Frame Size and Measurement.
01-22-07, 10:02 PM
#1
Stinky McStinkface
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Frame Size and Measurement.
This is an issue that has confused me, since I always thought a frame was measured by standover height.
I have a 29 inch inseam/stand over. My Raleigh has a 55.8 TT and 48 ST. I feel that I need to stretch forward a little more since my stem is short.
I want to buy an IRO but the smallest, which I thought would fit, judging from my current road frame measurements, the smallest won't fit.
Is there a fee to be measured at an LBS with the fitting gear?
This is not IRO specific. I want to learn about this for knowledge's sake.
Can someone really break this down in lay-terms?
I have a 29 inch inseam/stand over. My Raleigh has a 55.8 TT and 48 ST. I feel that I need to stretch forward a little more since my stem is short.
I want to buy an IRO but the smallest, which I thought would fit, judging from my current road frame measurements, the smallest won't fit.
Is there a fee to be measured at an LBS with the fitting gear?
This is not IRO specific. I want to learn about this for knowledge's sake.
Can someone really break this down in lay-terms?
Last edited by exfreewheeler; 01-22-07 at 10:08 PM.
01-22-07, 10:06 PM
#2
Senior Member
find somebody with an IRO and test ride it.
01-22-07, 10:20 PM
#3
hehe... member
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01-22-07, 10:36 PM
#4
VOTE FOR KEN WIND
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Are you sure you know your true inseam? I'm not trying to patronize you, so don't get mad. I just thought this might be useful.
Inseam Measurement
Materials:
A friend (makes things easier)
Book with a broad spine such as a small dictionary or textbook
Measuring tape
Flexible pants (sweatpants, pajama pants, even no pants)
1.) Stand up straight with your back against a wall and your feet flat. Your feet should be a shoulder under your shoulders.
2.) Take a large book and seat it firmly against the wall so that the spine is facing up and perpendicular to the wall.
3.) Pull the book snugly up under your crotch until you can't pull it up any further, but don't hurt yourself.
4.) Measure from spine of the book straight down to the floor to get your inseam.
Inseam Measurement
Materials:
A friend (makes things easier)
Book with a broad spine such as a small dictionary or textbook
Measuring tape
Flexible pants (sweatpants, pajama pants, even no pants)
1.) Stand up straight with your back against a wall and your feet flat. Your feet should be a shoulder under your shoulders.
2.) Take a large book and seat it firmly against the wall so that the spine is facing up and perpendicular to the wall.
3.) Pull the book snugly up under your crotch until you can't pull it up any further, but don't hurt yourself.
4.) Measure from spine of the book straight down to the floor to get your inseam.
01-22-07, 10:57 PM
#5
Stinky McStinkface
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I did that for my hand-made frame(hopefully coming soon). It came to 31 inches. I guess it is good for me, then. But I still want to know what this means for everyone else. Like I said, this is not for or because of any specific frame I am getting. I just want to be informed.
01-23-07, 07:16 AM
#6
jack of one or two trades
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Originally Posted by exfreewheeler
I have a 29 inch inseam/stand over. My Raleigh has a 55.8 TT and 48 ST. I feel that I need to stretch forward a little more since my stem is short.
I want to buy an IRO but the smallest, which I thought would fit, judging from my current road frame measurements, the smallest won't fit.
I want to buy an IRO but the smallest, which I thought would fit, judging from my current road frame measurements, the smallest won't fit.
Aside from that, I usually size a frame by the top-tube length and that's it. Standover doesn't really come into play unless you're talking about mountain/CX bikes, IMHO.
01-23-07, 08:23 AM
#7
aka mattio
there are a couple different fit calculators available online. i recommend using them (they give pretty much the same directions as ken wind, and then you put the numbers in, and you get a result) in combination with what you are and are not comfortable riding (based on experience) as well as the experiences of other people your height. maybe other people can chime in with links to fit calculators?
re: IRO, tho' your question wasn't aimed at it. how tall are you? maybe the 53 is a good option, since you're riding 56cm tt, short stem, and feel stretched out.
re: IRO, tho' your question wasn't aimed at it. how tall are you? maybe the 53 is a good option, since you're riding 56cm tt, short stem, and feel stretched out.
01-23-07, 08:37 AM
#8
THIS SPACE FOR RENT
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Originally Posted by Aeroplane
That bolded part is what has me scratching my head. Most frames have the top tube and seat tube at damn near the same lengths. Maybe a picture would help?
Aside from that, I usually size a frame by the top-tube length and that's it. Standover doesn't really come into play unless you're talking about mountain/CX bikes, IMHO.
Aside from that, I usually size a frame by the top-tube length and that's it. Standover doesn't really come into play unless you're talking about mountain/CX bikes, IMHO.
01-23-07, 08:53 AM
#9
Stinky McStinkface
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Originally Posted by Landgolier
Some of the new "ralieghs" (the brand has outlived the manufacturer) have semi-compact geo that would give numbers like this if you didn't do a "virtual" ST measurement.
My measuements might be a little off but its about right - 22 inches C to C = 55.8 TT, 19 inches C to C = 48.2 ST
