I feel dumb for not figuring it out before now. Over the winter I made some TT position adjustments, but nothing drastic. I lowered my bars about a centimeter. And I switched stems - same length and angle, but went to a Thomson stem, which has a much narrower witdth at the handlebar clamp than my old one. When I was switching stems, I thought, 'this would be a good time to flip the little clamps that hold my aerobars to my base bars.' That will allow me to move the aerobars closer together and narrow my position.
So I did both. I added a narrower stem and flipped the clamps. I used to be able to sit a water bottle on the top of my front tire while warming up on the trainer. My aerobars were just the right distance apart and just the right height above the tire to hold the bottle. After the adjustment, I couldn't even come close to getting a bottle between the bars, but it felt ok, so I went with it.
Well, I think the narrow arm position, while aero, I'm sure, limited my leverage at the front end and drastically reduced my power output. Think about trying to crank out lots of wattage if you can only grab the stem on your bike with both hands while pedaling. That's an extreme example, but it's sort of what I was trying to do.
I haven't done any power testing, but based on how I felt on my first TT ride after widening the bars, I think I'm onto something. Wider bars, 1cm higher bars, and seat forward 2cm to open my hips a little more: hopefully those changes will combine to bring my TT mojo back. I hope so, because it really sucks being slow.
Tuesday, April 14, 2009
Ah Ha!
Posted by Robert Jordan at 10:21 AM 0 comments
Labels: aerodynamics, physics
Friday, April 10, 2009
I am a Homosexual Communist Yankee.
First, I’ll say that the stretch of Silver Comet Trail between Rockmart and Cedartown is a rare gift to cyclists that I had not before experienced. A 10’ strip of concrete laid out among some of the most pastoral landscapes in Georgia. I rode it on a 75-degree sunny Thursday afternoon when there was rarely a soul to be seen on that stretch -- just cows, squirrels, and the occasional sluggish snake. I’m going to go back there – it was too good a ride not to repeat. I might also call the Path Foundation to find out who was most responsible for establishing that section of trail. They deserve a thank you letter.
Now for the other part of my afternoon tale:
“blah, b-blah, b-blahblahblah, FAGGOT COMMIE” from the one in the passenger seat. “Go home YANKEE BASTARD” from the one in the truck bed. Wow. Impressive. Perfect images of redneck anti-cyclists were made flesh before mine eyes. They were either more quick-witted than the average fat rubes or had practiced the insults in the mirror of their F-350 for weeks to get it juuuust right. Whatever the case, I was surprised and amused all at once as they hauled ass away, delivering enough black smoke out of the 6” tailpipe of the monster truck to prompt an edit of “An Inconvenient Truth.”
I’d like to investigate the motive, but first allow me to address my accusers.
Homosexual. I readily admit that from time to time I am overcome by the bulging, ripped, muscular gluteus maximii of my Security Bank teammates, covered by only embrocation and a fraction of a millimeter of lycra, ripping up Pate Hill. But I really, really, really like girls. A lot. So I think the gluteus thing must be more power envy than desire to bed a Banker. I’m sure there are homosexuals in the peloton, but as long as they don’t grab my ass or half-wheel me in a group ride, I really don’t care who they snuggle up with afterwards.
Communist. The guy must have been over 40, because I perceive “commie” to be a very 1980s flavor of insult – you know: Reagan, “Mr. Gorbachev, tear down this wall” and all that? Well, there was the time that, after a half bottle of Jack Daniels, I thought about giving all my crap to my neighbor, riding my ‘cross bike to Crater Lake, starting a bike taxi service, and living on Gu in an abandoned school bus. But when I sobered up, I realized that I really like all of my stuff and would like very much for it to remain mine. I might even like to have more stuff one day. A die-hard capitalist with moderate tendencies? Yes. A communist? Not so much.
Yankee. Hmmmm. That one’s pretty funny. I do live north of Macon. But I’ve heard tell that my great grandfather went quite a bit out of his way during the (not so) Recent Unpleasantness to kill as many Damn Yankees as he possibly could before turning 17 and enduring reconstruction eating sweet potatoes three meals a day in a 2-room dirt-floor cabin after Bill Sherman made his brutal march and killed all the family livestock. In 2009 Monticello may be a lot of things, but a Yankee hangout it is not. So I think I’ve established that insult as more than a little hollow.
So why was I the target of the unprompted verbal salvo by the big bubbas? I wasn’t even on THEIR road – I was on a prissy little big-city funded side trail and completely out of their precious way. Funny thing is, I can shift pretty smoothly from cyclist to redneck when I want to. I guess that makes me a double agent? I hunt, drive a truck (sort of), eat cornbread, drink sweet tea, and can talk real rural like. I think Lewis Grizzard was great and that the SEC can kick the PAC 10’s ass. So what’s the root of his hostility?
Maybe they saw my chiseled calves and thought I’d steal their women? I’ve got news for them: I’ve got a woman that is, by observation and by definition, smarter and finer than anything they could ever lure into the black hole of enlightenment they call existence. So there’s no threat to them there.
Maybe they want all the 2010 earmark money for more lanes on Highway 278. Maybe they thought I might use my faggot wiles and communist trickery to successfully lobby for more miles of trail, taking their tax money and limiting them to four lanes, requiring them to slow to 80 mph the next time three people decide to drive from Rockmart to High Point in the same afternoon.
Or maybe they are simple prudes. Maybe the sight of my gleaming bare flesh and the bulges in my bibshorts reminded them of their mothers’ beating the crap out of them for looking at girly magazines before they turned 35 and finally moved away from home.
Hmmm. I seem to have mentioned glutes, calves, and bare flesh a lot – maybe I’m seeing a common thread here?
Posted by Robert Jordan at 9:58 AM 2 comments
Labels: perspective
Wednesday, April 01, 2009
Too Aero - No Powero
I think I've overshot my optimization point. I've continued to lower the bars on my Cervelo over the past two years to get more aero. It's a process that takes time because your body has to adapt to the new position every time you change it.
I know the last change improved aerodynamics, because I proved that in coast-down testing last month. But my TT results have been sub-par lately. My road power has not suffered -- if anything, it's higher than a year ago. I suspect my TT problems are due to a loss of power related to my more aggressive position and more acute hip angle. I have the tools to test on the computrainer in various TT positions to check the theory, but it's tedious, painful, and 'trainer season' is over for me. So I think I'll start by flipping my 10-degree Thomson stem to the 'up' position to raise my bars a couple of centimeters and see what happens.
I've been playing around with this stuff for a couple of years using trial and error and my 'poor man's wind tunnel.' I have definitely made progress, but I think it's time to visit the low-speed wind tunnel with Nathan O'Neill in North Carolina this winter to take my positioning to the next level.
Posted by Robert Jordan at 9:30 AM 0 comments
Labels: aerodynamics, time trial