Greg: This chain stay length discussion echoes an inquiry I made months ago on where to properly positon the rear axle. On my bikes, measuring imaginary intersection of seat and chain stays places axle nearly full back into drop-out effectively rendering most of the drop-out a waste of metal. And, questioning the purpose of an adjuster longer than merely several mm's.
I'm hoping some of the frame builders will comment on this.
I remain puzzled on both counts.
Richard Cielec Chicago, Illinois
gpvb1@comcast.net wrote: Well, you measure it as it would be measured on a drawing, which is what it was made from. No need to over-think this. The only thing that isn't measured center-to-center is the seat tube length (when describing a frame) (sometimes). Think line drawings - where do the tubes' centerlines intersect, and where is the center line of things like the axles? Measure to those points. Greg Parker Ann Arbor, MI
Date: Sat, 7 Aug 2004 08:27:01 -0500 From: "Douglas Morrell" To: Subject: re:[CR] When did Raleigh International geometry change?
R Cielec wrote:
"So, how does one measure stay length?
To my uneducated point of view, I don't know what the precise end points would be. For example, on the drop-out end, there's: the depth of the slot in the stay for the drop-out; the tip stay."
To which Doug replied:
I don't know the precise answer to that in frame builder's jargon, but for the purposes of comparison I think all we need is consistency in process. I would propose center of BB spindle to rear-most point of drop out slot as a measure of "effective" chainstay length.
On my 23.5" International it is 17 5/8", or using 2.54 cm to inch conversion, 44.77cm. I would consider it "long" as I have plenty of room to mount a frame pump on the backside of the seat tube and still easily install the rear wheel.
Doug Morrell
St Louis MO
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