Lend me your eyes...
11-01-23, 07:24 PM
#1
Newbie
Thread Starter
Lend me your eyes...
Need an assist from some eagle-eyed N+1 enthusiasts. There's Centurion Pro Tour nearby (but not that nearby) that's caught my attention. The listing doesn't mention a size, what would you guess based on the head tube size?
Any sizing help would be appreciated. (And not mentioning this to the person to whom I'm related by marriage would be greatly appreciated.)
Any sizing help would be appreciated. (And not mentioning this to the person to whom I'm related by marriage would be greatly appreciated.)
Likes For d2702:
Likes For Piff:
11-01-23, 07:28 PM
#4
Senior Member
Join Date: May 2019
Location: Bloomington, IN
Posts: 2,950
Bikes: Paramount, Faggin, Ochsner, Ciocc, Basso
Mentioned: 117 Post(s)
Tagged: 0 Thread(s)
Quoted: 1303 Post(s)
Liked 1,912 Times
in
1,142 Posts
+1 on Piff's assessment. Smiles, MH
11-01-23, 07:30 PM
#5
Banned.
Join Date: May 2010
Location: Snohomish, WA.
Posts: 2,866
Mentioned: 33 Post(s)
Tagged: 0 Thread(s)
Quoted: 469 Post(s)
Liked 2,443 Times
in
646 Posts
53-54cm
Edit: take a look at the Pro Tour in the attached thread below
https://www.bikeforums.net/classic-v...onversion.html
Edit: take a look at the Pro Tour in the attached thread below
https://www.bikeforums.net/classic-v...onversion.html
Last edited by Roger M; 11-01-23 at 09:24 PM.
Likes For Roger M:
Likes For Reynolds:
11-01-23, 09:43 PM
#7
Newbie
I’ve seen that listing. For what it’s worth the seller states in the ad that it’s a 48cm small/medium frame.
11-01-23, 09:53 PM
#8
Garage tetris expert
Join Date: May 2016
Location: Texas Hill Country
Posts: 892
Bikes: A few. Ok, a lot
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 387 Post(s)
Liked 692 Times
in
329 Posts
53-54cm
Edit: take a look at the Pro Tour in the attached thread below
https://www.bikeforums.net/classic-v...onversion.html
Edit: take a look at the Pro Tour in the attached thread below
https://www.bikeforums.net/classic-v...onversion.html
I have a couple pro-tours with head-tubes that size, and they’re both 53.5
Likes For panzerwagon:
11-01-23, 10:04 PM
#9
Senior Member
Join Date: Sep 2014
Location: Baton Rouge La
Posts: 1,214
Mentioned: 22 Post(s)
Tagged: 0 Thread(s)
Quoted: 394 Post(s)
Liked 346 Times
in
230 Posts
53, maybe 54, center to top. I have an '83 Pro Tour that measures 55 ctt and the space between the top and down tube looks about 1 or 2cm more than this one. (this one being the one we're talking about in post number one)
Last edited by Hobbiano; 11-05-23 at 09:19 AM. Reason: clarification
Likes For Hobbiano:
11-01-23, 11:00 PM
#12
Senior Member
Join Date: Jun 2006
Posts: 20,305
Mentioned: 130 Post(s)
Tagged: 0 Thread(s)
Quoted: 3464 Post(s)
Liked 2,831 Times
in
1,997 Posts
‘this shows centerpull brakes and near midpoint pad adjustment, why I think a bigger frame. If the bike had short reach brakes, then 52 ctc would be I think a decent guess.
‘Japanese bikes also tended to have higher bottom brackets until the top tier models, that could argue a smaller frame, but often those bikes had longer top tubes to make the dimensions work better for no toe overlap.
this image is marginal to nail the size.
‘Japanese bikes also tended to have higher bottom brackets until the top tier models, that could argue a smaller frame, but often those bikes had longer top tubes to make the dimensions work better for no toe overlap.
this image is marginal to nail the size.
11-03-23, 05:11 AM
#13
spondylitis.org
Join Date: Mar 2013
Location: Fleetwood, PA, USA
Posts: 1,003
Bikes: '84 Colnago Super; '90 Bridgestone MB-1; '81 Trek 930; '01 Cinelli Supercorsa; '62 Ideor Asso; '87 Tommasini Super Prestige; '13 Lynskey R2300; '84 Serotta Nova Special; '94 Litespeed Catalyst; etc.
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 121 Post(s)
Liked 97 Times
in
63 Posts
53 - 54 cm, based on Centurion sizing methods. 
11-04-23, 08:08 AM
#14
Senior Member
I'm going to say 56. That's way off what others are saying ... but just looking at it in cold blood, that's what I see. On a 56x54 frame, a head tube can vary as much as a centimeter.
11-04-23, 07:32 PM
#15
Phyllo-buster
Join Date: Jan 2010
Location: Nova Scotia
Posts: 8,847
Bikes: roadsters, club bikes, fixed and classic
Mentioned: 133 Post(s)
Tagged: 0 Thread(s)
Quoted: 2298 Post(s)
Liked 2,055 Times
in
1,255 Posts
Does the listing identify the wheel size? I've been fooled by 650c wheelsets before.
