled brake pads.
Brake leversDia-Compe.
Brake padsDia-Compe.
TiresDiamond Back Skinwall Knobbies (by IRC).
PedalsDiamond Back BM10 (by MKS).
CranksSugino one-piece chrome-moly, chromed, 175mm.
Bottom BracketTange
Front Sprocket44T, Diamond Back (by Sugino) chainwheel. Sugnio Spider.
Rear Sprocket16T SunTour
ChainSedis Sport 3/32 inch
SeatDiamond Back (by Kashimax).
Seat Post7/8″ Fluted aluminium alloy.
Seat Post ClampSunTour, aluminium alloy.

Identifying characteristics

The Diamond Back Senior Pro is a Koizumi made Diamond Back frame and forks. It is part of the pro kit.

The production run was from mid 1981 until 1983. The senior pro was the base bike that developed into the legendary Harry Leary Turbo model.

Identifying characteristics/things to look out for include:

  • serial number beginning with either a 1 ,2 or 3 meaning 1981, 1982 oe 1983
  • Loop tail