Any experience with the LeMond Geometry?

[Tommasini53]

I'm interested in his new steel frameset. The geometry is different from what I see in frames of similar size; namely the slack seat tube. I'm unclear how the few degrees of a slack seat tube would affect the fit and ride. Any experiences with this geometry would be appreciated.

ps. I should mention that I ride a frame on the small end of the sizing spectrum. I need a t.t. of 52-53cm. most frames in that range have a steeper seat tube angle than LeMond's.

[Mark McM]

Originally Posted by Tommasini53

I'm interested in his new steel frameset. The geometry is different from what I see in frames of similar size; namely the slack seat tube. I'm unclear how the few degrees of a slack seat tube would affect the fit and ride. Any experiences with this geometry would be appreciated.

How does the slack seat tube affect the fit and ride. Basically, it doesn't - or at least, not by itself. The seat tube angle is merely one variable in saddle setback, and by selecting seat posts with different setbacks, and even different shaped saddles, you can achieve the position and fit with either a steep or slack seat tube angle.

You may be familiar with the recent trend in specifying the size and fit of a frame by Stack (vertical distance from center of BB to center of the top of head tube) and Reach (horizontal distance from center of BB to to the center of the top of the head tube). Not by accident, seat tube angle does not factor into the Stack and Reach dimensions.

Now, if you personally prefer a large saddle setback, that may be more easily achieved on a "Lemond geometry" frame. But the "Lemond geometry" does not restrict one to using a large setback. Also of note is that the Washoe geometry appears to keep traditional effective top tube lengths, which means that with the slacker seat tube angle the frames will have a shorter Reach dimension than frames with the same top tube length and steeper seat tube. So if you use a traditional saddle setback with the Washoe, you may end up with a shorter cockpit length (and all that that entails).

[Tommasini53]

Thank you for the information. Do you have any preferred readings/research on stack and reach? I need to learn more so I can compare my current fit with what LeMond (and other builders) are offering for geometry.

I've had several bike fits in the past and the results were always given in "you need a top tube length of xx cm and a seat to handle drop of yy cm."

Will using Stack and Reach measurements provide me a better perspective across different frame geometries??? again.. many thanks for the reply.

[Steve in SLO]

For the rationale behind stack and reach, try this:

http://www.cervelo.com/en/engineerin...y-and-fit.html

I think they did a nice job as a primer for it.

[cmg]

See Lemond geometry at https://greglemond.com/#!/bb?m=105&s=55cm . the seat tube angles for a t.t. of 52-53cm are 74* and 73.5 respectively. when you compare the top tube lenghts 524mm and 531mm, the reach won't that much different than a bianchi with a 74-74.5 seat tube angles. the goal of the Lemond geometry is put more weight over the rear wheel. If your looking for a bike with a shorter reach you may not get it with the lemond. Compare the geometry of the bike your currently riding with the geom of the lemond. on this go around his head tube lenghts are taller than the TREK made Lemonds.

[lhuerta]

In addition to the Cervelo link posted above, here is more REQUIRED reading on stack and reach:

http://velonews.competitor.com/2012/...tically_216035

http://velonews.competitor.com/2012/...d-reach_217176


http://velonews.competitor.com/2011/...nd-more_162155

http://forums.thepaceline.net/showth...ht=stack+reach

[c-record]

Originally Posted by cmg

See Lemond geometry at https://greglemond.com/#!/bb?m=105&s=55cm . the seat tube angles for a t.t. of 52-53cm are 74* and 73.5 respectively. when you compare the top tube lenghts 524mm and 531mm, the reach won't that much different than a bianchi with a 74-74.5 seat tube angles. the goal of the Lemond geometry is put more weight over the rear wheel. If your looking for a bike with a shorter reach you may not get it with the lemond. Compare the geometry of the bike your currently riding with the geom of the lemond. on this go around his head tube lenghts are taller than the TREK made Lemonds.

True for sure but consider that old headsets add both and lower and upper stack height to the length of the headtube whereas new headsets add that 30-40mm into the headtube rather than the headset due to lower stack heights.