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Originally Posted by Duane Behrens
(Post 16341623)
The original owner was my size; around 5' 11". He was riding a 50 cm frame. Seat set way back and (probably) up, ultra-expensive Cinelli bars to add still more length.
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Originally Posted by Duane Behrens
(Post 16341623)
After spending 10 minutes typing Jane's and Molly's bike dimension data, ALL of it disappeared and I was logged out.
-Bandera |
Originally Posted by Duane Behrens
(Post 16341551)
Agreed. But I've seen the two of them together to know that Jane and "Molly" are very close to identical in size, shape and weight. .
We could debate this forever, but I believe that the proof of the pudding is in the eating. Regardless of how you did the fitting, if it helped the rider be more comfortable, and happier riding more, than it's a good fit. Could it be better? Maybe, but usually good enough truly is good enough. |
Originally Posted by well biked
(Post 16341678)
That's good. So it was the previous owner who had the wrong size bike and had equipped it with a disproportionate stem to try and compensate.
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Originally Posted by FBinNY
(Post 16341721)
The Eggs Benedict method strikes again.
We could debate this forever, but I believe that the proof of the pudding is in the eating. Regardless of how you did the fitting, if it helped the rider be more comfortable, and happier riding more, than it's a good fit. Could it be better? Maybe, but usually good enough truly is good enough. Jane and Molly have similar arm, torso and leg lengths (not to mention two very nice derrieres). So duplicating Jane's bike geometry to Molly's was a no brainer - the perfect starting point. We'll ride this weekend; I'll let you know how she likes it. Thanks; I think we agree on most things. :-) |
Now that you came here, you can ask Her what She wants for a Bike fit, we aint going to be riding it.
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Originally Posted by Duane Behrens
(Post 16341930)
How do you suppose the LeMonde and other methods were established? Easy - they measured groups of various riders with similar arm, torso and leg lengths, then converted those groups' most comfortable and efficient ergonomics into standardized fit dimensions.
Jane and Molly have similar arm, torso and leg lengths (not to mention two very nice derrieres). So duplicating Jane's bike geometry to Molly's was a no brainer - the perfect starting point. We'll ride this weekend; I'll let you know how she likes it. Thanks; I think we agree on most things. :-) BTW, Greg LeMond's fitting method was based largely on him and he had unusual proportions in that his femurs were longer than most people relative to his leg length and overall height. His frames had shallow seat tube angles that didn't work for most riders. So, be aware that a "standardized fitting method" may not be standardized for you. |
Originally Posted by HillRider
(Post 16342559)
"Standardized fit dimensions" are, at best, a starting point for individuals. Some riders are quite tolerant of a variety of bike positions and others very particular. You may have to make adjustments.
BTW, Greg LeMond's fitting method was based largely on him and he had unusual proportions in that his femurs were longer than most people relative to his leg length and overall height. His frames had shallow seat tube angles that didn't work for most riders. So, be aware that a "standardized fitting method" may not be standardized for you. I finished the initial setup (new shorter bars and stem, and seat moved forward slightly) 2 days ago. Jane, my beautiful assistant and test rider, loved the way it rode and felt. So I'm close. But Molly had asked for flat handlebars; I don't have any and had to order those. And the handlebar tape I bought looks cheesy - shiny plastic. So it's all back apart again, waiting on the new bars. Hopefully I'll get the bars in before Sunday. The original bars were 40cm, as are the new bars. Wishing now I'd ordered the bars in the narrower 38 cm size. Molly is smallish. But Jane never noticed the difference when I narrowed her bars from 40 to 38 cm. Hopefully Molly will also be fine with it. These are fun projects. For around $100 and a few hours of labor, I think I can provide a good friend with a bike she'll be much happier with, and will therefore ride more. Thanks for the help, all of you. DB |
Originally Posted by Duane Behrens
(Post 16342634)
But Molly had asked for flat handlebars; I don't have any and had to order those.
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Originally Posted by HillRider
(Post 16342559)
BTW, Greg LeMond's fitting method was based largely on him and he had unusual proportions in that his femurs were longer than most people relative to his leg length and overall height. His frames had shallow seat tube angles that didn't work for most riders.
