midgetmaestro 

YOU feel like the midget here?

I'm 5'4-ish

46cm Fuji Compact

27" inseam

--I rest my case

Azeke

6'1"
61cm Fuji Team
34" Inseam

Peace and blessings,

Azeke

mumei

5' 8.5"
53cm
30" jeans

bas2205

6'8", 65cm Cannondale (plus long cranks and long seatpost...)

canflyboy

. How tall are you? 6'

2. What frame size do you ride? 57 Lemond 56 Brodie

3. What is your cycling inseam? 32

4. What is your pants inseam? 30

I'm long in the torso, short in the leg - both bikes original stems were increased by 20mm.

dirtyref

1. 5'8"
2. 52 on a CAAD9
3. No clue
4. 30

idcruiserman

6'
58 Felt F3C
34.5"
32"

bobthib

In addition to my road bike shown above, I'm now considering a 58 - 61cm Cyclocross bike. The reason for the rather large size is that I want to get a bike that my 6'4" son can ride for road use, and I can use for Cyclocross. It's the only way I can cost justify the purchase. What does the collective wisdom of BF say?

undisputed83

5'9... 54cm

noise boy

6' 4"
63cm CAAD9-7
39.5"
37"
(Yes I am all legs)

kamalster

5' 6"
51 cm frame
32"
30"

freeskihp

6'2"
57cm S-works frame
34"
32"

snake_p20

5'11"
58 cm Trek 1.5
33.5"
32"

Hickeydog

6'4"
60cm need a 62cm
no idea

cincyenginerd

I realize i'm digging up a 3-year-old thread, but as an engineer, i'm very data-driven and thought it would be interesting to collect the data from the survey and churn through it a bit. I used three values for the analysis - height, cycling inseam, and reported frame size. I used cycling inseam rather than pants inseam because I feel it's a more consistent, true measurement, and assumed those who provided it used a method similar to the CompetitiveCyclist fit calculator... pants inseams can vary by manufacturer.

The goal was to see if, by using the reported data, a frame size could be ascertained. I realize that frame sizing and corresponding fit to each person goes well beyond simple 'frame size', but that'd be quite a survey.

The data set was decent; about a hundred entries, but I found that a fair number of people in the 5'6" to 6'0" height range did not report their cycling inseam, so the data is heavy with people at 6'0" to 6'2" in height.

NOTE: Height and inseam measurements are in inches. Frame size is in centimeters. As an American, I love my mixed-and-matched dimensional units.

First, some histograms of height, inseam, and frame size. Nothing unexpected; all histograms follow a general bell curve.


Next, plots of frame size vs. height, frame size vs. inseam, and inseam vs. height. These plots are fairly scattered, but all appear to follow a linear trend with some bandwidth. Frame size (visually) appears to be more tightly correlated to height than to inseam length.


Fitting the data set to a polynomial yields a set of coefficients to relate height/inseam to frame size:



I used Excel to calculate my theoretical frame size using these coefficients:



User beware though: this result is by no means comprehensive, or a 'correct' estimation... just a fun afternoon data exercise.

Enjoy!

EDIT: If this thread gets some more input from forum members, i'll update the data set periodically

And my stats:
5' 10.5"
54cm Jamis Sonik
32.5" cycling inseam
30 or 32 pants inseam

My saddle-to-bar drop is pretty steep, however, and I feel a little 'cramped' in the cockpit.

BigJeff

Whoa.....

cool.

and the data supports all manufacturers that don't bother making frames over 60cm


6'4"
62cm
~37" cycling
36" pants

hybridbkrdr

I nearly broke my brain trying to figure out exactly what my size is. I'm 5'8-1/2" (174cm) with an 83.5cm inseam (as measured by a machine). A store carrying Trek to me I could use either a 51cm or 54cm Trek 520. But, after some communication with someone at Competitive Cyclist, I had the impression my "correct" size might be 53cm. Although I prefer the agility of a smaller frame so I'd be tempted to go with 52cm instead.

In any case, for my height some sites will say 16.5 or 17 inches for a mountain bike. I find my current 18" winter mountain bike is a little big for me so I ordered a 17 inch frame.

Also, although some sites seem to suggest 172.5mm cranks, and I do feel like my legs want to stretch a bit with 170mm cranks. But, after thinking about it, since I have a bit of chondromalacia in my knees, I'd prefer staying with 170mm.

EDIT: I received a WDCycle Elite frame I ordered on eBay which is 17 inches and although I haven't tried it yet, it has the same top tube length as a hybrid bike I find comfortable.

Cog_wild

it's the internet, you can be whatever you want.

cerealkilla

5'9" or 175cm. Frame size 53 to 55cm depending on manufacturer.

alexaschwanden

5'7"
54cm
127lbs

cincyenginerd

The original survey:

Height
Frame size(s)
Cycling inseam
Pants inseam

Don't know your inseam? Grab a book and check out this link to measure: https://www.competitivecyclist.com/za...LCULATOR_INTRO

JSchmo

Respect!
Yyou should re post as a pdf with better resolutionnso we can read/print out...


Nice job.


i happen to have your exact same measurements. and I ride a 56 Cannondale CAAD10. It is eeeeverrrr so slightly big, even with a 90mm stem. But the 54 felt quite cramped when i tested it, especially knees to elbows, and so I figured it was better to have a frame that encouraged me to stretch out and get lower....

Still i tie my brain in knots making tiny adjustments to seat set back, height, and shifter location on the bars.


Also I dont see why the makers don't make a range with nuances in the middle of the curve where the most folks fall...
eg 50, 52, 54, 55, 56, 58, 60, 62

hybridbkrdr

I wish I could remember the name of the frame made at every 1/2cm like 52.5cm, 53.5cm, etc. In my opinion, there would still be a bunch of people at 53 and 57. In any case, it's even worse for mountain bikes with 2 full inches between frames (like 5cm).

bobthib

5' 11'''

56 cm road bike,
58 cm tri bike

32''

30''

dimabear

man all you guys are so tall

i'm 5'5"
Pant Inseam: 27.5" (suits) 28" (slacks)
Bike: 48