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When there are large gaps in frame sizing...

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When there are large gaps in frame sizing...

Old 06-10-20, 02:16 PM
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When there are large gaps in frame sizing...

I'm 5'11", pretty average proportions. A 57cm is likely my ideal size, but I've never had one. My current Miyata is a 58 and it's just a tad big, but a shorter stem makes it fit just fine. I've been looking for a 1986 Schwinn Voyageur. It goes from 21" to 23". or ~53.34cm to 58.42cm. That's a pretty large gap. What do you default to? Bigger for a touring frame, smaller for racing? It's difficult when a bike you really want just doesn't come in your exact size. I've found a really nice one in 21" but probably will hold for a 23.
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Old 06-10-20, 04:04 PM
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23"
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Old 06-10-20, 04:06 PM
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Originally Posted by cb400bill View Post
23"
+1
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Old 06-10-20, 04:09 PM
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I'm a shade over 5'10" and ride this 23" very comfortably.

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Old 06-10-20, 04:10 PM
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I always go bigger
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Old 06-10-20, 04:12 PM
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I’m 5’11” and all my bikes are 59 or 60s. I proportionately have long legs / short torso though...
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Old 06-10-20, 05:08 PM
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Originally Posted by polymorphself View Post
It goes from 21" to 23".
That sounds crazy, as I ride a 56cm (a very common size). And 57cm is my max.
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Old 06-10-20, 05:14 PM
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I am 5’9” and my 88 is a 23”. I find it’s not a true 23 so it gives me some nice sizing for me. Bigger frames for touring I thought is the rule.
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Old 06-10-20, 05:19 PM
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Originally Posted by SurferRosa View Post
That sounds crazy, as I ride a 56cm (a very common size). And 57cm is my max.
Right? I’ve seen a few bikes with this jump though and it seems odd when there is no 56 equivalent.

It seems like it would make sense for me to hold out for a 23.
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Old 06-10-20, 05:33 PM
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First generation Madison track machines, 21” to 23”... WTF!
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Old 06-10-20, 05:34 PM
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I’ve opined on this topic several times. At 6’1” I’m probably “supposed” to ride a 60cm. I fit that size fine but I only like it for a more leisurely pace. My go fast bikes end up being 57-59 and are much more responsive. I go to great lengths dialing in stems, bars, cranks and pillars so that my riding position feels the same on every bike.
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Old 06-10-20, 05:43 PM
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my imagined ideal frame geo would have a seat tube of 57cm and top tube of 55-56cm. i've never seen one with that ST vs TT arrangement in less than large or x-large frames, so i deal with longer top tubes and use shorter stems. sometimes short reach bars, too

go large, marge!! besides larger frames absorb better regarding comfort

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Old 06-10-20, 06:24 PM
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Originally Posted by polymorphself View Post
I'm 5'11", pretty average proportions. A 57cm is likely my ideal size, but I've never had one.
Andy_K has a dozen or so 57cm, if you're measuring CTC. Heck, I've got a few 57's hanging in the Atelier.
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Old 06-10-20, 06:38 PM
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Originally Posted by gugie View Post
Andy_K has a dozen or so 57cm, if you're measuring CTC. Heck, I've got a few 57's hanging in the Atelier.
C-T. Well, at the moment there are a handful of bikes I desire, 57 or otherwise, and I'm trying to not pick up anything that isn't one of these. Nothing crazy but certainly some heavy hitters. Well the two Peugeots I'll likely never have...