Lemond's published fitting methodology is based on his French coach Cyril Guimard's fitting system which was developed over many years with the assistance of physiologist Dr. Ginet, engineer Wilfied Huggi, the Renault wind tunnel and TdF cyclists. It does not replicate GL's fit but produces a unique competitive baseline fit for each rider. Greg's position was optimal for him and custom frames were made to measure for him, as one would expect for a World Champion. Read the sub-chapter "Be Wary of Steep Seat Tubes" to understand the logic of Guimard/LeMond on efficient frame design for stage racing in the classic period in GL's "Complete Book of Bicycling". -Bandera |
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Originally Posted by HillRider
(Post 16342687)
You realize that brake levers (and/or shifters) for flat bars have a different clamp diameter and configuration than those for drop bars and the stem's handlebar clamp diameter may be different so plan on changing them also. The conversion from drop to flat bars is not completely straightforward.
http://bikeforums.net/attachment.php...hmentid=355823 |
If you want to add top mount additional brake levers , they go on the big round part in the Center.
AKA, Interruptor levers, as they interrupt the housing , the cable passes straight through. |
Originally Posted by Duane Behrens
(Post 16341930)
Jane and Molly have similar arm, torso and leg lengths (not to mention two very nice derrieres). So duplicating Jane's bike geometry to Molly's was a no brainer - the perfect starting point. |
Originally Posted by Duane Behrens
(Post 16339627)
Drew and FB jumped to conclusions, when they SHOULD have asked "How far did you move it forward?" or "Where was the seat positioned before you moved it?"
A blanket statement like "You can't use saddle position to set reach" is not only inappropriate - it's incorrect. Saddle position DOES affect reach to the bars, unavoidably, and every time you change it. Drew, if you were correct in your assertion that we CAN'T use seating position to affect reach, we'd all be living with fused, non-adjustable saddles. Fortunately we don't, and are thus able to combine seat position, stem length and height, even crank lengths to find a comfortable and safe geometry combination. Thanks. Agree with the quote on integrated bars being an expensive way to limit your sizing choices. Sure is pretty, though. :-) Regardless of where the saddle was originally, the OP should adjust the saddle positon based on the rider's preference and comfort over the pedals. We have no idea if the original position was bad or not, but the fact remains that (it sounds as if) he simply moved the saddle to reduce reach, not to position the rider over the pedals. That is not the correct sequence to obtain good fit. On the other hand, I would never argue against anything that the rider truly feels is better and more comfortable. So... regardless of my pedantry, it sounds like the right moves were made. Because, even with the rules of thumb, measurments, etc., trial and error and tweaking are the way good fit is accomplished. Bottom line is that she loves the bike and rides comfortably. |
Originally Posted by FBinNY
(Post 16343503)
My reference to Eggs Benedict wasn't a criticism. Using a stand-in for measurement is a proven and valid method. As I said in the same post, the result is what counts, not the method.
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It's not quite as pretty as it was before. But it's certainly more functional for the current owner. The top 2 left hand photos are "Before." The other 2 photos are "After":
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LeMond's preference for shallow seat tubes was the key to relieving knee pain for me. When that book first came out I was racing and suffering from serious knee pain. I read the book, set the saddle to his suggestions and the 20 years since has been blissfully pain free.
Yes, top tubes of his bikes are too long for me, but love 72 degree seat angles! Allows me to locate my knees behind the pedal spindle. |
Speaking of Cinelli bars, it is a little known fact that handlebar design reached its absolute zenith with the model 66.
Been downhill ever since. Ritchey has some nice traditional deep drops, but it's not quite the same. |
Now I'm really confused. I thought you originally said that the bike was a Cannondale. That one certainly looks like a Giant to me...
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For WIW. Giant may have gotten the frame contract to build the new Cannondale branded stuff.
They are that Big.. Now .. really huge. Merida is Big too.. |
The drop levers look like they're way high up on the bars. You might get a better result by moving the levers down, then rotating the handle bars. That provides a little more flat space making riding on the hoods easier.
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Originally Posted by DinoShepherd
(Post 16355956)
Speaking of Cinelli bars, it is a little known fact that handlebar design reached its absolute zenith with the model 66.
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That's an awful large amount of spacers below the stem, especially if the steerer is carbon. In general, that looks like you are trying to fit too large a frame to someone.
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Originally Posted by deep_sky
(Post 16356285)
That's an awful large amount of spacers below the stem, especially if the steerer is carbon. In general, that looks like you are trying to fit too large a frame to someone.
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You are right, I meant to type small instead of large :)
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