11-04-23, 07:52 PM
#16
señor miembro
Join Date: Dec 2018
Location: Pac NW
Posts: 6,625
Bikes: '70s - '80s Campagnolo
Mentioned: 92 Post(s)
Tagged: 0 Thread(s)
Quoted: 3890 Post(s)
Liked 6,488 Times
in
3,211 Posts
47!
Likes For SurferRosa:
11-04-23, 08:18 PM
#17
Passista
Join Date: Jul 2005
Posts: 7,599
Bikes: 1998 Pinarello Asolo, 1992 KHS Montaña pro, 1980 Raleigh DL-1, IGH Hybrid, IGH Utility
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 868 Post(s)
Liked 721 Times
in
396 Posts
52 c-c was my guess, but forgot some use c-t, in that case it should be 53/53.5.
Likes For Reynolds:
11-04-23, 08:46 PM
#18
Senior Member
Join Date: Sep 2013
Location: Chicago
Posts: 1,082
Bikes: '72 Peugeot PX-10 '78 Motobecane Le Champion '83 Motobecane Grand Jubile '85 Trek 830 '88 Merckx Team ADR Corsa Extra
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 471 Post(s)
Liked 1,214 Times
in
651 Posts
11-05-23, 06:38 AM
#20
Full Member
Join Date: Mar 2022
Location: SW WI
Posts: 219
Bikes: Cannondale Topstone, Trek Dual Sport, State Bicycle Klunker
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 87 Post(s)
Liked 132 Times
in
69 Posts
Mmmmm, why would you not ask the seller? You even indicated you know who the seller is. Go look at it with a tape measure perhaps.
You’ve had experienced cyclist guess from 47-56, clearly a picture of the headset exclusively makes it difficult determine. One responder even says hey saw the ad and claims the ad says it’s a 48.
You’ve had experienced cyclist guess from 47-56, clearly a picture of the headset exclusively makes it difficult determine. One responder even says hey saw the ad and claims the ad says it’s a 48.
11-05-23, 06:51 AM
#21
Bianchi Goddess
Join Date: Apr 2009
Location: Shady Pines Retirement Fort Wayne, In
Posts: 27,860
Bikes: Too many to list here check my signature.
Mentioned: 192 Post(s)
Tagged: 2 Thread(s)
Quoted: 2930 Post(s)
Liked 2,928 Times
in
1,493 Posts
SurferRosa FWIW I'd say 53is Ask them to measure the standover height for you and send a pic of how to do it. It's much simpler to explain to a novice then the whole center to center seattube bit.
__________________
“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
Likes For Bianchigirll:
11-05-23, 07:22 AM
#22
Not lost wanderer.
Join Date: Jan 2013
Location: Lititz, Pa
Posts: 3,332
Bikes: In USA; 73 Raleigh Super Course dingle speed, 72 Raleigh Gran Sport SS, 72 Geoffry Butler, 81 Centurion Pro-Tour, 74 Gugie Grandier Sportier
Mentioned: 73 Post(s)
Tagged: 0 Thread(s)
Quoted: 886 Post(s)
Liked 999 Times
in
525 Posts
11-05-23, 07:38 AM
#23
feros ferio
Join Date: Jul 2000
Location: www.ci.encinitas.ca.us
Posts: 21,799
Bikes: 1959 Capo Modell Campagnolo; 1960 Capo Sieger (2); 1962 Carlton Franco Suisse; 1970 Peugeot UO-8; 1982 Bianchi Campione d'Italia; 1988 Schwinn Project KOM-10;
Mentioned: 44 Post(s)
Tagged: 0 Thread(s)
Quoted: 1393 Post(s)
Liked 1,329 Times
in
837 Posts
I was wondering when someone would bring up the crucial question of c-t vs c-c dimensioning.
__________________
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
Likes For John E:
11-05-23, 07:44 AM
#24
Bianchi Goddess
Join Date: Apr 2009
Location: Shady Pines Retirement Fort Wayne, In
Posts: 27,860
Bikes: Too many to list here check my signature.
Mentioned: 192 Post(s)
Tagged: 2 Thread(s)
Quoted: 2930 Post(s)
Liked 2,928 Times
in
1,493 Posts
That's why I usually ask a seller just to measure the standover height, it standard measure and much simpler to explain
__________________
“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
11-05-23, 10:57 AM
#25
The Huffmeister
Join Date: Jul 2008
Location: The Le Grande HQ
Posts: 2,741
Bikes: '79 Trek 938, '86 Jim Merz Allez SE, '90 Miyata 1000, '68 PX-10, '80 PXN-10, '73 Super Course, '87 Guerciotti, '83 Trek 600, '80 Huffy Le Grande
Mentioned: 45 Post(s)
Tagged: 0 Thread(s)
Quoted: 1226 Post(s)
Liked 3,555 Times
in
1,410 Posts
53 c-t-c
__________________
There were 135 Confentes, but only one...Huffente!
There were 135 Confentes, but only one...Huffente!