1986 Schwinn Voyageur
84/85 Trek 720
Miyata 1000
Raleigh Super Course
Raleigh International
Peugeot PX60
1987 Peugeot Savoie (px531s)

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Old 06-10-20, 07:10 PM
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For your racing attitude, go down. For sport/tourer, go up. I've convinced myself, without evidence, that larger bikes are too flexy or too heavy. I wish that I kept a really nice 24" TREK 710. But there is no way I'm buying that 24" TREK 760.
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Old 06-10-20, 09:07 PM
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Back when I was only 16 in 1974(!) my LBS carried Fuji - that came in 19, 21, 23, and 25" frame sizes. At only 5'8", I felt cramped fore-aft on the suggested 21" size frame so I went 23" (58.4cm) and never looked back. In retrospect, I probably could have swapped out a handlebar stem and been happy with a 21-inch frame, but that option was never suggested to me back then. Anyway, I prefer the long-reach type fit since I'm short legged and long of torso. Yeah, 'the boys' are a bit compromised if I try to stand flat-footed, but who does that anyway? That has never been an issue of 45+ years of riding my 'too-tall' 23" frame. yeah, and now I have picked up some 57cm frames... 56s would probably be ideal... but... I've grown to like the long toptube fit...











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Old 06-10-20, 10:59 PM
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Originally Posted by polymorphself View Post
What do you default to? Bigger for a touring frame, smaller for racing?
Pretty much, yeah that's it. BITD the way I was taught sizing was mostly stand over dependent. 1" to an inch and a half. At the 1" end was considered more touring, at the 1.5" end was more racing. You dealt with different body proportions by having multiple bike lines with differences in top tube length. Beyond that meant stem swapping etc.

5'11" is fairly typical for a 23" or 58cm. How's the stand over now? Stand over the bike, pull both bike wheels up off the floor as far as it goes. What's the distance? (this is the typical the old school sizing method)
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Old 06-11-20, 12:23 AM
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Originally Posted by Salamandrine View Post
Pretty much, yeah that's it. BITD the way I was taught sizing was mostly stand over dependent. 1" to an inch and a half. At the 1" end was considered more touring, at the 1.5" end was more racing. You dealt with different body proportions by having multiple bike lines with differences in top tube length. Beyond that meant stem swapping etc.

5'11" is fairly typical for a 23" or 58cm. How's the stand over now? Stand over the bike, pull both bike wheels up off the floor as far as it goes. What's the distance? (this is the typical the old school sizing method)
On my current 58 with 32mm tires barely an inch with shoes on until its in my bone. Feels mostly fine to me the reach was just a little much, but a shorter stem made it feel just right. Sounds like I should stick to the 23" when I find the Voyageur.

Last edited by polymorphself; 06-11-20 at 12:29 AM.
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Old 06-12-20, 11:32 AM
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when I first started working in bike shops in the early 70s. all brands came in 4 sizes.
19-21-23-25inch. then Italian bikes took over and they came 48 through 64.for 9 sizes
modern bikes come in small-medium-large or 3 sizes and I say WTF?
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Old 06-12-20, 11:40 AM
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Originally Posted by SurferRosa View Post
That sounds crazy, as I ride a 56cm (a very common size). And 57cm is my max.
BITD, production bikes came in 2" increments, typically 19, 21,23,25. Get a 23.
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Old 06-12-20, 01:32 PM
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Originally Posted by rando_couche View Post
BITD, production bikes came in 2" increments, typically 19, 21,23,25.
All well and good, but I've had bikes from almost every major manufacturer in my 56cm size (22").
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Old 06-12-20, 01:38 PM
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Originally Posted by polymorphself View Post
I'm 5'11", pretty average proportions. A 57cm is likely my ideal size, but I've never had one. My current Miyata is a 58 and it's just a tad big, but a shorter stem makes it fit just fine. I've been looking for a 1986 Schwinn Voyageur. It goes from 21" to 23". or ~53.34cm to 58.42cm. That's a pretty large gap. What do you default to? Bigger for a touring frame, smaller for racing? It's difficult when a bike you really want just doesn't come in your exact size. I've found a really nice one in 21" but probably will hold for a 23.
The top tube CTC on the Voyageur is 56cm. The CTC Seat Tube is 57cm. You're a Schwinn 23".
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Old 06-12-20, 06:00 PM
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Hmmmmmmmmmmmmmmmmmm................................ 54.5cm / 21-1/2" ********************?/
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