Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  

Go Back   > >

Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

User Tag List

Thread Tools Search this Thread
Old 01-05-13, 08:08 PM   #1
Senior Member
Thread Starter
Join Date: Mar 2008
Posts: 214
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Please help with this mystery frame: Centurion suspected but not sure!


Picked up this frame from ebay. It is the 1st bike for the year N=N+1 :-)
It has been repainted or powder coated and modernized so the component vintage is not that helpful in determining the frame. There is a serial no under the BB and it fits the Centurion format. Starts with M followed by 5 but it it is very faint it could also be a 3.
Some distinguishing features:

1- The rear dropouts are Suntour GS.
2- Wrap around seat stays
3- Long top tubes lugs
4- Seat post is SR Royal 26.8mm

It looks to be chrome plated underneath the paint but not 100% sure of that either.
I suspect its a Semi Pro but the 5 doesn't match.
Here are the pictures. I reach out to the collective wisdom of this forum for the final determination.
If indeed there is chrome under the lugs what is a good way to expose the chrome again.

Thank you for your help.
Attached Images
File Type: jpg FF73BD9D-C774-46B3-9762-955521521EF0-4048-0000069ECF838D31.jpg (100.0 KB, 28 views)
File Type: jpg 3A27DB71-8E32-435C-9D50-72DF46A4E58C-4048-0000069DE78949E0.jpg (79.1 KB, 24 views)
File Type: jpg 30D1BC32-50A5-44CD-93A6-6EAD4611C3C6-4048-0000069E39F3BAA4.jpg (81.6 KB, 22 views)
File Type: jpg 53F6AE96-48A1-445B-85F6-7D63DC0FA3DE-4048-0000069E5368E7AD.jpg (73.7 KB, 21 views)
File Type: jpg 135E52BD-99D0-4A94-8063-8AF5CE891DEB-4048-0000069E21CA1DC4.jpg (79.4 KB, 24 views)
File Type: jpg 472A6EF4-4B57-47B0-B83F-6A778ED16A13-4048-0000069DD1784F38.jpg (40.9 KB, 18 views)
File Type: jpg 703C06BA-F42E-42FB-B1E9-7C967A57B67E-4048-0000069DF2F909B7.jpg (58.1 KB, 18 views)
File Type: jpg 750FC805-6810-4A27-B707-9BF9C42D13F1-4048-0000069E5CAFD215.jpg (95.6 KB, 19 views)
File Type: jpg 18881DA2-5C0E-41F0-82C0-6BCAAE9B1054-4048-0000069E17A0DB68.jpg (84.7 KB, 16 views)
File Type: jpg AC596C13-4BB9-4D87-9B0A-F041A03855A2-4048-0000069E6E716C94.jpg (98.9 KB, 19 views)
File Type: jpg CD3C2ACA-8234-4D64-8155-B6F53B3F2585-4048-0000069E668E52A6.jpg (75.2 KB, 17 views)

Last edited by gmouchawar; 01-05-13 at 08:19 PM.
gmouchawar is offline   Reply With Quote
Old 01-05-13, 08:23 PM   #2
Senior Member
zukahn1's Avatar
Join Date: Oct 2011
Location: Fairplay Co
Bikes: Current 79 Nishiki Custum Sport, Jeunet 620, notable previous bikes P.K. Ripper loop tail, Kawahara Laser Lite, Paramount Track full chrome, Raliegh Internatioanl, Motobecan Super Mirage. 59 Crown royak 3 speed
Posts: 6,597
Mentioned: 10 Post(s)
Tagged: 1 Thread(s)
Quoted: 162 Post(s)
Looks like a very respectable piece of mid a 80's Japanes metal. Most of the parts are not original and it is repainted which makes a positive ID hard. Your guess that it a nicer Centution seems about right. It likely has chrome about half way up on the front and rear not the whole frame.
zukahn1 is offline   Reply With Quote
Old 01-06-13, 02:34 AM   #3
Senior Member
Thread Starter
Join Date: Mar 2008
Posts: 214
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
There a section of exposed metal around the bottom bracket. It is shiny. Could that be chrome?
The frame got some love with 8 speed upgraded drive train, rx100 Shimano sti, and is cold set to 130mm.
Between the paint and drive train upgrade a lot of effort was invested. They wouldn't have gone to such effort for a low end frame, would they?

Closest match is this frame:

But could the 5 in the s/n be for 1975?
This would mean the cable guides and dt shifter braze ons were added at the time of the repaint!

Last edited by gmouchawar; 01-06-13 at 02:56 AM.
gmouchawar is offline   Reply With Quote
Old 01-06-13, 03:02 PM   #4
Senior Member
Join Date: Nov 2004
Posts: 14,653
Mentioned: 211 Post(s)
Tagged: 1 Thread(s)
Quoted: 1225 Post(s)
I'm inclined to agree that this is probably a 1975 frame that was upgraded with braze-ons during the repaint process. Long point lugs had largely fallen out of popularity by 1985, as had full frame chroming. Dropout eyelets were rare on race frames of this level and most had converted to recessd brake mounts. Certainly, with the exception of the dropouts, the frame is a very good match for a 1975 Centurion Semi-Pro. To confirm, look inside the head tube to see if you can spot where the two, horizontally aligned head badge holes have been filled. If they are not present, it may be a Sekai Competition, which was a virtually clone, made by the same company, but used a head decal/sticker.
T-Mar is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -6. The time now is 04:20 AM.

  • Ask a Question
    get answers from real people!
Click to start entering your question.