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1975 Centurion Semi Professional

Bike tags: Single speed
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1975 Centurion Semi Professional


Tange Levin

Sugino Mighty


16T x 44T

I picked up this bike on craigslist as a frame, fork, and crank arms with no other components. Currently, it's a single speed; eventually, I plan on doing a complete restoration. I found the specs for a 1976. I can't imagine 1975 would have been all that different.


Frame Size: 21.5", 22.5", 23.5", 24.5", 25.5"
Frame: Tange Champion No.1 double-butted chromoly tubing, forged tip.
Lugs: Centurion Professional
Fork: Tange Professional chromoly tubing, forged end
Head Set: Tange Falcon
Handle Bar: Sakae World Randonneur alloy
Stem: Sakae Royal
Brakes: Dia-Compe Gran-Compe side pull, black
Derailleurs: Suntour Cyclone F&R, Finger tip or PDL-M down tube shifters
Cluster: Suntour Winner steel 13-24
Chain: D.I.D. chrome plated
Crank Set: Sunino Mighty Compe 42-52 black
Pedals: MKS UR-K black
Wheels: Araya 27x1 1/4 alloy clinchers, IRC 27x1 1/4 GSW Hi-Racer tires
stainless steel spokes
Hubs: Sunshine Pro-Am low flange
Saddle: Elina Super-Pro
Seat Post: Sakae RY-PI
Extra: Toe clip and strap, fully reflectorized
Color: pearlized orange, blue silver
Weight: Approximately 23lbs for a 23.5" frame

People who friended this bike the fumingator, AFenvy, 3questionmarks, M0THER, Velogarden, pedalwrench, FullRinse, rogerrabbit, Splined, velocepedestrian, rburnham13, boonie


You've found a true piece of jewelry.Your Semi would be worth every effort to track down some original components for a absolutely perfect time capsule.

Thanks. That is the plan.

Thanks. That is the plan. Its current single speed incarnation is temporary until I find: Sunshine Pro-am hubs, Araya Rims, black SunTour Cyclone derailleurs, fluted Sakae Royal stem and seatpost, etc, etc.


Are you planning 27" rims? They could be hard to find.

your paint is awsome!!!

the bar tape is a nice contrast. Any idea of the model name of your frame ? I have two Centurions. I don't know the model names, yours looks higher up on the model list over mine.

Semi Professional

Paint is original, believe it or not. The frame is fully chromed underneath as well. Looks fantastic. Not bad for thirty-five bones off of craigslist. (hahaha, bones, not allowed to say that word that sounds like doll-hairs on this site).

This one is the "Semi Professional", built with Champion #1 tubing. It was 2nd from the top, which was the Cinelli look-alike "Professional" model. Just below mine was the "Super LeMans" which was Champion #2 or #5 (cant remember) -- either one would still be an excellent frame.

Absolutely beautiful. I'm

Absolutely beautiful. I'm not really feeling the yellow bartape, but wow this bike is just stunning.

Thanks. Yeah, I'm not

Thanks. Yeah, I'm not feeling the yellow bartape much either. It seemed like a great idea at first, but now it kinda makes me crave a juicy burger. :-) Any suggestions? Not black; it's a little too Halloween.


Incredibly nice.

Fantastic job on a very well-preserved bike.

I love the orange colour! I

I love the orange colour! I have just acquired one of these in blue (64cm ctt)in extremely good original condition. It retains most of its original parts, except wheels, seat/seatpost. I had the right seatpost, and I have a set of Araya 27x1-1/4 rims and some NOS Sunshine ProAm hubs I can lace up. I have ordered some Michelin World Tourer gum walled tyres for the right look. The hubs are black high flange, so not strictly speaking correct, but they are stunning and will go nicely with the rest of the black trim. I will get some pics up in a week or so. This model is really stunning. I had two Professionals when I was a lad, and am still hunting for one of those.

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