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what are average proportions?(20 posts)

what are average proportions?collinsc
Oct 31, 2002 6:11 PM
what is an average inseam for a given height? what about arm length?

is there some % value that represents average limb proportionality?
I am 5'11.5" 87cm inseam bare feet nmJustride
Oct 31, 2002 7:31 PM
wow your legs must start somewhere around your neck.Frith
Oct 31, 2002 8:10 PM
I'm 6'1" and have the same (87cm) inseam. Even I'm pretty leggy proportionaly speaking but not compared to you. Just goes to show "average" is a word that can't really be used to describe this sort of thing.
That said. I do remember in high school learning that ancient egyptions had a formula for figuring out "devine proportions" can't remember it though... anybody???
Old age! I am 1.25 inches shorter than I was at 20...........Justride
Oct 31, 2002 9:01 PM
amazing what gravity and 32 years of hard physical labor can do to a spinal column!
Me too, probably loss of cartilage (nm)Chen2
Nov 1, 2002 7:09 AM
Heck, I'm 5'11.6", 35.1"/89cm cycling inseamSlacker Joe
Nov 1, 2002 8:18 AM
Does that make me a superfreak?
I am 5'10" with 84cm of leg, so where does that put me?collinsc
Oct 31, 2002 9:03 PM
probably really damn close to average.

I'm just trying to understand what it really means when someone says they are all leg, or have a really long torso, or gorilla arms, or whatever.
Hey collinsc - we're twins! - help me out.Neluan
Nov 1, 2002 7:04 AM
I have exactly the same height and inseam as you do, so I'd like to hear your experiences regarding fit.
After mountain biking for 5 years I want to buy my first road bike but the sizing issue scares me, especially considering that where I live there are no fitting services and few road-oriented LBS.

What is your current bike?
Size/stem length?
Have you had any problems regarding bar/seat height difference?
Have you tried long tt vs. short tt bikes?

Even though I know that there are other factors involved such as arm reach and flexibility, your comments will be appreciated.
Hey collinsc - we're twins! - help me out.collinsc
Nov 1, 2002 7:59 AM
right now im on a 56 c-t seat tube and a 56.4 cc effective top tube with a 10cm stem. I also have a 11cm stem, and feel like I should have a 10.5cm stem. The bike has 73 degree seat and head angles. I have found I'm most comfortable with my saddle about dead center on the tube, so i use a Thomson post.

I have my bars down as far as they go and like em just fine there. I havent tried any more exaggerated geometry angles, but it is looking like you and I are fairly average people and the 'square' bikes with neutral angles might be just fine.

Oh yeah, and the LBSes by me all suck for road business too, I feel your pain. Good luck.
Hey collinsc - we're twins! - help me out.Neluan
Nov 1, 2002 9:30 AM
Thanks a lot - your help is appreciated.

Another couple of q's:
What is your current frame? I mean, did you find a brand that fit you better than others?

I have seen some Trek and Giant bikes. HAve you tried the compact frame?
I am 5'10" with 84cm of leg, so where does that put me?Snyder
Nov 2, 2002 7:24 AM
I am also 5'10" with 84 cm inseam. I ride a 54cm cannondale (couple years old) but think the 56 would fit better. My first road bike, and i'll know better next time.. I'll also probably have to travel to a not so local LBS.
Does it matter?PODIUMBOUNDdotCA
Oct 31, 2002 11:43 PM
Cyclists come in all different shapes and sizes. Take a look even at any world championship podium. Of course you have to match your body to the event you should be best at but there is no average weight to height ratio or upper body to lower.

Does it matter?yeah right
Nov 1, 2002 12:45 AM
how many pro cyclists have long torsos? My guess, not many.
sure it matters.collinsc
Nov 1, 2002 8:04 AM
If you can figure out your proportions in comparison to a mean value, then you have some better idea as to where to start with fitting and geometries. I've always thought myself to be fairly average, but now I'm just trying to find out how it really stands.

I'm not concerned about height to weight. That is worthless. I only care about the proportions of limb lengths.

Oh, and there is always an average.
186 cm/6´1 and 90 cm inseam nmcastrello
Nov 1, 2002 2:35 AM
curious myselftarwheel
Nov 1, 2002 4:45 AM
I am 5'11" with a 32.5 cm inseam in stocking feet. Although I have always thought of myself as long-waisted, I fit best on bikes with shorter top tubes because I am not very flexible -- can barely touch my toes. Flexibility is a big factor in bike fit and something that is often ignored.
Ah 32.5 cm inseam??Snyder
Nov 2, 2002 7:15 AM
5' 11" with an 81 cm inseam (nm)joekm
Nov 1, 2002 6:34 AM
5'1" with a 75cm inseam...._rt_
Nov 1, 2002 7:57 AM
but i'm not exactly what you'd call average height....and i have long legs.

r(not average at all)t
181 cm tall (5.9 feet); Inseam – 86.1 cm (33.9 inches) nmFTMD
Nov 1, 2002 8:26 AM