Absolutely not true, for aerodynamics on the bike or for any other kind of aerodynamics.
I can't even envision a short and fat position. How do you make that happen?Long and low or short and fat.
Changing Stem Length after bike fit
I've seen that at a few sportives
But back to the OPs question, I think it's best to used your fit as a reference more than an absolute. I've gone 2cm narrower in bars and 1cm longer in stem since my last fit along with marginally lower and am just as comfortable, but my initial fit was pretty far away from where I am now.
That's interesting, people said Obree was daft. But what he proved that is relevant in the context of road riding, was that bent elbows are faster. In fact, he didn't really prove that as it was pretty much common knowledge. What Obree showed was what could be gained by maximizing this position. I think it is obvious that I am not suggesting setting up a road bike to acheive the Obree tuck.wingguy wrote: ↑Fri May 04, 2018 7:39 amExactly, It's a pointless and daft thing to say in the context of road riding.Mr.Gib wrote: ↑Thu May 03, 2018 11:21 pmExactly. The areodynamic superiority of this position is massive. Obree won using much less power.
With the massive industy (manufacturers and consumers) investment in aerodynamics for the road, I can't imagine why optimizing the body, the part of the system that has by many magnitudes the greatest influence on aerodynamics, would ever be considered pointless.
Here's another one for you - assuming a fixed saddle height, which is more aerodynamic - peddaling with the toe down or with the foot level? No idea of the answer, but I am curious (with appologies to the OP for the hijack).
wheelsONfire wrote: When we ride disc brakes the whole deal of braking is just like a leaving a fart. It happens and then it's over. Nothing planned and nothing to get nervous for.
No. Shape matters, a lot.
Tilted cylinder 's Drag Coefficient (fore arm straight down in drop) is a lot worse than a straight ahead cylinder (forearm horizontal in drop) even without talking about the frontal area (which bent elbow with horizontal forearm also have less surface area of arm expose).
The were also some (informal) talk about belly actually fill the gap in the torso area make the shape more aero for the same surface area... which obviously not helping as much as the belly fat harm ability to sit in lower position.
Doesn't steering become less responsive as you increase the stem length?
This is a helpful discussion because I had removed spacers about 1cm and never changed my stem length. Should I get a longer stem and why?
This is a helpful discussion because I had removed spacers about 1cm and never changed my stem length. Should I get a longer stem and why?
2019 Giant TCR Advanced Pro 0 Disc
When you remove spacers the reach effectively gets longer so you could potentially get a shorter stem if needed. It's probably just a few mm though so you probably don't need a full cm shorter stem.
Just as it is obvious that simply stating without context, in a discussion of road riding positions, that a very high and very short stem is better aerodynamically than long and low is pointless, counterproductive, and fundamentally bad advice.
What you say is true but, as opposed to presenting it as simple universally applicable advice, I am working from the assumption that the readers on this forum will pause to contemplate the seemingly radical suggestion, and synthesize the context in their thought process (just as you did).
It is a suggestion designed to compel the reader to contemplate more implications of handlebar location, and help them to avoid pointless, counterproductive, or fundamentally bad advice.
It is thoughtful of you to protect those readers who may not get my point, but I was not writing for them.
wheelsONfire wrote: When we ride disc brakes the whole deal of braking is just like a leaving a fart. It happens and then it's over. Nothing planned and nothing to get nervous for.
Obree still has a flat back in his poistion, so I'm not sure why you're all arguing about this. If you look at photos of riders doing time trials in days gone by (before the invention of the TT bike, think Anquetil, or early Hinault) then they still have a very aggressive position, but with quite high handlebars, they achieve that position by bending their elbows. These days riders have lower handlebars but the same back angle.
Also, the analogy of the child on a sit-up-and-beg bike being more aero than Indurain is slightly meaningless because the child, by sitting bolt upright, acts like a sail, which Indurain does not because he is tucked in low. The child is probably still more aero because they're so small, but that's about as far as it goes.
Long and low looks cool too, who wants to look like Graeme Obree?
Also, the analogy of the child on a sit-up-and-beg bike being more aero than Indurain is slightly meaningless because the child, by sitting bolt upright, acts like a sail, which Indurain does not because he is tucked in low. The child is probably still more aero because they're so small, but that's about as far as it goes.
Long and low looks cool too, who wants to look like Graeme Obree?
Not really less responsive. Less twitchy I’d say.
I guess technically less responsive, but in a good kind of way.
Depends what you ride now of course. Most modern racing frame geometries seem to be made with a 110-130 stem length in mind.
